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Subject: Re: about positions that no computer program solve in a reasonable time

Author: Hans Havermann

Date: 11:39:49 04/13/98

Go up one level in this thread


On April 11, 1998 at 03:22:41, blass uri wrote:

>the game was 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Nxe4
>6.d4 b5 7.Bb3 d5 8.d4xe5 Be6 9.c3 Bc5 10.Nbd2 0-0 11.Bc2
>Bf5 12.Nb3 Nxf2 13.Rxf2 Bxf2+ 14.Kxf2 Bxc2 15.Qxc2 f6
>16.Nbd4(is this a new move?) f6xe5 17.Nxc6 Qd6 18.Nxe5 Qxe5
>19.Kg1 Rxf3 20.gxf3 Qe1+ 21.Kg2 Re8 22.Kh3 Re5
>23.Bf4(the best move) Rh5+

You may be right, though white's score is hardly encouraging:

Crafty-15.0-beta-980401 (for Macintosh)

setboard 6k1/2p3pp/p7/1p1pr3/8/2P2P1K/PPQ4P/R1B1q3 w - -
analyze

depth   time  score   variation
  5     1.68   1.21   1. a4 Rh5+ 2. Kg2 Re5 3. Bf4 Re2+ 4.
                      Kh3
  5     2.93   1.22   1. Qd2 Qf1+ 2. Qg2 Rh5+ 3. Kg3 Qe1+
                      4. Kg4
  5->  13.61   1.22   1. Qd2 Qf1+ 2. Qg2 Rh5+ 3. Kg3 Qe1+
                      4. Kg4
  6    18.36   1.08   1. Qd2 Qf1+ 2. Qg2 Qe1 3. Qg3 Qf1+
                      4. Kh4 Qe2
  6->  34.66   1.08   1. Qd2 Qf1+ 2. Qg2 Qe1 3. Qg3 Qf1+
                      4. Kh4 Qe2
  7    43.83   0.92   1. Qd2 Qg1 2. Qg2 Rh5+ 3. Kg3 Qe1+
                      4. Kf4 Re5 5. Kg4 <HT>
  7     1:02   1.06   1. a4 Rh5+ 2. Kg2 Re5 3. Qd3 Re2+ 4.
                      Kh3 Qf1+ 5. Kh4
  7->   1:11   1.06   1. a4 Rh5+ 2. Kg2 Re5 3. Qd3 Re2+ 4.
                      Kh3 Qf1+ 5. Kh4
  8     1:25     --   1. a4
  8     1:39  -2.86   1. a4 Qg1 2. Qg2 Rh5+ 3. Kg3 Qe1+ 4.
                      Qf2 Rh3+ 5. Kxh3 Qxf2 6. f4
  8     1:55     ++   1. f4!!
  8     2:03  -2.41   1. f4 Re2 2. Qd3 Qf1+ 3. Kg4 Rg2+ 4.
                      Qg3 Rxg3+ 5. hxg3 Qf2
  8     2:22  -2.34   1. Qd3 Qg1 2. Bg5 Qxg5 3. Rd1 c6 4.
                      Qd4 Re2 5. Rg1
  8->   3:48  -2.34   1. Qd3 Qg1 2. Bg5 Qxg5 3. Rd1 c6 4.
                      Qd4 Re2 5. Rg1
  9     3:58  -2.44   1. Qd3 Qg1 2. Bg5 Qxg5 3. Rd1 c6 4.
                      Rf1 Qh6+ 5. Kg2 Qf4
  9     4:28  -2.43   1. f4 Re2 2. Qd3 Qf1+ 3. Kg4 Rg2+ 4.
                      Qg3 Rxg3+ 5. hxg3 Qe2+ 6. Kg5 Qe4
  9->   5:07  -2.43   1. f4 Re2 2. Qd3 Qf1+ 3. Kg4 Rg2+ 4.
                      Qg3 Rxg3+ 5. hxg3 Qe2+ 6. Kg5 Qe4
 10     5:47  -2.44   1. f4 Re2 2. Qd3 Qf1+ 3. Kg4 Rg2+ 4.
                      Qg3 Qe2+ 5. Kh3 Rxg3+ 6. hxg3 Qe6+
