Need to add link to castling puzzle for problem 44070

http://www.chess.com/tactics/?id=230833

http://www.chess.com/tactics/?id=21377

[COMMENT DELETED]

Problems that don't meet the +2.5 better than the next best move criteria but are still unambiguous

[COMMENT DELETED]

Edited problems 

2 http://www.chess.com/tactics/?id=38141 extended to 2 moves with a nice forced king move, a3 pawn removed to make less ambiguous

1 http://www.chess.com/tactics/?id=37741 pawn on b2 removed, extended to show why black has to allow losing his bishop

Puzzles submitted 

http://www.chess.com/tactics/server?id=276347 Adriandmen.

http://www.chess.com/tactics/server?id=54327

http://www.chess.com/tactics/server?id=430111

http://www.chess.com/tactics/server?id=466489

http://www.chess.com/tactics/server?id=252135

http://www.chess.com/tactics/server?id=395025

http://www.chess.com/tactics/server?id=189278 the_knife

http://www.chess.com/forum/view/more-puzzles/puzzles-needed-for-tactics-trainer

http://www.chess.com/tactics/server?id=467053 sideline of Daeru puzzle

http://www.chess.com/tactics/server?id=355823 sideline of piphilologist puzzle

http://www.chess.com/tactics/server?id=223393 refutation of homernh puzzle

http://www.chess.com/tactics/server?id=468401 Powerlevel_9001

203 http://www.chess.com/tactics/server?id=282623 Martin0

202 http://www.chess.com/tactics/server?id=366193 Scottrf

201 http://www.chess.com/tactics/server?id=64691 Scottrf

200 http://www.chess.com/tactics/server?id=271339 schnitba

199 http://www.chess.com/tactics/server?id=449869 samlong1989 refutation

198 http://www.chess.com/tactics/server?id=233597 koala8

197 http://www.chess.com/tactics/server?id=447607 Abhishek2

196 http://www.chess.com/tactics/server?id=249561 Metaknight251

195 http://www.chess.com/tactics/server?id=378769 the_knife

194 http://www.chess.com/tactics/server?id=398967 the_knife

193 http://www.chess.com/tactics/server?id=245079 the_knife

192 http://www.chess.com/tactics/server?id=419267 the_knife

191 http://www.chess.com/tactics/server?id=453153 Metaknight251

190 http://www.chess.com/tactics/server?id=417825 wbane

189 http://www.chess.com/tactics/server?id=113041 Player5-VERY_HARD

188 http://www.chess.com/tactics/server?id=415003 Samlong1989

187 http://www.chess.com/tactics/server?id=475715 Samlong1989

186 http://www.chess.com/tactics/server?id=374935 negativeb

185 http://www.chess.com/tactics/server?id=317597 nyLsel

184 http://www.chess.com/tactics/server?id=123770 piphilologist

183 http://www.chess.com/tactics/server?id=392707 bobes

182 http://www.chess.com/tactics/server?id=203925 snar

181 http://www.chess.com/tactics/server?id=432847 bobes

180 http://www.chess.com/tactics/server?id=142147 onbliss (variation)

179 http://www.chess.com/tactics/server?id=324487 Metaknight251

178 http://www.chess.com/tactics/server?id=64046 the_knife

177 http://www.chess.com/tactics/server?id=269675 the_knife

176 http://www.chess.com/tactics/server?id=253193 the_knife

175 http://www.chess.com/tactics/server?id=159916 chess_persn

174  http://www.chess.com/tactics/server?id=215533 iixxPROxxii

173 http://www.chess.com/tactics/server?id=456345 Hessmaster

172 http://www.chess.com/tactics/server?id=338903 Reza_R 

171 http://www.chess.com/tactics/server?id=194189 Jpatrick

170 http://www.chess.com/tactics/server?id=132248 bobes 

169 http://www.chess.com/tactics/server?id=94503 vmay1072

168 http://www.chess.com/tactics/server?id=438501 Ponageman100

167 http://www.chess.com/tactics/server?id=182532 Ponageman100

166 http://www.chess.com/tactics/server?id=286817 iused

165 http://www.chess.com/tactics/server?id=219529 DaBigOne

164 http://www.chess.com/tactics/server?id=266387 TheIronDuke

163 http://www.chess.com/tactics/server?id=339297 sideline of 140

162 http://www.chess.com/tactics/server?id=300169 sideline of 140

161 http://www.chess.com/tactics/server?id=272599 sideline of 140

160 http://www.chess.com/tactics/server?id=307195 cflux

159 http://www.chess.com/tactics/server?id=270597 vmay1072

158 http://www.chess.com/tactics/server?id=297481 bobes

157 http://www.chess.com/tactics/server?id=463175 Player5-VERY_HARD

156 http://www.chess.com/tactics/server?id=358253 homernh

155 http://www.chess.com/tactics/server?id=259471 Genghis_McCann

154 http://www.chess.com/tactics/server?id=374663 PortlandPatzer

153 http://www.chess.com/tactics/server?id=232845 blaow

152 http://www.chess.com/tactics/server?id=326285 Ponagemon100

151 http://www.chess.com/tactics/server?id=435861 variation of 149

150 http://www.chess.com/tactics/server?id=85452 variation of 149

149 http://www.chess.com/tactics/server?id=474799 Metaknight

148 http://www.chess.com/tactics/server?id=389649 LegoPirate

147 http://www.chess.com/tactics/server?id=402265 Snar

146 http://www.chess.com/tactics/server?id=231031 JamieKowalski

145 http://www.chess.com/tactics/server?id=284985 rooperi

144 http://www.chess.com/tactics/server?id=369303 StrategicPlay

143 http://www.chess.com/tactics/server?id=437155 chessgm8

142 http://www.chess.com/tactics/server?id=327407 Budthestud

141 http://www.chess.com/tactics/server?id=220171 chess_persn 

140 http://www.chess.com/tactics/server?id=422759 nameno1had 

139 http://www.chess.com/tactics/server?id=320759 Dark_n_Stormy_Knight nice endgame problem

138 http://www.chess.com/tactics/server?id=244347 LegoPirate

137 http://www.chess.com/tactics/server?id=272129 LegoPirate

136 http://www.chess.com/tactics/server?id=356283 variation of 135

135 http://www.chess.com/tactics/server?id=470635  Rooperi

134 http://www.chess.com/tactics/server?id=259587 LegoPirate

133 http://www.chess.com/tactics/server?id=452343 Metaknight251

132 http://www.chess.com/tactics/server?id=349745 yennura

131 http://www.chess.com/tactics/server?id=158145 Thomas_Vandeputte

130 http://www.chess.com/tactics/server?id=433327 Thomas_Vandeputte

129 http://www.chess.com/tactics/server?id=304025 piphilologist

128 http://www.chess.com/tactics/server?id=436821 Metaknight251

127 http://www.chess.com/tactics/server?id=286433 JulioBr

126 http://www.chess.com/tactics/server?id=436681 Powerlevel_9001

125 http://www.chess.com/tactics/server?id=401415 sideline of 124

124 http://www.chess.com/tactics/server?id=468375 Spieler999 (short version)

