Author: Frank Schneider
Date: 23:54:31 05/16/99
Go up one level in this thread
On May 16, 1999 at 20:10:14, Francis Monkman wrote:
>Here's a good Mate in 9, which I've tried on a selection of engines:
>
>2n2r1k/1rqp2p1/2pR1p1p/1bP1p3/pP5R/P3P3/BB3PPP/3Q2K1 w - -
Gromit (on a slow UltraSparc1) finds a mate in 12 quickly:
starting iteration 5. alpha=39 beta=124
new highscore! Move Rd6-d2 Score=70
Nodes: 19723 nps: 12250.3
Finished iteration 5 after 1.61 sec. Best move: Rd6-d2 score = 70
Var.: 1.Rd6-d2 pf6-f5 2.Ba2-b1 nc8-e7 3.Rd2-d6
starting iteration 6. alpha=40 beta=125
new highscore! Move Rd6-d2 Score=98
fail-high-research of Bb2xe5(98, 149): Score=99 (4.67)
fail-high-research of Bb2xe5(148, 32000): Score=149 (4.67)
fail-high-research of Rh4xh6(100, 151): Score=101 (6.19)
fail-high-research of Rh4xh6(153, 32000): Score=154 (6.19)
new highscore! Move Rh4xh6 Score=389
Nodes: 98672 nps: 13996
Finished iteration 6 after 7.05 sec. Best move: Rh4xh6 score = 389
Var.: 1.Rh4xh6 pg7xh6 2.Qd1-h5 kh8-g7 3.Qh5-g4 kg7-h7 4.Rd6xf6
nc8-e7 5.Rf6xf8
starting iteration 7. alpha=374 beta=459
new highscore! Move Rh4xh6 Score=427
Nodes: 155411 nps: 15525.6
Finished iteration 7 after 10.01 sec. Best move: Rh4xh6 score = 427
Var.: 1.Rh4xh6 pg7xh6 2.Qd1-h5 kh8-g7 3.Qh5-g4 kg7-h7 4.Rd6xf6
bb5-d3 5.Rf6xf8
starting iteration 8. alpha=397 beta=482
fail-high-research of Rh4xh6(481, 632): Score=482 (6.19)
fail-high-research of Rh4xh6(631, 32000): Score=632 (6.19)
new highscore! Move Rh4xh6 Score=31976
Nodes: 277097 nps: 15780
Finished iteration 8 after 17.56 sec. Best move: Rh4xh6 score = 31976
Var.: 1.Rh4xh6 pg7xh6 2.Qd1-h5 kh8-g7 3.Qh5-g4 kg7-h7 4.Ba2-b1
kh7-h8 5.Qg4-g6 bb5-d3
Frank
>
>The line goes:
>
>31. Rxh6+ gxh6 32. Qh5 Kg7 33. Qg4+ Kh7 34. Rxf6 Bd3 (or 34. Bb1+)
>35. Rxf8 Bg6 36. Bg8+ Kg7 37. Rf7+ Kxg8 38. Qxg6+ Kh8 39. Rh7++
>
>Almost all find 31. Rh6+ more or less immediately, although Hiarcs 7 would
>probably play 31. Bxe5 (also winning) at blitz. Times for Mate in 9 (200MHz):
>
>Junior 5 00:20
>LGG 2,0 00:27
>CSTal II 00:27 (giving a score of +34.60, not sure what
>this means)
>CM6000 00:30 (approx)
>Hiarcs 7 (180 MHz) 01:10 "White can mate in 13", it says, and remains
>content.
>Genius 6 01:30
>Crafty 16.6 03:00
>Fritz 5.32 11:14 Interesting...
>Der Bringer ?>30:00 Finds 31. Rxh6+ immediately -- I just love
>this GUI!
>
>Francis
>
>PS how do you put tabs into these messages?
This page took 0.01 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.