Computers are known for a few traits that can be exploited.

1. They are incredibly materialistic:

If you can use a gambit or a clever sacrifice the computer will likely take unless there is an obvious repercussion

2. Computers play in a logical manner

The computer will not play for position, rather it will attack specific pieces and will attack your king. Even the best of computers have no concept of position.

3. Be careful: don't make mistakes, the computer will see them. Take that extra second or two to ensure that you haven't made a ?, ?! or ??

Here is an example of one of my games beating the computer. Please post your games against the Medium and Hard computers so we can all analyze them :).

Well played game. I tried, but couldn't figure out how to set up a live rated game against the computer. I see others in the window playing against it, but I don't know how they set up the game.

The computer just sits there and waits for a challenge, you simply have to be the first to click.

good game, but Nc5 on turn 16?? that's pretty stupid for a 1700+ computer

the 1700 just means that it keeps beating ppl that mess up. And like i said, it has no positional theory, backwards moves make more sense than gaining momentum, he doesn't like to be chased around ;)

Which computer program was this and from which company? And to followup--have you played against the Fritz series of computer progams, i.e Fritz 6, Fritz 11(Rybka) or Fritz 12(Shredder)?.

Here are 4 brain busters C to C, I would like to know what you would have done differently:

Chessmater GM Edition {Steintz} Goes Bust in 48!
[White "Steinitz"]
[Black "Fritz 6"]
[Result "0-1"]
King's Gambit Accepted

1. e4 e5 
2. f4 exf4 
3. Nf3 g5 
4. h4 g4 
5. Ne5 h5 
6. Bc4 Nh6 
7. d4 d6 
8. Nd3 f3 
9. gxf3 Be7 
10. Be3 Bxh4+ 
11. Kd2 Nc6 
12. Nc3 Na5 
13. Bb3 c6 
14. Qg1 Ng8 
15. Qh2 Bg5 
16. f4 Bf6 
17. f5 Nxb3+ 
18. axb3 h4 
19. Qg2 g3 
20. Rhf1 Nh6 
21. Qf3 Bg5 
22. Rfe1 Qf6 
23. d5 Bxe3+ 
24. Kxe3 Qg5+ 
25. Ke2 Ng4 
26. Red1 Rg8 
27. dxc6 bxc6 
28. b4 d5 
29. exd5 Bxf5 
30. Rf1 Bg6 
31. dxc6 Nh2 
32. Qf4 Nxf1 
33. Qxg5 Bxd3+ 
34. cxd3 Rxg5 
35. Kxf1 O-O-O 
36. Rxa7 h3 
37. Ne2 g2+ 
38. Kg1 Re5 
39. Kh2 Rxe2 
40. Ra1 Rf2 
41. Kxh3 Rh8+ 
42. Kg3 Rf6 
43. Kg4 Rf1 
44. Ra8+ Kc7 
45. Ra7+ Kd6 
46. Rd7+ Kxc6 
47. b5+ Kxd7 
48. b6 g1=R# 
0-1

Chessmater GM Edition [Evans L.] Cracks Under the Strain
[White "Evans"]
[Black "Fritz 6"]
[Result "0-1"]
Dutch Reversed