123 http://www.chess.com/tactics/server?id=344833 Nao83

122 http://www.chess.com/tactics/server?id=426023 Spieler999

121 http://www.chess.com/tactics/server?id=124610 Spieler999

120 http://www.chess.com/tactics/server?id=329417 sideline from 121

119 http://www.chess.com/tactics/server?id=220411 nyLsel

118 http://www.chess.com/tactics/server?id=362589 cflux

117 http://www.chess.com/tactics/server?id=438015 sideline of 116

116 http://www.chess.com/tactics/server?id=232799 iixxPROxxii

115 http://www.chess.com/tactics/server?id=405423 from 114

sideline http://www.chess.com/tactics/server?id=418063

114 http://www.chess.com/tactics/server?id=344581 piphilologist

113 http://www.chess.com/tactics/server?id=423725 Powerlevel_9001

112 http://www.chess.com/tactics/server?id=349661 chessgm8

111 http://www.chess.com/tactics/server?id=112128 Vivinski

110 http://www.chess.com/tactics/server?id=396049 Vivinski

109 http://www.chess.com/tactics/server?id=274065 chessgm8

108 http://www.chess.com/tactics/server?id=310955 nwei

107 http://www.chess.com/tactics/server?id=308505 vipera_lebetina

106 http://www.chess.com/tactics/server?id=305797 Blackadder

105 http://www.chess.com/tactics/server?id=378265 father of 103-4

104 http://www.chess.com/tactics/server?id=316191 sibling of 103

103 http://www.chess.com/tactics/server?id=425619 Powerlevel_9001

102 http://www.chess.com/tactics/server.html?id=457427 vipera_raddei

101 http://www.chess.com/tactics/server.html?id=417603 Metaknight251

100 http://www.chess.com/tactics/server.html?id=420183 ClavierCavalier

99 http://www.chess.com/tactics/server.html?id=297857 TonyH

98 http://www.chess.com/tactics/server.html?id=425833 TonyH

97 http://www.chess.com/tactics/server.html?id=376139 nick4567

96 http://www.chess.com/tactics/server.html?id=308285 thomas0115

95 http://www.chess.com/tactics/server.html?id=415909 shoopi

94 http://www.chess.com/tactics/server.html?id=221411 shoopi

93 http://www.chess.com/tactics/server.html?id=167253 shoopi

92 http://www.chess.com/tactics/server.html?id=278281 nyLsel

91 http://www.chess.com/tactics/server.html?id=442547 Gwilym

90 http://www.chess.com/tactics/server.html?id=334349 Gwilym

89 http://www.chess.com/tactics/server.html?id=384175 nyLsel

88 http://www.chess.com/tactics/server.html?id=357263 Justified08

87 http://www.chess.com/tactics/server.html?id=71317 Spieler999

86 http://www.chess.com/tactics/server.html?id=92622 Spieler999

85 http://www.chess.com/tactics/server.html?id=343183 StrategicPlay

84 http://www.chess.com/tactics/server.html?id=317781 hessmaster

83 http://www.chess.com/tactics/server.html?id=272583 edvinj

82 http://www.chess.com/tactics/server.html?id=295219 edvinj (hard)

81 http://www.chess.com/tactics/server.html?id=426763 edvinj

80 http://www.chess.com/tactics/server.html?id=239275 edvinj

79 http://www.chess.com/tactics/server.html?id=198391 nyLsel 

78 http://www.chess.com/tactics/server.html?id=468499 hessmaster

77 http://www.chess.com/tactics/server.html?id=342353 hessmaster

76 http://www.chess.com/tactics/server.html?id=104346 shoopi, insanely difficult

75 http://www.chess.com/tactics/server.html?id=253765 easy sideline from 74

74 http://www.chess.com/tactics/server.html?id=453473 LegoPirate

73 http://www.chess.com/tactics/server.html?id=298463 sideline of 68

72 http://www.chess.com/tactics/server.html?id=239507 Najdorf Defense

71 http://www.chess.com/tactics/server.html?id=66812 NajdorfDefense

70 http://www.chess.com/tactics/server.html?id=356545 NajdorfDefense

69 http://www.chess.com/tactics/server.html?id=281985 shorter version of 67

68 http://www.chess.com/tactics/server.html?id=118926 Powerlevel_9001

67 http://www.chess.com/tactics/server.html?id=258863 edvinj

66 http://www.chess.com/tactics/server.html?id=467141 edvinj

65 http://www.chess.com/tactics/server.html?id=322589 edvinj

64 http://www.chess.com/tactics/server.html?id=235977 edvinj

63 http://www.chess.com/tactics/server.html?id=363825 edvinj

62 http://www.chess.com/tactics/server.html?id=283111 Powerlevel

61 http://www.chess.com/tactics/server.html?id=201999 Strategic play

60 http://www.chess.com/tactics/server.html?id=400331 jbzdarkid

59 http://www.chess.com/tactics/server.html?id=371733 variation of 56

58 http://www.chess.com/tactics/server.html?id=450629 variation of 56

57 http://www.chess.com/tactics/server.html?id=373945 variation of 56

56 http://www.chess.com/tactics/server.html?id=461789 gopacklittlebro

55 http://www.chess.com/tactics/server.html?id=341841 philologist endgame composition

54 http://www.chess.com/tactics/server.html?id=354559 like 51

53 http://www.chess.com/tactics/server.html?id=190601 like 51

52 http://www.chess.com/tactics/server.html?id=201189 Inspired by xdimkx’s suggestion on problem 412215

51 http://www.chess.com/tactics/server.html?id=213481 even shorter version

50 http://www.chess.com/tactics/server.html?id=472309 shorter version of 49

49 http://www.chess.com/tactics/server.html?id=102951 sideline from 48

48 http://www.chess.com/tactics/server.html?id=463489 Powerlevel_9001

47 http://www.chess.com/tactics/server.html?id=124707 xdimkx

46 http://www.chess.com/tactics/server.html?id=439739 +

45 http://www.chess.com/tactics/server.html?id=173409 +

44 http://www.chess.com/tactics/server.html?id=435831 +

43 http://www.chess.com/tactics/server.html?id=328461 +

42 http://www.chess.com/tactics/server.html?id=97282 variations from jbzdarkid submission

