Author: Mike Hood
Date: 20:59:51 01/21/04
Go up one level in this thread
On January 21, 2004 at 19:59:31, Rory Nolan wrote: >On January 21, 2004 at 17:21:52, Kolss wrote: > >>On January 21, 2004 at 17:02:30, Mike Hood wrote: >> >>>Here's a small example of "perfect play" using the KRPP-KR tablebase. It's not >>>the only path that leads to mate, there are a few possible branches along the >>>way, but there are no shorter paths. How many engines playing black without >>>6-piece EGTBs could get a win against an engine playing white with 6-piece >>>EGTBs? Not many, if any. Take a look >>> >>>[D] 3R4/6k1/8/6p1/7p/2r5/7K/8 b - - 0 63 >>> >>>63...Kg6 64. Rh8 Kf5 >>>65. Rf8+ Kg4 66. Rd8 Rc2+ 67. Kg1 h3 68. Rd4+ Kg3 69. Rd3+ Kh4 70. Rd8 g4 71. >>>Rd4 Kg3 72. Rd3+ Kf4 73. Rd4+ Kf3 74. Rd3+ Ke4 75. Rd8 g3 76. Re8+ Kf4 77. Rf8+ >>>Ke5 78. Re8+ Kf6 79. Re1 Kg5 80. Rd1 Rf2 81. Rd5+ Kg4 82. Rd4+ Rf4 83. Rd2 h2+ >>>84. Kg2 Rf2+ 85. Rxf2 gxf2 86. Kxf2 h1=Q 87. Ke3 Qd5 88. Ke2 Kf4 89. Kf1 Qa2 >>>90. Ke1 Ke3 91. Kd1 Qb1# >> >>Hi, >> >>I do not have any 6-piece TB - is Kg6 the only winning move in this position (or >>does e.g. Kh6 or a rook move along the rank win as well)? Maybe you could give a >>listing of all possible moves with the respective evaluation?! >> >>Best regards - Munjong. >New game >3R4/6k1/8/6p1/7p/4r3/7K/8 w - - 0 1 > >Analysis by Tablebase 3.0: > >1. -+ (-#29): 1.Kg2 >2. -+ (-#29): 1.Rc8 >3. -+ (-#29): 1.Rb8 >4. -+ (-#29): 1.Ra8 >5. -+ (-#29): 1.Rd6 >6. -+ (-#28): 1.Kg1 >7. -+ (-#28): 1.Kh1 >8. -+ (-#28): 1.Rd7+ >9. -+ (-#28): 1.Rd5 >10. -+ (-#28): 1.Rd4 >11. -+ (-#28): 1.Rd2 >12. -+ (-#28): 1.Rd1 >13. -+ (-#9): 1.Re8 >14. -+ (-#8): 1.Rd3 >15. -+ (-#8): 1.Rf8 >16. -+ (-#8): 1.Rg8+ >17. -+ (-#8): 1.Rh8 > >(Nolan, 22.01.2004) It's black's move :) But it isn't just a matter of finding the first move. Can an engine playing black without 6-piece EGTBs fid ALL the correct moves? Or will it make a mistake and fall into a drawn position?
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