1. f4 d5 
2. e3 Bf5 
3. Nf3 e6 
4. Be2 Nc6 
5. O-O Qf6 
6. Nc3 O-O-O 
7. d3 Nh6 
8. a3 Kb8 
9. d4 Ka8 
10. Bd2 Rg8 
11. Bb5 Ne7 
12. Ne5 Ng6 
13. Be2 c6 
14. Rc1 Nxe5 
15. fxe5 Qe7 
16. Be1 Bg6 
17. Qd2 Nf5 
18. g4 Nh6 
19. h4 f5 
20. g5 Ng4 
21. Bg3 Bh5 
22. Bf3 h6 
23. Bf4 Qe8 
24. Bg2 Be7 
25. Na4 Qg6 
26. Nc5 Bxc5 
27. dxc5 Rh8 
28. Qd4 Rb8 
29. c4 Qh7 
30. b4 hxg5 
31. Bxg5 Nh6 
32. cxd5 exd5 
33. b5 Qg8 
34. b6 a6 
35. Bxh6 gxh6 
36. Rxf5 Bg6 
37. Rf2 Be4 
38. Kf1 Qg4 
39. Bxe4 dxe4 
40. Rf4 Qh3+ 
41. Ke1 Qg3+ 
42. Ke2 Qg2+ 
43. Rf2 Qg4+ 
44. Ke1 Rhd8 
45. Qb2 Rd3 
46. Qe2 Qg1+ 
47. Rf1 Qg3+ 
48. Qf2 Rxe3+ 
49. Kd2 Rd8+ 
50. Kc2 Rc3+ 
51. Kb2 Rb3+ 
52. Ka2 Rxa3+ 
53. Kb1 Qd3+ 
54. Qc2 Qb5+ 
55. Qb2 Rb3 
56. Qxb3 Qxb3+ 
57. Ka1 e3 
58. e6 Qxe6 
59. Rcd1 Re8 
60. Rc1 e2 
61. Rg1 Rd8 
62. Kb2 Rd2+ 
63. Rc2 Qe5+ 
64. Kb3 Qd5+ 
65. Kb2 Qd4+ 
66. Kb1 Qxg1+ 
67. Kb2 Qd4+ 
68. Kb3 Rd3+ 
69. Ka2 Qa4+ 
70. Kb1 Rd1+ 
71. Kb2 Qb4+ 
72. Ka2 e1=Q 
73. Rc1 Rd2+ 
74. Rc2 Qeb1# 
 0-1

Chessmater GM Edition [Evans L.] This one takes the cake!!
[White "Evans"]
[Black "Fritz 6"]
[Result "0-1"]
[Event ""]
Petroff's Defence

  1. e4             e5           
  2. Nf3            Nf6          
  3. Nxe5           d6           
  4. Nf3            Nxe4         
  5. c4             Be7          
  6. d4             d5           
  7. Bd3            Bb4+         
  8. Kf1            O-O          
  9. Qb3            a5           
 10. cxd5           Nf6          
 11. a3             Bd6          
 12. Nc3            Nbd7         
 13. Bg5            h6           
 14. Bh4            Re8          
 15. Bb5            g5           
 16. Nxg5           hxg5         
 17. Bxg5           Qe7          
 18. Qd1            b6           
 19. Kg1            Kg7          
 20. h4             Qf8          
 21. Bc6            Rb8          
 22. Qf3            Qh8          
 23. h5             Kf8          
 24. Rh4            Ba6          
 25. Qf5            Re7          
 26. h6             Rbe8         
 27. Bd2            Qh7          
 28. Qxh7           Nxh7         
 29. b3             Kg8          
 30. Rh3            Nhf6         
 31. Rf3            Kh7          
 32. a4             Bc8          
 33. Rc1            Ba3          
 34. Rf1            Ba6          
 35. Rb1            Bb4          
 36. Rc1            Bc8          
 37. Bb5            Bxc3         
 38. Rcxc3          Nxd5         
 39. Rc1            Rg8          
 40. Bd3+           Kh8          
 41. Rf5            N7f6         
 42. Rg5            Rge8         
 43. f3             Be6          
 44. Bb5            Rd8          
 45. Re5            Nd7          
 46. Ree1           Nf8          
 47. g3             Ng6          
 48. Bd3            Kh7          
 49. Bg5            f6           
 50. Bd2            Rd6          
 51. Bb1            Rf7          
 52. Rc2            Bf5          
 53. Rxc7           Nxc7         
 54. Bxf5           Rxd4         
 55. Be3            Rb4          
 56. Rb1            Nd5          
 57. Bd2            Rd4          
 58. Rb2            Ne7          
 59. Be6            Rf8          
 60. Kg2            Rd6          
 61. Bh3            Re8          
 62. Kf2            Ne5          
 63. Ra2            Kg6          
 64. Rc2            Red8         
 65. Be3            Nd5          
 66. Bd2            Nb4          
 67. Bxb4           Nd3+         
 68. Kg1            Nxb4         
 69. Rf2            Kxh6         
 70. Bf1            Rd1          
 71. Rh2+           Kg5          
 72. Rf2            Nd3          
 73. Re2            f5           
 74. Re6            f4           
 75. g4             Rc8          
 76. Rd6            Rcc1         
 77. Rd5+           Kf6          
 78. Rd6+           Ke5          
 79. Kg2            Ne1+         
 80. Kh3            Rxd6         
 81. g5             Rc8          
 82. Kg4            Rh8          
 83. Bc4            Nc2          
 84. b4             Ne3#         
 0-1