41 http://www.chess.com/tactics/server.html?id=456661 variation of 40

40 http://www.chess.com/tactics/server.html?id=364489 Powerlevel_9001

39 http://www.chess.com/tactics/server.html?id=154091 variation of 36

38 http://www.chess.com/tactics/server.html?id=248793 variation of36

37 http://www.chess.com/tactics/server.html?id=91717 variation of 36

36 http://www.chess.com/tactics/server.html?id=247625 shoopi

35 http://www.chess.com/tactics/server.html?id=300497 sibling of 27

34 http://www.chess.com/tactics/server.html?id=297937 sibling of 33

33 http://www.chess.com/tactics/server.html?id=201799 Powerlevel_9001

32 http://www.chess.com/tactics/server.html?id=290983 Powerlevel_9001

31 http://www.chess.com/tactics/server.html?id=272083 sideline of 27

30 http://www.chess.com/tactics/server.html?id=202027 sideline of 27

29 http://www.chess.com/tactics/server.html?id=241405 sideline of 27

28 http://www.chess.com/tactics/server.html?id=464359 sideline of 27

27 http://www.chess.com/tactics/server.html?id=412215 shoopi

26 http://www.chess.com/tactics/server.html?id=290593 sideline of weaponking's submission

25 http://www.chess.com/tactics/server.html?id=451307 variation of 24

24 http://www.chess.com/tactics/server.html?id=93574 nate23

23 http://www.chess.com/tactics/server.html?id=244049 sideline from

22 http://www.chess.com/tactics/server.html?id=430157 shoopi's composition

21 http://www.chess.com/tactics/server.html?id=361547 sNJesko

20 http://www.chess.com/tactics/server.html?id=321913 piphilologist

19 http://www.chess.com/tactics/server.html?id=407305 Daeru

18 http://www.chess.com/tactics/server.html?id=401137 nate123

17 http://www.chess.com/tactics/server.html?id=293393 shoopi

16 http://www.chess.com/tactics/server.html?id=252373 piphilologist

(pawn removed from each side to allow the problem to continue beyond 1 move, as otherwise f4 provided a competing good line)

15 http://www.chess.com/tactics/server.html?id=202533 sideline from 14

14 http://www.chess.com/tactics/server.html?id=260549 Shoopi

13 http://www.chess.com/tactics/server.html?id=300481

and

12 http://www.chess.com/tactics/server.html?id=237885

and

11 http://www.chess.com/tactics/server.html?id=54631 Shoopi

10 http://www.chess.com/tactics/server.html?id=400633 Shoopi

9 http://www.chess.com/tactics/server.html?id=248821 piphilologist

8 http://www.chess.com/tactics/server.html?id=368957 LazyChessPlayer3201

7 http://www.chess.com/tactics/server.html?id=416665

and

6 http://www.chess.com/tactics/server.html?id=197285 Daeru

5 http://www.chess.com/tactics/server.html?id=391957 Tapani

4 http://www.chess.com/tactics/server.html?id=68735 Daeru

3 http://www.chess.com/tactics/server.html?id=95795 Tapani

2 http://www.chess.com/tactics/server.html?id=345969 Martin_Stahl

1 http://www.chess.com/tactics/server.html?id=330147 Daeru

From videos or articles on chess.com

39 http://www.chess.com/tactics/?id=356185 Sunday times puzzle

38 http://www.chess.com/tactics/?id=312543

37 http://www.chess.com/tactics/?id=398013 variation of 35

36 http://www.chess.com/tactics/?id=198519 variation of 35 

35 http://www.chess.com/tactics/?id=430767 from http://www.chess.com/groups/forumview/b-v-n-endgame-puzzles2

34 http://www.chess.com/tactics/?id=272133 variation from http://www.chess.com/groups/forumview/my-own-endgame-study

33 http://www.chess.com/tactics/?id=467263 from http://www.chess.com/forum/view/game-showcase/game-4-in-eastern-class-championships-u2000

32 http://www.chess.com/tactics/?id=267633 Kramnik v Carlson London chess classic

31 http://www.chess.com/tactics/server?id=237279 from http://www.chess.com/forum/view/endgames/powerlevels-assorted-puzzles-28-3-pawns-vs-bishop

30 http://www.chess.com/tactics/server?id=209179 simple variation of 29

29 http://www.chess.com/tactics/server?id=197207 from http://www.chess.com/forum/view/more-puzzles/powerlevels-assorted-puzzles-28-3-pawns-vs-knight by Powerlevel_9001

28 http://www.chess.com/tactics/server?id=423561 from http://www.chess.com/forum/view/general/is-anyone-else-shocked-that-this-is-a-draw

27 http://www.chess.com/tactics/server?id=205557 noticed by Powerlevel from http://www.chess.com/forum/view/game-showcase/attack-defense-checkmate

26 http://www.chess.com/tactics/server?id=240849 from http://www.chess.com/chessmentor/view_lesson?id=6381

25 http://www.chess.com/tactics/server?id=457725 from http://www.chess.com/chessmentor/view_lesson?id=6365

24  http://www.chess.com/tactics/server?id=379323 (short version)

23 http://www.chess.com/tactics/server?id=455357 impossible Anand-Kasparov endgame http://www.chess.com/forum/view/general/superb-endgame-maneuvering

22 http://www.chess.com/tactics/server?id=334553 , and http://www.chess.com/tactics/server?id=288007 endgame from http://www.chess.com/forum/view/general/superb-endgame-study by Powerlevel_9001

21 http://www.chess.com/tactics/server?id=407681

20 http://www.chess.com/tactics/server?id=305819 and 21 http://www.chess.com/tactics/server?id=292115

18 http://www.chess.com/tactics/server?id=447911 and 19 http://www.chess.com/tactics/server?id=350109

17 http://www.chess.com/tactics/server?id=474557 from http://www.chess.com/forum/view/game-showcase/my-first-im-scalp

with endgame puzzles http://www.chess.com/tactics/server?id=106612 and http://www.chess.com/tactics/server?id=240107

http://www.chess.com/tactics/server?id=225315

16 http://www.chess.com/tactics/server?id=405647 from http://blog.chess.com/-waller-/finding-ways-to-achieve-your-plan

15 http://www.chess.com/tactics/server?id=446921 position from GM Melik's video http://www.chess.com/video/player/endgame-defense

14 http://www.chess.com/tactics/server.html?id=207699 from variation of 7

13 http://www.chess.com/tactics/server.html?id=305523 easy puzzle from the last game of Gserper's article

12 http://www.chess.com/tactics/server.html?id=359345 easier version of 11

11 http://www.chess.com/tactics/server.html?id=81177 From GM Gserper's first game in his 'Pawn storm!' article.

