Author: Jorge Pichard
Date: 14:35:39 02/24/04
Go up one level in this thread
On February 24, 2004 at 16:45:21, Jorge Pichard wrote:
>Here Botvinnik calculated the most straightforward way to win by exchanging off
>the queens! The reason why this position is so important is that if a program
>play any other moves it could delay the win by several minutes, and that could
>lead to a draw, specially if all the is left is 1 or 2 minutes on the clock. By
>not exchanging the queens the game could be extended several moves more between
>30 to 75 more moves.
>
>PS: You will notice that the majority of the top programs besides Shredder 7 and
>8 will play Qd1+ or Qe1+ and this will only prolong the game. I will like to see
>how many minutes do these programs take to select Qe3+ (Ruffian 2, Deep Junior,
>Fritz 8, Deep Fritz8, Chess Tiger, and Hiarcs9)
>
>
>New game
>[D]8/kp6/P5p1/2p1p3/2PpP3/3P3Q/4q3/6K1 b - - 0 1
>
>Analysis by Shredder 8:
>
>1. -+ (-4.56): 1...Qe3+ 2.Qxe3 dxe3 3.axb7 Kxb7 4.Kf1 Ka6 5.Ke2 Ka5 6.Kxe3 Kb4
>7.Kd2 g5 8.Kc2 g4 9.Kd2 g3 10.Ke2 Kc3 11.Kf3 Kxd3 12.Kxg3 Kxe4 13.Kg4 Kd3 14.Kf5
>Kxc4 15.Ke4 Kb5
>2. -+ (-2.76): 1...Qd1+ 2.Kg2 Qd2+ 3.Kh1 Qc1+ 4.Kh2 Qb2+ 5.Kg1 Kxa6 6.Qc8 Qc1+
>7.Kg2 Ka5 8.Qxc5+ b5
>
>(Pichard, MyTown 24.02.2004)
This is what I was refering to, let say that in this position with only 1 minute
left for both sides, NOT to many programs will select Qe3+ and it will lead to a
draw:
[Event "Shootout (Shredder8, Blitz:1') "]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "1/2-1/2"]
[SetUp "1"]
[FEN "8/kp6/P5p1/2p1p3/2PpP3/3P3Q/4q3/6K1 b - - 0 1"]
[PlyCount "55"]
1... Qe1+ {[%eval -298,10] [%emt 0:00:01]} 2. Kg2 {
[%eval -282,11] [%emt 0:00:01]} Qd2+ {[%eval -282,11] [%emt 0:00:01]} 3. Kg1 {
[%eval -288,12] [%emt 0:00:01]} Qc1+ {[%eval -283,12] [%emt 0:00:01]} 4. Kg2 {
[%eval -283,13] [%emt 0:00:02]} Qb2+ {(Qc2+) [%eval -287,11] [%emt 0:00:01]} 5.
Kf1 {[%eval -286,13] [%emt 0:00:01]} bxa6 {[%eval -286,13] [%emt 0:00:01]} 6.
Qe6 {[%eval -286,12] [%emt 0:00:01]} Qb1+ {[%eval -286,11] [%emt 0:00:01]} 7.
Kf2 {[%eval -211,12] [%emt 0:00:02]} a5 {(Qc2+) [%eval -157,10] [%emt 0:00:01]}
8. Qxe5 {(Qd7+) [%eval -131,10] [%emt 0:00:02]} Qc2+ {
[%eval -77,11] [%emt 0:00:03]} 9. Kg1 {[%eval -77,12] [%emt 0:00:01]} Qd1+ {
(Qc1+) [%eval -77,12] [%emt 0:00:01]} 10. Kf2 {[%eval -101,13] [%emt 0:00:02]}
Qd2+ {[%eval -55,13] [%emt 0:00:04]} 11. Kg1 {[%eval -55,14] [%emt 0:00:02]}
Qc1+ {(Qe1+) [%eval -43,11] [%emt 0:00:01]} 12. Kg2 {
[%eval -39,12] [%emt 0:00:01]} Qb2+ {[%eval -64,12] [%emt 0:00:01]} 13. Kf3 {
[%eval -49,13] [%emt 0:00:01]} Qb6 {[%eval -49,12] [%emt 0:00:01]} 14. Qe7+ {
[%eval -70,12] [%emt 0:00:01]} Kb8 {[%eval -83,13] [%emt 0:00:01]} 15. Qd7 {
(Qf8+) [%eval -83,12] [%emt 0:00:01]} Qc7 {[%eval -83,12] [%emt 0:00:01]} 16.
