Author: blass uri
Date: 09:08:58 07/16/98
Go up one level in this thread
On July 16, 1998 at 10:35:17, Dan Homan wrote: >On July 15, 1998 at 07:35:10, blass uri wrote: > >> >>On July 14, 1998 at 11:59:33, blass uri wrote: >> >>>the position >>>7r/1k2P2P/4p3/1pp5/8/2pp4/1n3PP1/R4K1R >>>white to play >>>white should play g4 >>>but computers like e8=Queen Rxe8 h8=Queen Rxh8 Rxh8 and >>>I think that black is winning instead of losing >>> >>>can a computer program find g4 in a reasonable time >>>or all of them are stupid and do not understand that the white pawns h7 g6 are >>>stronger than a rook >>> >>>Uri >>Junior needed near 10 hours to find g4 >>I think fritz is not better >>computer programs do not understand that knight and passed pawns are >>better than a 2 rooks >> > >Here is the output of my amateur program, EXchess. It finds g4 in about >6 seconds on a slow machine. Although the score stays negative for quite >some time, it does steadily increase. I have put very little work into the >passed pawn code, so I am not sure if finding this move is more than just >dumb luck. > > - Dan > >White-To-Move[1]: setboard 7r/1k2P2P/4p3/1pp5/8/2pp4/1n3PP1/R4K1R w >White-To-Move[1]: display > > +---+---+---+---+---+---+---+---+ >8 | | | | | | | || White to move > +---+---+---+---+---+---+---+---+ >7 | || | | P | | | P | castle: - > +---+---+---+---+---+---+---+---+ >6 | | | | || | | | > +---+---+---+---+---+---+---+---+ >5 | ||| | | | | | > +---+---+---+---+---+---+---+---+ >4 | | | | | | | | | fifty: 0 > +---+---+---+---+---+---+---+---+ >3 | | ||| | | | | Computer time: 30 seconds > +---+---+---+---+---+---+---+---+ >2 | || | | | P | P | | > +---+---+---+---+---+---+---+---+ >1 | R | | | | | K | | R | > +---+---+---+---+---+---+---+---+ > a b c d e f g h > >White-To-Move[1]: analyze >Analysis mode: Enter commands/moves as ready. > > 1. ++ 0 2 1. e8=Q > 1. -556 0 14 1. g3 > 1. -499 0 15 1. g4 > 1. -499 0 36 1. g4 > 2. -- > 2. -546 0 425 1. g4 b4 > 2. -540 0 706 1. Re1 Kc6 > 2. -540 0 763 1. Re1 Kc6 > 3. ++ 0 859 1. Re1 > 3. -493 0 1163 1. e8=Q Rxe8 2. h8=Q > 3. -493 1 2173 1. e8=Q Rxe8 2. h8=Q > 4. ++ 1 2343 1. e8=Q > 4. -468 1 2463 1. e8=Q Rxe8 2. Ra7+ Kxa7 > 4. -453 1 10558 1. Ra3 c2 2. Rc3 Kc6 3. g4 > 4. -453 1 12178 1. Ra3 c2 2. Rc3 Kc6 3. g4 > 5. -477 1 17598 1. e8=Q Rxe8 2. Ra8 Rxa8 > 5. -476 1 24848 1. Rh3 b4 2. e8=Q Rxe8 3. Ra7+ Kxa7 > 5. -444 2 35082 1. g4 b4 2. e8=Q Rxe8 3. Ra7+ Kxa7 > 5. -443 2 43613 1. Rh4 b4 2. e8=Q Rxe8 3. Ra7+ Kxa7 > 5. -442 2 53415 1. Kg1 d2 2. e8=Q Rxe8 3. Ra7+ Kxa7 > 5. -442 2 58118 1. Kg1 d2 2. e8=Q Rxe8 3. Ra7+ Kxa7 > 6. -459 3 97429 1. Rc1 d2 2. Ra1 d1=Q+ 3. Rxd1 Nxd1 4. Ke2 Nb2 > 6. -448 5 156222 1. Rh3 b4 2. Rh4 Kb8 3. e8=Q+ Rxe8 4. Ra8+ Kxa8 > 6. ++ 6 194502 1. g4 > 6. -409 7 227112 1. g4 Nc4 2. e8=Q Rxe8 3. h8=Q Rxh8 > 6. -409 8 289357 1. g4 Nc4 2. e8=Q Rxe8 3. h8=Q Rxh8 > 7. -406 13 447301 1. g4 b4 2. g5 Kb6 3. e8=Q Rxe8 4. h8=Q Rxh8 > 7. -406 20 705727 1. g4 b4 2. g5 Kb6 3. e8=Q Rxe8 4. h8=Q Rxh8 > 8. -383 47 1628965 1. g4 Nc4 2. Rh3 Nd2+ 3. Ke1 c4 4. e8=Q Rxe8 > 5. h8=Q Rxh8 > 8. -383 130 4602417 1. g4 Nc4 2. Rh3 Nd2+ 3. Ke1 c4 4. e8=Q Rxe8 > 5. h8=Q Rxh8 > 9. ++ 149 5327119 1. g4 > 9. -- > 9. -336 773 28096190 1. g4 c2 2. e8=Q Rxe8 3. h8=Q Rxh8 4. Rxh8 Kc6 > 5. Ra6+ Kd5 6. g5 > 9. -336 773 28124503 1. g4 c2 2. e8=Q Rxe8 3. h8=Q Rxh8 4. Rxh8 Kc6 > 5. Ra6+ Kd5 6. g5 > 10. -315 1196 43034481 1. g4 c2 2. e8=Q Rxe8 3. h8=Q Rxh8 4. Rxh8 b4 > 5. Ke1 Kc6 > 10. -315 1868 68186566 1. g4 c2 2. e8=Q Rxe8 3. h8=Q Rxh8 4. Rxh8 b4 > 5. Ke1 Kc6 > 11. ++ 2838 102232936 1. g4 > 11. -259 5603 205077307 1. g4 Nc4 2. Rh3 Nd2+ 3. Kg2 c4 4. Rh5 c2 > 5. Rg5 b4 6. Rg8 c1=Q 7. Rxc1 Rxh7 > 11. -259 5785 212303465 1. g4 Nc4 2. Rh3 Nd2+ 3. Kg2 c4 4. Rh5 c2 > 5. Rg5 b4 6. Rg8 c1=Q 7. Rxc1 Rxh7 > > >>I believe that most of humans with 2000 elo will not miss g4 >> >>Uri how did you get negative evaluation? if you count material white has the advantage my programs has positive evaluation after e8=Q because they evaluate 2 rooks as better than knight and advanced passed pawns. Uri
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