http://www.chess.com/article/view/pawn-storm2

10 http://www.chess.com/tactics/server.html?id=415269

9 http://www.chess.com/tactics/server.html?id=424115

8 http://www.chess.com/tactics/server.html?id=154776

7 http://www.chess.com/tactics/server.html?id=273133

and

6 http://www.chess.com/tactics/server.html?id=345477 variation

from IM Rensch's 11th rook ending video 

5 http://www.chess.com/tactics/server.html?id=444615 variation

ofhttp://www.chess.com/video/player/rook-endgames-masterful-bonus-video

4 http://www.chess.com/tactics/server.html?id=373343 from 

http://blog.chess.com/ozzie_c_cobblepot/11-better-to-be-lucky-than-good

3 http://www.chess.com/tactics/server.html?id=234733 brief version 

and

2 http://www.chess.com/tactics/server.html?id=254299 from FM Johannesson's 4th video on intermediate checkmates

http://www.chess.com/article/view/video-series-intermediate-checkmates# as an example of an Arabian mate. Gelfand v Kramnik 1996 http://www.chess.com/games/view.html?id=748190#

1 http://www.chess.com/tactics/server.html?id=249481

from IM Rensch's 7/10 video on rook endgames

Problems from exploring lines from other puzzles :

86 http://www.chess.com/tactics/?id=470175 variation of 83

85 http://www.chess.com/tactics/?id=165435 variation -  of http://www.chess.com/tactics/?id=98444

84 http://www.chess.com/tactics/?id=273415 variation of http://www.chess.com/tactics/?id=65154

83 http://www.chess.com/tactics/?id=168655 variation of 81 >2700 defense problem

82 http://www.chess.com/tactics/?id=409679 variation of 81

81 http://www.chess.com/tactics/?id=235069 variation of ambiguous puzzle, now edited http://www.chess.com/tactics/?id=177451

80 http://www.chess.com/tactics/?id=300923 variation from chesskid.com puzzle

79 http://www.chess.com/tactics/?id=244645 variation of Sunday Times puzzle

78 http://www.chess.com/tactics/?id=199205 short version of http://www.chess.com/tactics/?id=44068

77 http://www.chess.com/tactics/?id=214929 perpetual check from http://www.chess.com/tactics/?id=45624

76 http://www.chess.com/tactics/?id=445239 variation of 75

75 http://www.chess.com/tactics/?id=458891 variation of an ambiguous problem

74 http://www.chess.com/tactics/?id=428517 variation of http://www.chess.com/tactics/?id=60301

73 http://www.chess.com/tactics/?id=335109 variation of http://www.chess.com/tactics/?id=184807

72 http://www.chess.com/tactics/?id=103885 and

71 http://www.chess.com/tactics/?id=234985 from deleted problem

70 http://www.chess.com/tactics/?id=388093 variation of http://www.chess.com/tactics/?id=173409

69 http://www.chess.com/tactics/?id=125546 variation of http://www.chess.com/tactics/?id=41588

68 http://www.chess.com/tactics/?id=318097 and 

67 http://www.chess.com/tactics/?id=372353 variation of http://www.chess.com/tactics/?id=29607

66 http://www.chess.com/tactics/?id=223141 variation of http://www.chess.com/tactics/?id=26609

65 http://www.chess.com/tactics/?id=353347 variation of an ambiguous deleted problem

64 http://www.chess.com/tactics/?id=78673 sideline of http://www.chess.com/tactics/?id=31555

63 http://www.chess.com/tactics/?id=177651 sideline of http://www.chess.com/tactics/?id=29818

62 http://www.chess.com/tactics/server?id=153436 from an ambiguous deleted problem noticed by Ozzie

61 http://www.chess.com/tactics/server?id=408671 Ozzie's sideline of http://www.chess.com/tactics/server?id=378265

60 http://www.chess.com/tactics/server?id=213049 sideline of http://www.chess.com/tactics/server?id=367481

59 http://www.chess.com/tactics/server?id=215423 variation of http://www.chess.com/tactics/server?id=357125

58 http://www.chess.com/tactics/server?id=418031 variation of http://www.chess.com/tactics/server?id=406177

57 http://www.chess.com/tactics/server?id=304349

56 http://www.chess.com/tactics/server?id=357517 Ozzie endgame variation of Powerlevel's http://www.chess.com/tactics/server?id=290983

55 http://www.chess.com/tactics/server?id=353627 and 

54 http://www.chess.com/tactics/server?id=336735 sidelines of http://www.chess.com/tactics/server?id=118877

53 http://www.chess.com/tactics/server?id=80127 and

52 http://www.chess.com/tactics/server?id=342291 sidelines of http://www.chess.com/tactics/server?id=235847

51 http://www.chess.com/tactics/server?id=185211 improved version of an ambiguous problem

50 http://www.chess.com/tactics/server?id=125683 and 51 http://www.chess.com/tactics/server?id=373227 and 52 http://www.chess.com/tactics/server?id=379417 from http://www.chess.com/tactics/server?id=29203 (was ambiguous)

49 http://www.chess.com/tactics/server?id=184112 short version of http://www.chess.com/tactics/server?id=43560 (zugzwang)

48 http://www.chess.com/tactics/server?id=443403 from http://www.chess.com/tactics/server?id=33884 (altered)

46 http://www.chess.com/tactics/server?id=230853 and 47 http://www.chess.com/tactics/server?id=211581 from http://www.chess.com/tactics/server?id=342353

44 http://www.chess.com/tactics/server?id=226519 and 45 http://www.chess.com/tactics/server?id=400795 from http://www.chess.com/forum/view/more-puzzles/help-needed-to-checkalter-puzzle-to-go-on-tactics-trainer

43 http://www.chess.com/tactics/server?id=386329 sideline of http://www.chess.com/tactics/server?id=108552

42 http://www.chess.com/tactics/server?id=406565 sideline of http://www.chess.com/tactics/server?id=186483

41 http://www.chess.com/tactics/server?id=232037 sideline of http://www.chess.com/tactics/server?id=453153

39 http://www.chess.com/tactics/server?id=226297 and 40 http://www.chess.com/tactics/server?id=412617 from http://www.chess.com/tactics/server?id=249561

38 http://www.chess.com/tactics/server?id=375713

37 http://www.chess.com/tactics/server?id=361675

36 http://www.chess.com/tactics/server?id=357125 variation of http://www.chess.com/tactics/server?id=287631

35 http://www.chess.com/tactics/server?id=249993 Sideline of http://www.chess.com/tactics/server?id=331259

34 http://www.chess.com/tactics/server?id=263163 variation of an ambiguous, now deleted problem