Qe8+ {[%eval -72,12] [%emt 0:00:01]} Kb7 {[%eval -64,13] [%emt 0:00:01]} 17.
Qxg6 {[%eval -62,13] [%emt 0:00:01]} a4 {[%eval -62,12] [%emt 0:00:01]} 18. Qe8
{[%eval -70,12] [%emt 0:00:01]} Qc6 {[%eval -73,12] [%emt 0:00:01]} 19. Qd8 {
(Qf7+) [%eval -74,11] [%emt 0:00:01]} Qc7 {(Ka6) [%eval -46,11] [%emt 0:00:02]}
20. Qe8 {[%eval 0,11] [%emt 0:00:01]} Qc6 {[%eval -9,12] [%emt 0:00:00]} 21.
Qd8 {[%eval -9,13] [%emt 0:00:01]} Qc8 {(Ka6) [%eval -2,12] [%emt 0:00:01]} 22.
Qa5 {[%eval -2,12] [%emt 0:00:01]} Qh3+ {[%eval -2,12] [%emt 0:00:01]} 23. Kf4
{[%eval -2,13] [%emt 0:00:01]} Qe3+ {(Qh6+) [%eval -2,11] [%emt 0:00:01]} 24.
Kf5 {[%eval -1,12] [%emt 0:00:01]} Qf3+ {[%eval -1,12] [%emt 0:00:01]} 25. Kg5
{[%eval -1,13] [%emt 0:00:01]} Qe3+ {(Qg3+) [%eval -1,11] [%emt 0:00:01]} 26.
Kf5 {[%eval 0,11] [%emt 0:00:00]} Qf3+ {(Qh3+) [%eval -1,10] [%emt 0:00:01]}
27. Kg5 {[%eval -1,11] [%emt 0:00:00]} Qg3+ {[%eval -1,12] [%emt 0:00:00]} 28.
Kf5 {[%eval 0,12] [%emt 0:00:01]} Qf3+ {[%eval 0,11] [%emt 0:00:00]} 1/2-1/2
But If I allow Shredder 2 minutes per side it will select the correct move Qe3+,
but the majority of the other top programs will NOT select the correct move and
they might require more than 3 minutes per move on a mere Athlon 1.2 GHz.
[Event "Shootout (Shredder8, Blitz:2') "]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "0-1"]
[SetUp "1"]
[FEN "8/kp6/P5p1/2p1p3/2PpP3/3P3Q/4q3/6K1 b - - 0 1"]
[PlyCount "15"]
1... Qe3+ {[%eval -329,12] [%emt 0:00:04]} 2. Qxe3 {
[%eval -335,18] [%emt 0:00:06]} dxe3 {[%eval -337,22] [%emt 0:00:04]} 3. axb7 {
[%eval -475,25] [%emt 0:00:27]} Kxb7 {[%eval -475,24] [%emt 0:00:07]} 4. Kf1 {
[%eval -475,24] [%emt 0:00:06]} Ka6 {[%eval -507,25] [%emt 0:00:03]} 5. Ke2 {
[%eval -532,25] [%emt 0:00:06]} Ka5 {[%eval -585,25] [%emt 0:00:07]} 6. Kxe3 {
[%eval -610,25] [%emt 0:00:06]} Kb4 {[%eval -611,23] [%emt 0:00:05]} 7. Kd2 {
(Ke2) [%eval -947,23] [%emt 0:00:08]} g5 {[%eval -945,24] [%emt 0:00:04]} 8.
Ke2 {[%eval -963,24] [%emt 0:00:05]} Kc3 {[%eval -1038,24] [%emt 0:00:07]} 0-1
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