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CURIOUSER AND CURIOUSER  (19 october 2007)

What if your opponent in a game of chess still has his queen -- while you are left with nothing but your king?

Most of us would resign, or wouldn't you? But if you'd play against Fritz-one-ply, you'd better not! Wanna know why? Just have a look at the following game:

Game 1: Fritz unable to checkmate

White: Fritz 8 (1 ply)

Black: GO 1650 L (± 10 seconds / move)

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nf3 Be6 8. O-O d5 9. exd5 Nxd5 10. Ne4 Rc8 11. c3 Bf5 12. Bd3 Bxe4 13. Bxe4 Nde7 14. Qa4 f6 15. Qb3 Na5 16. Qe6 Nac6 17. Be3 Rc7 18. Rad1 Rd7 19. Nd2 Rd6 20. Qb3 Qc8 21. f4 exf4 22. Rxf4 g5 23. Bc5 Rxd2 24. Rxf6 Rxd1+ 25. Qxd1 g4 26. Qb3 h6 27. Qf7+ Kd8 28. Qxf8+ Rxf8 29. Rxf8+ Kd7 30. Rxc8 Kxc8 31. Kf2 Kd7 32. Kg3 Ne5 33. Bxb7 a5 34. b4 a4 35. b5 Nf5+ 36. Kf4 Nd3+ 37. Kxf5 Nxc5 38. Bc6+ Kd6 39. Kxg4 Nd3 40. Kf5 Kc5 41. Be4 Nc1 42. b6 Kxb6 43. a3 Kc5 44. g4 Ne2 45. g5 hxg5 46. Kxg5 Nxc3 47. Kf5 Nb5 48. h4 Nxa3 49. h5 Nc4 50. h6 a3 51. h7 Nd6+ 52. Ke6 Nxe4 53. h8Q Ng5+ 54. Kf5 Nf7 55. Qc3+ Kb5 56. Qb3+ Kc5 57. Qxf7 Kb4 58. Qd5 Kc3 59. Ke4 Kb4 60. Kd3 a2 61. Qxa2 Kc5 62. Qe6 Kb5 63. Kc3 Kc5 64. Kb3 Kd4 65. Qd6+ Ke4 66. Qd7 Kf4 67. Qe6 Kf3 68. Ka4 Kf4 69. Qe7 Kf3 70. Qd6 Ke4 71. Qd7 Ke5 72. Qd2 Ke4 73. Qd6 Ke3 74. Ka5 Ke4 75. Qd7 Ke5 76. Qc6 Kd4 77. Qe6 Kd3 78. Ka4 Kd4 79. Qe7 Kc4 80. Qe6+ Kd4 81. Kb4 Kd3 82. Ka5 Kd4 83. Qe7 Kc4 84. Qe6+ Kd4 85. Ka4 Kd3 86. Kb4 Kd4 87. Qd6+ Ke4 88. Qd7 Ke5 89. Qe7+ Kd4 90. Kb5 Kd5 91. Qc5+ Ke4 92. Qd6 Ke3 93. Ka4 Ke4 94. Ka5 Ke3 95. Kb5 Ke4 96. Qe6+ Kd4 97. Qd6+ Ke4 98. Qd7 Ke3 99. Qd5 Kf4 100. Qc5 Ke4 101. Qc4+ Ke5 102. Qc5+ Kf4 103. Ka4 Ke4 104. Qc4+ Ke5 105. Qc5+ Ke4 106. Qe7+ Kd3 107. Qe5 Kc4 108. Qf5 Kd4 109. Qg5 Kc4 110. Qf4+ Kc3 111. Qd6=

An animation of this game can be seen if you have Java installed on your computer.

After  Fritz had made fifty aimless moves, GO1650 still seemed perfectly willing to go on for at least 1650 moves (hence perhaps its name?), but Fritz announced a draw because of the fifty-move rule.

GO1650

This game, which clearly showed Fritz-one-ply is unable to checkmate with king-and-queen against king-alone, was played while I was in the process of making the moves of about three hundred games between all the exhibits of the Overtom Collection and Fritz-one-ply .

Game 2: illegal castling by Boris

Another surprising game in this series was one, in which quaint-looking Boris was involved:

White: Fritz 8 (1 ply)

Black: Boris (± 10 seconds / move)

1. e4 e5 2. Bc4 Nf6 3. d3 d5 4. exd5 Nxd5 5. Nf3 Nf4 6. Bxf7+ Kxf7 7. Nxe5+ Ke8 8. Bxf4 Bb4+ 9. Nc3 Bxc3+ 10. bxc3 O-O

Een animatie van deze partij is te zien als u Java op de computer heeft.

Although his king had already moved, Boris had the nerve to castle!

Boris

Needless to say Fritz refused to co-operate with this rather obvious ploy!

Game 3: Fritz loses a queen, gets a winning game and ...

In a game against an ancient Tandy computer, Fritz demonstrated that one-ply can be a handicap and lost his queen against this weakling.

"Tandy Computerized Chess Game"

Seventeen moves later, Fritz had the chance to take revenge and win his opponent's queen with 36. Bd6, but decided to capture a pawn instead.

But believe it or not: Fritz got a second chance. The Tandy computer did not realize how dangerous its position was and unwarily captured a pawn on the same deadly diagonal.

This time, Fritz woke up and pounded on the poor queen.

In the first game, we saw Fritz's inability to checkmate a lonely king with king-and-queen. Would Fritz be able to checkmate this time?

White: Fritz 8 (1 ply)

Black: Tandy Computerized Chess (± 10 seconds / move)

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qe5+ 4. Be2 Nc6 5. Nf3 Qc5 6. d4 Qb6 7. O-O Bf5 8. d5 O-O-O 9. Re1 Nf6 10. Bb5 Nxd5 11. Qe2 e6 12. Nxd5 Rxd5 13. c4 Bd3 14. Qe3 Bc5 15. Qd2 Bxc4 16. Bxc4 Rxd2 17. Nxd2 Bxf2+ 18. Kf1 Bxe1 19. Kxe1 Qg1+ 20. Nf1 Qxg2 21. Bd3 Qd5 22. Be2 e5 23. Be3 f6 24. Ng3 Qa5+ 25. Kf2 Qb4 26. b3 Qh4 27. Rh1 e4 28. h3 f5 29. a3 f4 30. Bg4+ Kd8 31. Rd1+ Ke8 32. Bxf4 h5 33. Bd7+ Kf8 34. Bxc7 g6 35. Ke3 Qe7 36. Nxe4 Qxa3 37. Bd6+ Qxd6 38. Nxd6 g5 39. Nxb7 Ne5 40. Nc5 Nxd7 41. Rxd7 a6 42. Ne6+ Ke8 43. Rd8+ Kf7 44. Rxh8 Kxe6 45. Rh6+ Ke5 46. Rxa6 g4 47. Ra5+ Ke6 48. Rxh5 gxh3 49. Rxh3 Kf7 50. b4 Kg6 51. b5 Kf6 52. b6 Ke6 53. b7 Kd6 54. b8=Q+ Kc6 55. Rh7 Kd5 56. Qb5+ Ke6 57. Qb7 Kf6 58. Qc7 Kf5 59. Qd7+ Ke5 60. Rh6=

Een animatie van deze partij is te zien als u Java op de computer heeft.

Although checkmating with king and queen is beyond his capabilities, Fritz would probably be able to checkmate with king, rook and queen. But lo and behold: Fritz managed to stalemate his opponent and the game was drawn !

Well, from now on, if anyone claims playing chess games between computers is a dull and boring activity, we know better, don't we?

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