33 http://www.chess.com/tactics/server?id=433585 variation of http://www.chess.com/tactics/server?id=124610 (puzzle 121 submitted by spieler)

32 http://www.chess.com/tactics/server?id=264067 variation of http://www.chess.com/tactics/server?id=293565 (as is number 16)

31 http://www.chess.com/tactics/server?id=380913 variation of http://www.chess.com/tactics/server?id=284487

30 http://www.chess.com/tactics/server?id=287631 variation of http://www.chess.com/tactics/server?id=454123

29 http://www.chess.com/tactics/server?id=237861 variation of http://www.chess.com/tactics/server?id=66436

28 http://www.chess.com/tactics/server?id=75111

Variation of http://www.chess.com/tactics/server?id=368597

27 http://www.chess.com/tactics/server?id=274957 variation of http://www.chess.com/tactics/server?id=366771

26 http://www.chess.com/tactics/server?id=281327 tricky defensive variation of http://www.chess.com/tactics/server?id=156845

25 http://www.chess.com/tactics/server?id=359173 from http://www.chess.com/tactics/server?id=464417

24 http://www.chess.com/tactics/server?id=132380 from http://www.chess.com/tactics/server?id=443675

23 http://www.chess.com/tactics/server?id=183726

22 http://www.chess.com/tactics/server.html?id=438727 sideline of 21 mate in 2

21 http://www.chess.com/tactics/server.html?id=464793 sideline of an ambiguous problem (now deleted)

20 http://www.chess.com/tactics/server.html?id=302191 continuation of http://www.chess.com/tactics/server.html?id=20878

19 http://www.chess.com/tactics/server.html?id=378401 sideline of http://www.chess.com/tactics/server.html?id=142590

18 http://www.chess.com/tactics/server.html?id=218417  sideline of http://www.chess.com/tactics/server.html?id=96919

with potential puzzle:

[FEN "r2q1b1r/1p1bk3/pn2pp1p/2p4Q/4N3/1P6/P1P2PPP/2KR2NR w - - "]

{ White has already blundered by playing Qe5-h5+ forcing Ke8-e7 instead of Nxf6! and now makes another blunder } 1.Nd6 { White rather naively thinks that Qf7+ will be possible. Not only can black play Be8 (+0.50) or Qb8 (-0.24) but black has a surprise move } 1...Nd5! { -2.30 blocking the defence of the d6 knight so Qf7+? allows the black king to pick up the knight on its way to safety. Black has stopped white's attack, and maitains a piece advantage. } 2.Nf5+ { white's best move doesn't achieve much } 2...exf5 

17 http://www.chess.com/tactics/server.html?id=431303 from http://www.chess.com/tactics/server.html?id=95803 (extended)

16 http://www.chess.com/tactics/server.html?id=383171 from http://www.chess.com/tactics/server.html?id=293565 

15 http://www.chess.com/tactics/server.html?id=222505 sideline from http://www.chess.com/tactics/server.html?id=29155

14 http://www.chess.com/tactics/server.html?id=216101 sideline from http://www.chess.com/tactics/server.html?id=21235

13 http://www.chess.com/tactics/server.html?id=345399 extension of 12

12 http://www.chess.com/tactics/server.html?id=198785 v hard extension of 11

11 http://www.chess.com/tactics/server.html?id=71980 sideline of http://www.chess.com/tactics/server.html?id=22000

10 http://www.chess.com/tactics/server.html?id=349173 extension of http://www.chess.com/tactics/server.html?id=36314 if black makes two poor moves

9 http://www.chess.com/tactics/server.html?id=393751 extended/ altered version of http://www.chess.com/tactics/server.html?id=738

8 http://www.chess.com/tactics/server.html?id=474071 mate in 2 after blunder line after problem 

http://www.chess.com/tactics/server.html?id=44412

7 http://www.chess.com/tactics/server.html?id=228973

and

6 http://www.chess.com/tactics/server.html?id=213859 

and

5 http://www.chess.com/tactics/server.html?id=95697 from endgame practice with the computer

4 http://www.chess.com/tactics/server.html?id=127177 defense from problem http://www.chess.com/tactics/server.html?id=36045

3 http://www.chess.com/tactics/server.html?id=113858 mate in 2 

and

2 http://www.chess.com/tactics/server.html?id=247145 perpetual check from http://www.chess.com/tactics/server.html?id=109136

1 http://www.chess.com/tactics/server.html?id=200515 discovered attack

from http://www.chess.com/tactics/server.html?id=86538

Problems from my own games

68 http://www.chess.com/tactics/?id=320823 variation of 67

67 http://www.chess.com/tactics/?id=414393 endgame - I should have lost to this

66 http://www.chess.com/tactics/?id=356611

65 http://www.chess.com/tactics/?id=434553 simple endgame simplification

64 http://www.chess.com/tactics/?id=169577

63 http://www.chess.com/tactics/?id=221581

62 http://www.chess.com/tactics/?id=211405 same game as 57

61 http://www.chess.com/tactics/?id=405029 same game as 57

60 http://www.chess.com/tactics/?id=107594 same game as 57

59 http://www.chess.com/tactics/?id=68717  same game as 57

58 http://www.chess.com/tactics/?id=444525 same game as 57

57 http://www.chess.com/tactics/?id=239533 amazing endgame

56 http://www.chess.com/tactics/?id=271353 munchkin3's game

55 http://www.chess.com/tactics/?id=257443 

54 http://www.chess.com/tactics/?id=304587

53 http://www.chess.com/tactics/?id=271657 variation of 51

52 http://www.chess.com/tactics/?id=408291 variation of 51

51 http://www.chess.com/tactics/?id=434309 defensive endgame puzzle preventing pawn promotion

