Author: Dan Homan
Date: 07:35:17 07/16/98
Go up one level in this thread
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 | | | | | | | |<R>| White to move
+---+---+---+---+---+---+---+---+
7 | |<K>| | | P | | | P | castle: -
+---+---+---+---+---+---+---+---+
6 | | | | |<P>| | | |
+---+---+---+---+---+---+---+---+
5 | |<P>|<P>| | | | | |
+---+---+---+---+---+---+---+---+
4 | | | | | | | | | fifty: 0
+---+---+---+---+---+---+---+---+
3 | | |<P>|<P>| | | | | Computer time: 30 seconds
+---+---+---+---+---+---+---+---+
2 | |<N>| | | | 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
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