                      7. Kh2 Qg4
 10->   7:41  -2.44   1. f4 Re2 2. Qd3 Qf1+ 3. Kg4 Rg2+ 4.
                      Qg3 Qe2+ 5. Kh3 Rxg3+ 6. hxg3 Qe6+
                      7. Kh2 Qg4
 11    10:17  -2.46   1. f4 Re2 2. Qd3 Qf1+ 3. Kg4 Rg2+ 4.
                      Qg3 Qe2+ 5. Kh3 Rxg3+ 6. hxg3 Kf7 7.
                      Rb1 Qh5+ 8. Kg2 Qe2+
 11->  14:21  -2.46   1. f4 Re2 2. Qd3 Qf1+ 3. Kg4 Rg2+ 4.
                      Qg3 Qe2+ 5. Kh3 Rxg3+ 6. hxg3 Kf7 7.
                      Rb1 Qh5+ 8. Kg2 Qe2+
 12    19:38  -2.59   1. f4 Re2 2. Qd3 Qf1+ 3. Kg4 Rg2+ 4.
                      Qg3 Qh1 5. Kf5 Rxg3 6. hxg3 Qh5+ 7.
                      Ke6 Qg4+ 8. f5 Qxg3 9. Kxd5
 12->  32:06  -2.59   1. f4 Re2 2. Qd3 Qf1+ 3. Kg4 Rg2+ 4.
                      Qg3 Qh1 5. Kf5 Rxg3 6. hxg3 Qh5+ 7.
                      Ke6 Qg4+ 8. f5 Qxg3 9. Kxd5
 13    33:14     --   1. f4
 13    40:47  -2.90   1. f4 Re2 2. Qd3 Qf1+ 3. Kg4 Rg2+ 4.
                      Qg3 Qe2+ 5. Kh3 Rf2 6. Qxf2 Qxf2 7.
                      Rb1 Qf3+ 8. Kh4 Qg2 9. h3
 13    90:10  -2.64   1. Bf4 Rh5+ 2. Kg2 Qxa1 3. Qe2 Rf5
                      4. Bxc7 Qxa2 5. Bd6 Rg5+ 6. Kh3 h6
                      7. Qe8+ Kh7 8. Qe2 Qb1 9. Be5
 13->  96:09  -2.64   1. Bf4 Rh5+ 2. Kg2 Qxa1 3. Qe2 Rf5
                      4. Bxc7 Qxa2 5. Bd6 Rg5+ 6. Kh3 h6
                      7. Qe8+ Kh7 8. Qe2 Qb1 9. Be5
 14   108:56  -2.77   1. Bf4 Rh5+ 2. Kg2 Qxa1 3. Qe2 Kf7
                      4. Bxc7 Qxa2 5. Bd6 Rg5+ 6. Kh3 Qb1
                      7. Qe7+ Kg6 8. Qe8+ Kh6 9. Qe6+ Qg6
                      10. Qe7
 14-> 186:09  -2.77   1. Bf4 Rh5+ 2. Kg2 Qxa1 3. Qe2 Kf7
                      4. Bxc7 Qxa2 5. Bd6 Rg5+ 6. Kh3 Qb1
                      7. Qe7+ Kg6 8. Qe8+ Kh6 9. Qe6+ Qg6
                      10. Qe7
 15   224:16  -2.81   1. Bf4 Rh5+ 2. Kg2 Qxa1 3. Qe2 Kf7
                      4. Bxc7 Qxa2 5. Bd6 Rg5+ 6. Kh3 Qb1
                      7. f4 Qf5+ 8. Kh4 Rg1 9. Qe7+ Kg6 10.
                      Be5
 15-> 441:54  -2.81   1. Bf4 Rh5+ 2. Kg2 Qxa1 3. Qe2 Kf7
                      4. Bxc7 Qxa2 5. Bd6 Rg5+ 6. Kh3 Qb1
                      7. f4 Qf5+ 8. Kh4 Rg1 9. Qe7+ Kg6 10.
                      Be5
 16   552:28  -2.81   1. Bf4 Rh5+ 2. Kg2 Qxa1 3. Qe2 Kf7
                      4. Bxc7 Qxa2 5. Bd6 Rg5+ 6. Kf2 h6
                      7. Qe7+ Kg8 8. Qe8+ Kh7 9. Qe2 Qc4
                     10. Qe3 Rf5 11. Kg2



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