50 http://www.chess.com/tactics/?id=302719 simple endgame 2v1 pawn

49 http://www.chess.com/tactics/?id=326705 variation of 48

48 http://www.chess.com/tactics/?id=107018 nice defence endgame =

47 http://www.chess.com/tactics/?id=299861 simple endgame

46 http://www.chess.com/tactics/?id=303085 and

45 http://www.chess.com/tactics/?id=338337 and

44 http://www.chess.com/tactics/?id=255287 and

43 http://www.chess.com/tactics/?id=254953 variation from same game as 42

42 http://www.chess.com/tactics/?id=295463 nice rook sac

41 http://www.chess.com/tactics/?id=262601 variation of 40

40 http://www.chess.com/tactics/?id=399677 variation of 39

39 http://www.chess.com/tactics/?id=432837 pawn breakthrough 

38 http://www.chess.com/tactics/?id=249395 nice escape from queen trap

37 http://www.chess.com/tactics/?id=472419 variation of 36

36 http://www.chess.com/tactics/?id=463931 nice drawing fortress

35 http://www.chess.com/tactics/?id=369019 mate in 5

34 http://www.chess.com/tactics/?id=348617 sideline of 33

33 http://www.chess.com/tactics/?id=158920 

32 http://www.chess.com/tactics/?id=373949

31 http://www.chess.com/tactics/?id=275019

30 http://www.chess.com/tactics/?id=272833 knight added on b5

29 http://www.chess.com/tactics/?id=411849 d pawn added for white

28 http://www.chess.com/tactics/server?id=241091

27 http://www.chess.com/tactics/server?id=383455

26 http://www.chess.com/tactics/server?id=298317 short version of 25

25 http://www.chess.com/tactics/server?id=135580 Bird game

24 http://www.chess.com/tactics/server?id=119827

23 http://www.chess.com/tactics/server?id=311889 

22 http://www.chess.com/tactics/server?id=455211 pin

21 http://www.chess.com/tactics/server?id=423225 pawn promotion

20 http://www.chess.com/tactics/server?id=466621 overloading

19 http://www.chess.com/tactics/server?id=338909 pawn promotion

18 http://www.chess.com/tactics/server?id=428091

17 http://www.chess.com/tactics/server.html?id=407869 simple mate

16 http://www.chess.com/tactics/server.html?id=233267 mate in 3

15 http://www.chess.com/tactics/server.html?id=208037

14 http://www.chess.com/tactics/server.html?id=256871 smothered mate

13 http://www.chess.com/tactics/server.html?id=359133 pin

12 http://www.chess.com/tactics/server.html?id=241061 pin

11 http://www.chess.com/tactics/server.html?id=257671 vulnerable king

10 http://www.chess.com/tactics/server.html?id=246987 mate in 4

9 http://www.chess.com/tactics/server.html?id=395715 overloading / deflection

8 http://www.chess.com/tactics/server.html?id=272427 pawn promotion

7 http://www.chess.com/tactics/server.html?id=268233 pawn promotion prevention

6 http://www.chess.com/tactics/server.html?id=283239 queen/rook working together

5 http://www.chess.com/tactics/server.html?id=332299 defense then attack

4 http://www.chess.com/tactics/server.html?id=285645 long mate

3 http://www.chess.com/tactics/server.html?id=351663 perpetual check

2 http://www.chess.com/tactics/server.html?id=325183 pin easy

1 http://www.chess.com/tactics/server.html?id=428697 v hard

From the approver pool (continued)

236 http://www.chess.com/tactics/?id=87282

235 http://www.chess.com/tactics/?id=359393 simple remove the defender

234 http://www.chess.com/tactics/?id=435069

233 http://www.chess.com/tactics/?id=269677

232 http://www.chess.com/tactics/?id=405933

231 http://www.chess.com/tactics/?id=161686 giving up queen for material

230 http://www.chess.com/tactics/?id=177703

229 http://www.chess.com/tactics/?id=462221

228 http://www.chess.com/tactics/?id=75572

227 http://www.chess.com/tactics/?id=454729

226 http://www.chess.com/tactics/?id=429957

225 http://www.chess.com/tactics/?id=399111

224 http://www.chess.com/tactics/?id=132806

223 http://www.chess.com/tactics/?id=197581

222 http://www.chess.com/tactics/?id=468557

221 http://www.chess.com/tactics/?id=211909

220 http://www.chess.com/tactics/?id=264499

219 http://www.chess.com/tactics/?id=398437

218 http://www.chess.com/tactics/?id=367273

217 http://www.chess.com/tactics/server?id=391873 variation of 216

216 http://www.chess.com/tactics/server?id=115898

215 http://www.chess.com/tactics/server?id=384017

214 http://www.chess.com/tactics/server?id=125502

213 http://www.chess.com/tactics/server?id=102425

212 http://www.chess.com/tactics/server?id=272341

211 http://www.chess.com/tactics/server?id=467695

210 http://www.chess.com/tactics/server?id=132866

209 http://www.chess.com/tactics/server?id=65154 

208 http://www.chess.com/tactics/server?id=342025 remove the defender

207 http://www.chess.com/tactics/server?id=474691

206 http://www.chess.com/tactics/server?id=406177

205 http://www.chess.com/tactics/server?id=312905

204 http://www.chess.com/tactics/server?id=445649 defense

203 http://www.chess.com/tactics/server?id=332565

202 http://www.chess.com/tactics/server?id=302305 queen trap

201 http://www.chess.com/tactics/server?id=433447 defence

200 http://www.chess.com/tactics/server?id=276189 en passant

199 http://www.chess.com/tactics/server?id=407217 variation of 198

198 http://www.chess.com/tactics/server?id=391375

197 http://www.chess.com/tactics/server?id=291197

196 http://www.chess.com/tactics/server?id=468573

195 http://www.chess.com/tactics/server?id=284237

194 http://www.chess.com/tactics/server?id=434171

193 http://www.chess.com/tactics/server?id=410045 hard defense

192 http://www.chess.com/tactics/server?id=343693 perpetual check

191 http://www.chess.com/tactics/server?id=310985 (variation of 190)

190 http://www.chess.com/tactics/server?id=171038 (nice)

189 http://www.chess.com/tactics/server?id=92060

188 http://www.chess.com/tactics/server?id=117411

187 http://www.chess.com/tactics/server?id=87512

186 http://www.chess.com/tactics/server?id=122213

185 http://www.chess.com/tactics/server?id=108552 nice double check

184 http://www.chess.com/tactics/server?id=71750 sideline of 183

183 http://www.chess.com/tactics/server?id=324191 hard attack

182 http://www.chess.com/tactics/server?id=94877 hard mate in ?15

181 http://www.chess.com/tactics/server?id=185378

180 http://www.chess.com/tactics/server?id=217505 easy problem

179 http://www.chess.com/tactics/server?id=396645 simple problem

178 http://www.chess.com/tactics/server?id=262009 amazing problem (extended)

177 http://www.chess.com/tactics/server?id=254015 ?Latvian gambit blunder

176 http://www.chess.com/tactics/server?id=138821

175 http://www.chess.com/tactics/server?id=356001 nice

174 http://www.chess.com/tactics/server?id=430687 simple remove the defender

173 http://www.chess.com/tactics/server?id=345075

172 http://www.chess.com/tactics/server?id=300993 nice simple mate in 3

171 http://www.chess.com/tactics/server?id=331259 nice

170 http://www.chess.com/tactics/server?id=460061 very easy fork

169 http://www.chess.com/tactics/server?id=289467

168 http://www.chess.com/tactics/server?id=303311

167 http://www.chess.com/tactics/server?id=418931

166 http://www.chess.com/tactics/server?id=199735

165 http://www.chess.com/tactics/server?id=328473

164 http://www.chess.com/tactics/server?id=347419 Backrank

163 http://www.chess.com/tactics/server?id=88394 Defense/Hanging piece

162 http://www.chess.com/tactics/server?id=367115 Simple mate in 2

161 http://www.chess.com/tactics/server?id=291405 Overloading

160 http://www.chess.com/tactics/server?id=436623 Discovered attack

159 http://www.chess.com/tactics/server?id=439195 Remove the defender/ Trapped piece

