hessmaster 2nd puzzle. It needed a few alterations to remove advantageous alternatives.
78th puzzle http://www.chess.com/tactics/server.html?id=468499
3rd puzzle is ambiguous. 1.Bg4 (+5)
Puzzles needed for tactics trainer
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You might of all guessed there is a limit to how fast I can look at your submissions particularly if I have to work on a problem to remove ambiguous lines or allow a problem to continue far enough.
There will be times when I can't look at puzzles for 2weeks or more. I also need to spend more time studying openings etc. I look at each submission in turn so you can tell which one I'm working on by looking at my last post.
Perhaps the more experienced submitters could help those just starting by looking at their puzzles and sending them private messages with improvements to allow the original submission to be edited (or even deleted) before I get to it, and let me know in a message so I can wait for the edited version to appear. If you edit your post, please thank whoever helped you. Don't add a new post because I won't see it until it is too late. Keeping the thread uncluttered will help speed me up by not having to search through extra pages.
I shall spend less time explaining why a puzzle doesn't work and rely on others to answer questions, as there are now many of you capable of answering questions on ambiguity, conclusiveness etc. If the number of submissions continues to grow as it is, I will need help to make the TT problems. I would hope that some of those on this thread would be allowed to become an approver like me (and probably be a lot better at it). If you have successfully submitted at least 7 puzzles which required a minimum of alteration by me, and have shown your ability to help others, then send me a private message, and I could send a recommendation for you to become an approver (no promises).
Najdorf,
Thankyou for these 3 submissions. I learnt a lot looking at them. They are very educational. It is a real shame I couldn’t see how to make them work as TT puzzles. I tend to delete/move pieces only when my limited tactical ability can see an easy way of removing ambiguous lines.
Nice little 3 mover : the first move is too easy. The hardest moves of a problem should ideally be at the start. The second move would be a good start for a puzzle but it doesn’t have a conclusive continuation (white can’t be allowed to be mated so easily).
Dragon puzzle : 4.Nd5 has 4.gxh5 as a winning alternative so unfortunately the puzzle can’t continue to a conclusive finish. 3…Rxf8 also has a choice of winning moves for white. Remember no alternative better than 0-3-1.0, ideally <0.3.
G75 puzzle : unfortunately 5.Nd5 has winning alternatives. The alternatives must be given a value by Houdini of less than 1 for puzzles I’m looking for.
katonas,
I just created a self-composed problem. I edited MANY lines and removed all alternative lines.
I haven't analyzed it using any engine, but I feel a mate doesn't have to be analyzed if it's forced and the quickest.
Or am I missing something really important?
modification of one of my games:
a sideline of one of my games:
sideline of the previous one:
nyLsel, thankyou for a nice endgame puzzle. It has to start 1 move later as Ng5 is mate in 4.
79th puzzle http://www.chess.com/tactics/server.html?id=198391
The reverse puzzle is ambiguous as 1.Nc5 is mate in 7
Please try to start your puzzles with the computer move.
Corrected by shoopi, my last puzzle stands like this:
shoopi pointed out that the Rook at h6 could make the Rook's discovered check forced and removing the pawn from d5 really finishes all other chances; black can't defend the Bishop's check with that pawn anymore.
Thanks for the correction, shoopi.
katonas, you have the puzzle now.
Another puzzle:
Thankyou edvinj,
Black's 48th http://www.chess.com/echess/game.html?id=30031245
80th puzzle http://www.chess.com/tactics/server.html?id=239275
White's 33rd, http://www.chess.com/echess/game.html?id=31575909 with a pawn added on e2
81st puzzle http://www.chess.com/tactics/server.html?id=426763
Unfortunately http://www.chess.com/echess/game.html?id=41809413 can't continue beyond move 17 so it isn't conclusive enough.
Black's 38th puzzle, unfortunately it can't continue beyond 1 move
continuation puzzle from above
82nd puzzle http://www.chess.com/tactics/server.html?id=295219
For the last game removing the c4 pawn removes any ambiguity, and the puzzle is conclusive as you said.
83rd puzzle http://www.chess.com/tactics/server.html?id=272583
Jul 15, 2012
0
#232
Hi katonas, that's a very nice variation you found in
http://www.chess.com/tactics/server.html?id=295219
I guess the Rb3 move must be very hard to find.
From reading your post I am not sure you looked at my original submission correctly though. I was thinking of starting it one half move later, and seeing it from whites perspective. Or perhaps you just thought the c7 move was just to trivial. Anyways, thanks for adding the problems.
Perhaps this might work. Haven't checked it with an engine...
I will post the game as soon as possible. Meanwhile here is another one:
Please bear in mind that the grades are ecf!
edvinj wrote:
Hi katonas, that's a very nice variation you found in
http://www.chess.com/tactics/server.html?id=295219
I guess the Rb3 move must be very hard to find.
From reading your post I am not sure you looked at my original submission correctly though. I was thinking of starting it one half move later, and seeing it from whites perspective. Or perhaps you just thought the c7 move was just to trivial. Anyways, thanks for adding the problems.
The puzzle was ambiguous with Qc1! a winning alternative to c7. Please use an engine to check for alternative winning lines when submitting puzzles.
Unfortunately I don't think this puzzle is conclusive enough to make it into a TT problem.
The original problem could be made unambiguous by removing the e5 pawn but as you said, e7 isn't very challenging.
Thankyou hessmaster (kirtley game)
Although this is a nice example of this tactical motif I'm not sure if I can approve this problem. I shall ask another approver.
Approved
84th puzzle http://www.chess.com/tactics/server.html?id=317781
Metaknight 251 the puzzle has multiple alternative winning lines and so is ambiguous.
Strategic play (self composed problem) - there are several moves stronger than 2.Qg7+ after 1...f5. Mate isn't forced as after 4.Rg6+ d4 only gives white a +3.27 advantage
Please note I'm being very strict regarding alternative advantageous lines. I will reject even a mate in 1 move if the next best move is given a value above +1 , or mate in any number of moves by an engine.
Jul 16, 2012
0
#238
Potential .. just analysing the game:
[White "Lympathy"]
[Black "bharatkumargupta1"]
[Result "1-0"]
[FEN "1k1r2nr/1p1qb1p1/4p2p/1P1p4/1Q1P4/5NP1/2P2P1P/R1B2RK1 w - - 0 19"]
http://live.chess.com/live?v=20120709#a=5168
katonas,
I posted an edit (post #275) after the original one, to remove the d4 variation and even force Rg6+.
Please check that if you haven't yet.
If required, I'll delete the original one.
StrategicPlay,
2.Qg7+ (mate in 4) has 2.Re1 (+4.88) as a winning alternative
5.Bxf6# has Rxh6 (+7.97) or Rxf6 (5.51)
However the 2.Re1 line provides a tough problem
removing the f2 pawn makes Qxg7 less advantageous...
85th puzzle http://www.chess.com/tactics/server.html?id=343183
Hi, here's a few more. Not all that spectacular perhaps, but maybe still useful.
Black's 48th http://www.chess.com/echess/game.html?id=30031245
Possibly continuing with 49..Rb6 50 Rxa7 b2 51 Ra8+
White's 33rd, http://www.chess.com/echess/game.html?id=31575909
White's 16th, http://www.chess.com/echess/game.html?id=41809413
Black's 38th, http://www.chess.com/echess/game.html?id=20464595
Black's 12th, http://www.chess.com/echess/game.html?id=48980462
In the last one, the difference isn't quite 2.5 compared with the second move, but white wins a piece, and I think it is clear there's no other line that gives an immediate advantage.