Chessmater GM Edition [White "Seirawan"]Now this really takes the cake!!
[Black "Fritz 6"]
[Result "0-1"]
Dutch Reversed
  1. f4             d5           
  2. e3             Nf6          
  3. Nf3            Bg4          
  4. Be2            c6           
  5. O-O            e6           
  6. b3             Bd6          
  7. Bb2            O-O          
  8. Nc3            Bxf3         
  9. Bxf3           Re8          
 10. Qe1            e5           
 11. f5             Na6          
 12. Qh4            Nc5          
 13. Rad1           d4           
 14. exd4           exd4         
 15. Nb1            d3           
 16. Bxf6           Qxf6         
 17. Qxf6           gxf6         
 18. c3             Nd7          
 19. Bh5            Re4          
 20. g3             Rae8         
 21. c4             Kg7          
 22. Nc3            R4e7         
 23. Kh1            Kh6          
 24. Bg4            Kg5          
 25. Bf3            h5           
 26. Rc1            Bc5          
 27. h3             Bd6          
 28. Kg2            h4           
 29. g4             Bf4          
 30. Rcd1           Bg3          
 31. Rh1            Bd6          
 32. Rc1            a6           
 33. Rhf1           a5           
 34. Rcd1           Bc5          
 35. Kh1            Bb4          
 36. Rc1            Nc5          
 37. Kg2            Na6          
 38. Kg1            Bc5+         
 39. Kh1            Ba3          
 40. Rcd1           Bb2          
 41. Na4            Bd4          
 42. Nc3            Nb4          
 43. a4             Re2          
 44. Nxe2           dxe2         
 45. Bxe2           Rxe2         
 46. Rde1           Re5          
 47. Rxe5           fxe5         
 48. Kg2            Nd3          
 49. Kf3            Nc5          
 50. Rb1            e4+          
 51. Kg2            Nd3          
 52. Kh1            Bf2          
 53. Kg2            Be1          
 54. Kf1            Bxd2         
 55. Ke2            Bc1          
 56. Kd1            Kf4          
 57. Ke2            f6           
 58. b4             axb4         
 59. Kd1            Kg3          
 60. Rxc1           Nxc1         
 61. g5             e3           
 62. gxf6           e2+          
 63. Ke1            Kf3          
 64. Kd2            Nb3+         
 65. Ke1            Ke3          
 66. f7             Nd4          
 67. a5             Nf3#         
 0-1

If you look at the title of the thread it says "live chess...." This isn't an instruction manual on how to defeat Deep Blue. Although, the part about machines being incredibly materialistic came in handy for Kaspy. He sacrificed a pawn and deep blue made a MISTAKE. Unfortunately our human hero failed to recognize the mistake and lost instead of drew.

If you used Chessmaster in these matches, then you should know that no matter which personality you use in Chessmaster, it's always the same engine, named "The King". Considering those personalities as accurate representations of the Grandmasters is a big mistake.

I've seen games before where IMs and FMs and even GMs will choose a different move than a computer. At first the computer will analyze the position to show that move as an error but 10 moves later it turns out to be just as effective but not as sharp. Its just a different way of approaching the problem.