158 http://www.chess.com/tactics/server?id=167847 Vulnerable king (nice subtle tactic)

157 http://www.chess.com/tactics/server?id=342071 variation of 156. Vulnerable King/ Exchange sacrifice

156 http://www.chess.com/tactics/server?id=403913 Defense with a hard to find 3rd move

155 http://www.chess.com/tactics/server?id=366771 Discovered attack with a tempting blunder tactic

154 http://www.chess.com/tactics/server?id=94523 easy pawn promotion

153 http://www.chess.com/tactics/server?id=275739 remove the defender/ nice fork puzzle

152 http://www.chess.com/tactics/server?id=230833 defense (nice, hated by many!)

151 http://www.chess.com/tactics/server?id=470979

150 http://www.chess.com/tactics/server?id=260057 Nice double check

149 http://www.chess.com/tactics/server?id=437427 Skewer/ f7 attack

148 http://www.chess.com/tactics/server?id=226065 nice exploitation of a pin

147 http://www.chess.com/tactics/server?id=118852 easy discovered attack

146 http://www.chess.com/tactics/server?id=128795 easy double attack

145 http://www.chess.com/tactics/server?id=473225 edited bad problem (informed by Powerlevel) Nice mate in 3

144 http://www.chess.com/tactics/server?id=389555 Remove the defender

143 http://www.chess.com/tactics/server?id=225093

142 http://www.chess.com/tactics/server?id=352083 fork (with a tempting alternative attack)

141 http://www.chess.com/tactics/server?id=413013 fork / pawn promotion

140 http://www.chess.com/tactics/server?id=156845 Vulnerable king

139 http://www.chess.com/tactics/server?id=384321 backrank

138 http://www.chess.com/tactics/server?id=200429 sacrifice/ fork

137 http://www.chess.com/tactics/server?id=444679 vulnerable king

136 http://www.chess.com/tactics/server?id=464417

135 http://www.chess.com/tactics/server?id=313861 mate in 3+

134 http://www.chess.com/tactics/server.html?id=234509 simple mate in 3

133 http://www.chess.com/tactics/server.html?id=245919 xray

132 http://www.chess.com/tactics/server.html?id=87861 challenging vulnerable king

131 http://www.chess.com/tactics/server.html?id=368597 edited, nice quiet move

130 http://www.chess.com/tactics/server.html?id=281385 vulnerable king

129 http://www.chess.com/tactics/server.html?id=467299 double attack

128 http://www.chess.com/tactics/server.html?id=367481 vulnerable king

127 http://www.chess.com/tactics/server.html?id=252259 v simple

126 http://www.chess.com/tactics/server.html?id=396803 simple trapped piece

125 http://www.chess.com/tactics/server.html?id=182416 skewer

124 http://www.chess.com/tactics/server.html?id=457849 simple pin/ fork

123 http://www.chess.com/tactics/server.html?id=292905 variation of 122

122 http://www.chess.com/tactics/server.html?id=296715 preventing perpetual

121 http://www.chess.com/tactics/server.html?id=235847 

120 http://www.chess.com/tactics/server.html?id=190024 double attack

119 http://www.chess.com/tactics/server.html?id=134014

118 http://www.chess.com/tactics/server.html?id=353735 pin

117 http://www.chess.com/tactics/server.html?id=199561 promotion

116 http://www.chess.com/tactics/server.html?id=71426 nice continuation from an ambiguous problem

115 http://www.chess.com/tactics/server.html?id=178194 fork

114 http://www.chess.com/tactics/server.html?id=454123 fork

113 http://www.chess.com/tactics/server.html?id=219545 variation of 112

112 http://www.chess.com/tactics/server.html?id=433487

111 http://www.chess.com/tactics/server.html?id=392381

110 http://www.chess.com/tactics/server.html?id=311939 trapped piece

109 http://www.chess.com/tactics/server.html?id=238649 hanging piece

108 http://www.chess.com/tactics/server.html?id=257435 variation of 107

107 http://www.chess.com/tactics/server.html?id=143726 

106 http://www.chess.com/tactics/server.html?id=69525 trapped piece

105 http://www.chess.com/tactics/server.html?id=162824 vulnerable king

104 http://www.chess.com/tactics/server.html?id=443675 vulnerable king

103 http://www.chess.com/tactics/server.html?id=126670 hanging piece

102 http://www.chess.com/tactics/server.html?id=55318 a lovely problem - invited forum to look for sideline puzzles

101 http://www.chess.com/tactics/server.html?id=57609

100 http://www.chess.com/tactics/server.html?id=333691 mate in 2 (problem fixed. was ambiguous/ reported by users)

99 http://www.chess.com/tactics/server.html?id=183914 hanging piece

98 http://www.chess.com/tactics/server.html?id=435323 double attack

97 http://www.chess.com/tactics/server.html?id=66436 pin

96 http://www.chess.com/tactics/server.html?id=219535 mate in 3

95 http://www.chess.com/tactics/server.html?id=212477 skewer

94 http://www.chess.com/tactics/server.html?id=413279 discovered attack

93 http://www.chess.com/tactics/server.html?id=418151 pawn fork

92 http://www.chess.com/tactics/server.html?id=239991 double attack

91 http://www.chess.com/tactics/server.html?id=392853 double attack

90 http://www.chess.com/tactics/server.html?id=301645 hanging piece/ defense

89 http://www.chess.com/tactics/server.html?id=114295 fork simple

88 http://www.chess.com/tactics/server.html?id=334537 defense

87 http://www.chess.com/tactics/server.html?id=75903 hanging piece (hard)

86 http://www.chess.com/tactics/server.html?id=293565 mate in 3+ with a nice variation

85 http://www.chess.com/tactics/server.html?id=111118 skewer

84 http://www.chess.com/tactics/server.html?id=257927 queen exchange for winning endgame

83 http://www.chess.com/tactics/server.html?id=158292 backrank

82 http://www.chess.com/tactics/server.html?id=438423 discovered attack

81 http://www.chess.com/tactics/server.html?id=138761 hanging piece

80 http://www.chess.com/tactics/server.html?id=400367 pin

79 http://www.chess.com/tactics/server.html?id=109136 defence

78 http://www.chess.com/tactics/server.html?id=284487 vulnerable king

77 http://www.chess.com/tactics/server.html?id=429305 pin

76 http://www.chess.com/tactics/server.html?id=460179 hanging piece with check for tempo

