Author: Bernhard Bauer
Date: 00:41:10 08/25/00
Go up one level in this thread
On August 24, 2000 at 08:46:11, Uri Blass wrote:
>[D]r3rb1k/6p1/p2p3p/1ppb4/PB6/5NRP/1q3PP1/1B1QR1K1 b - - 0 1
>
>How much time do programs need to find Bc4?
>This was the practically saving move of shredder against nimzo.
>
>I think the move is losing but it gave shredder practical chances for a draw and
>nimzo was not good enough to win(the typical computer move Qxb4 gives white an
>easy way to win).
>
>Uri
Crafty17.12 on a 2xP3-450 and 48mb hash gave the following output:
12-> 2:24 0.18 1. ... Qxb4 2. Qxd5 Rxe1+ 3. Nxe1 Qxe1+
4. Kh2 Qe8 5. Qd3 g6 6. Rxg6 Qe5+ 7.
g3 Ra7 8. axb5 Rf7 9. Kg2 axb5 10.
Qxb5
13 2:46 -- 1. ... Qxb4
13 4:35 -0.26 1. ... Qxb4 2. Qxd5 Rxe1+ 3. Nxe1 Qxe1+
4. Kh2 Qe8 5. Re3 Qb8 6. Qf5 d5+ 7.
Rg3 Kg8 8. Qxd5+ Kh8 9. Qf5 Kg8 10.
Qh7+ Kf7 11. Qg6+ Ke7 12. Qe4+ Kd6
13. axb5 axb5 14. Bd3
(2) 13-> 10:39 -0.26 1. ... Qxb4 2. Qxd5 Rxe1+ 3. Nxe1 Qxe1+
4. Kh2 Qe8 5. Re3 Qb8 6. Qf5 d5+ 7.
Rg3 Kg8 8. Qxd5+ Kh8 9. Qf5 Kg8 10.
Qh7+ Kf7 11. Qg6+ Ke7 12. Qe4+ Kd6
13. axb5 axb5 14. Bd3
14 11:22 -- 1. ... Qxb4
14 19:45 -1.85 1. ... Qxb4 2. Qxd5 Rxe1+ 3. Nxe1 Qxe1+
4. Kh2 Qe8 5. Re3 Qb8 6. Qf5 d5+ 7.
Kg1 g6 8. Qxg6 Qa7 9. Rg3 Qg7 10. Qe6
Qxg3 11. fxg3 d4
14 99:11 -1.51 1. ... Bc4 2. Ba5 b4 3. Be4 Rxe4 4.
Rxe4 Bb3 5. Qe1 Bxa4 6. Nh4 d5 7. Ng6+
Kg8 8. Ne7+ Bxe7 9. Rxe7 b3
14 184:42 -1.36 1. ... Ba2 2. Bxa2 Qxa2 3. Bd2 Qxa4
4. Qxa4 bxa4 5. Rg4 Rxe1+ 6. Bxe1 a3
7. Ra4 Kg8 8. Rxa3 Kf7 9. Ba5 Re8 10.
Rb3
(4) 14-> 187:24 -1.36 1. ... Ba2 2. Bxa2 Qxa2 3. Bd2 Qxa4
4. Qxa4 bxa4 5. Rg4 Rxe1+ 6. Bxe1 a3
7. Ra4 Kg8 8. Rxa3 Kf7 9. Ba5 Re8 10.
Rb3
(3) 15 243:37 -1.46 1. ... Ba2 2. Bg6 Bb3 3. Rxe8 Rxe8
4. Qd2 Qxd2 5. Bxd2 Rb8 6. axb5 axb5
7. Ne5 Be6 8. Nc6 Rc8 9. Na7 Rb8 10.
Nc6
(2) 15-> 355:46 -1.46 1. ... Ba2 2. Bg6 Bb3 3. Rxe8 Rxe8
4. Qd2 Qxd2 5. Bxd2 Rb8 6. axb5 axb5
7. Ne5 Be6 8. Nc6 Rc8 9. Na7 Rb8 10.
Nc6
16 413:11 -1.41 1. ... Ba2 2. Bg6 Bb3 3. Rxe8 Rxe8
4. Qd2 Qxd2 5. Bxd2 Ra8 6. Be4 Ra7
7. axb5 axb5 8. Ne5 Be6 9. Ng6+ Kg8
10. Rf3 Ra1+ 11. Kh2 Bf7
(2) 16-> 568:39 -1.41 1. ... Ba2 2. Bg6 Bb3 3. Rxe8 Rxe8
4. Qd2 Qxd2 5. Bxd2 Ra8 6. Be4 Ra7
7. axb5 axb5 8. Ne5 Be6 9. Ng6+ Kg8
10. Rf3 Ra1+ 11. Kh2 Bf7
So it stayed with Qxb4 until it found Bc4 after 99 min. Later on it changed to
Ba2.
Kind regards
Bernhard
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