75 http://www.chess.com/tactics/server.html?id=144458 fork /double attack

74 http://www.chess.com/tactics/server.html?id=465287 backrank overloading (only 1 move but a nice puzzle)

73 http://www.chess.com/tactics/server.html?id=335319 simple hanging piece/ defence

72 http://www.chess.com/tactics/server.html?id=113282 pawn promotion

71 http://www.chess.com/tactics/server.html?id=60406 remove the defender

70 http://www.chess.com/tactics/server.html?id=307707 remove the defender

69 http://www.chess.com/tactics/server.html?id=164586 remove the defender

68 http://www.chess.com/tactics/server.html?id=258137 pin. problem extended

67 http://www.chess.com/tactics/server.html?id=166452 easy fork

66 http://www.chess.com/tactics/server.html?id=113114 double threat

65 http://www.chess.com/tactics/server.html?id=394393 with entertaining diagram added

64 http://www.chess.com/tactics/server.html?id=79470 fork

 63 http://www.chess.com/tactics/server.html?id=383921 smothered type problem

62 http://www.chess.com/tactics/server.html?id=459303 simple knight tactics with diagram to show alternate lines

61 http://www.chess.com/tactics/server.html?id=83072 zwishenzug

60 http://www.chess.com/tactics/server.html?id=286233 m8 (deleted)

59 http://www.chess.com/tactics/server.html?id=250865 simple fork

58 http://www.chess.com/tactics/server.html?id=308147 remove the defender

57 http://www.chess.com/tactics/server.html?id=232859 discovered attack

56 http://www.chess.com/tactics/server.html?id=191014 simple fork

55 http://www.chess.com/tactics/server.html?id=177304 defensive tactics

54 http://www.chess.com/tactics/server.html?id=461883 nice sacrificial attack/ probably my favourite - altered to allow wonderful ending

53 http://www.chess.com/tactics/server.html?id=358585 ?tactic

52 http://www.chess.com/tactics/server.html?id=428755 Discovered attack

51 http://www.chess.com/tactics/server.html?id=387627 pawn promotion

From the approver pool

50 http://www.chess.com/tactics/server.html?id=322345 pin

49 http://www.chess.com/tactics/server.html?id=411747 ?name of tactic

48 http://www.chess.com/tactics/server.html?id=114553 pawn promotion

47 http://www.chess.com/tactics/server.html?id=399389 trapped piece

46 http://www.chess.com/tactics/server.html?id=366731 double attack

45 http://www.chess.com/tactics/server.html?id=265635 double attack

44 http://www.chess.com/tactics/server.html?id=127723 double attack

43 http://www.chess.com/tactics/server.html?id=465617 pin

42 http://www.chess.com/tactics/server.html?id=463177 fork

41 http://www.chess.com/tactics/server.html?id=66689 double attack/ skewer

40 http://www.chess.com/tactics/server.html?id=210245 double attack

39 http://www.chess.com/tactics/server.html?id=342187 remove the defender. problem extended 20June2012 - rating before the change 2050

38 http://www.chess.com/tactics/server.html?id=375261 deflection

37 http://www.chess.com/tactics/server.html?id=220619 pin

36 http://www.chess.com/tactics/server.html?id=268041 double attack

35 http://www.chess.com/tactics/server.html?id=74238 check for tempo

34 http://www.chess.com/tactics/server.html?id=428843 mate in 8 or perpetual check - edited to provide unambiguous second move which also gives black a chance of mate

33 http://www.chess.com/tactics/server.html?id=449085 only 1 move but TT needs more defensive problems

32 http://www.chess.com/tactics/server.html?id=358179 nice queen pin

31 http://www.chess.com/tactics/server.html?id=279059 simple double attack

30 http://www.chess.com/tactics/server.html?id=396569 simple mate in 5

29 http://www.chess.com/tactics/server.html?id=270513 simple skewer

28 http://www.chess.com/tactics/server.html?id=70312 not sure what to motif to describe this one, but its still fun

27 http://www.chess.com/tactics/server.html?id=123422 clearance to allow queen/king skewer. not ideal problem as second best move still winning

26 http://www.chess.com/tactics/server.html?id=177641 vulnerable king with a tricky second move

25 http://www.chess.com/tactics/server.html?id=148768 simple pawn promotion

24 http://www.chess.com/tactics/server.html?id=123513 endgame tactics

23 http://www.chess.com/tactics/server.html?id=192254 vulnerable king

22 http://www.chess.com/tactics/server.html?id=115161 remove defender (shortened to remove other winning lines)

21 http://www.chess.com/tactics/server.html?id=133367 trapped piece

20 http://www.chess.com/tactics/server.html?id=117179 weak king

19 http://www.chess.com/tactics/server.html?id=50750 (became corrupt so re-approved as http://www.chess.com/tactics/server?id=184755 )simplification

18 http://www.chess.com/tactics/server.html?id=154301 fork

17 http://www.chess.com/tactics/server.html?id=129803 overloading

16 http://www.chess.com/tactics/server.html?id=72282 double attack

15 http://www.chess.com/tactics/server.html?id=163751 vulnerable king (last move altered to provide satisfying Q+N mate, and prevent ambiguity)

14 http://www.chess.com/tactics/server.html?id=157970 pin, pawn promotion (easy to miss)

13 http://www.chess.com/tactics/server.html?id=126257 vulnerable king (nice combination)

12 http://www.chess.com/tactics/server.html?id=179848 pin (although 18Rxe6? is still winning it is so obviously bad that I felt it ok to include the problem)

11 http://www.chess.com/tactics/server.html?id=75006 pin / fork

10 http://www.chess.com/tactics/server.html?id=147566 double attack

9 http://www.chess.com/tactics/server.html?id=153565 queen trap

8 http://www.chess.com/tactics/server.html?id=92485 check to gain tempo

7 http://www.chess.com/tactics/server.html?id=141263 multiple mating threats

6 http://www.chess.com/tactics/server.html?id=162602 Legall type position

5  http://www.chess.com/tactics/server.html?id=171928 double attack

4  http://www.chess.com/tactics/server.html?id=162511 fork

3 http://www.chess.com/tactics/server.html?id=121508 discovered attack

2 http://www.chess.com/tactics/server.html?id=55260 vulnerable king

1 http://www.chess.com/tactics/server.html?id=71799 double attack

I'm one of the moderators. This is my way of keeping track of the puzzles.

how do you know when a tactics problem is taken from one of your games? does chess.com notify you?