Author: William Bryant
Date: 13:14:33 11/28/99
Go up one level in this thread
>Posted by Charlie GOLD on November 28, 1999 at 11:41:34:
>
> I would like to know what programs solve/do not solve the position below WHEN
>SET AT 40 MOVES IN 2 HOURS? white side: Kg2, Qf3, Rb1, Ba2-c3, Pa3-b4-g4-h3;
> black side: Kg8, Ra8-f7, Bb6, Nb8-h6, Pa6-b7-c6-c2-f6-g5-h7. white is at the
>bottom of the board. I believe it is MATE IN SIX.
> As an aside, the pieces are in the configuration 2000. Yours, Charlie Gold
MacChess on my machine (G3/266) finds a mate in 53 seconds and the mate in 6 in
3 min 26 seconds (within reasonable time for a 40moves/2hours game).
Screamer finds a different mate (Mate in 7) in 1:31 seconds, but cannot find a
shorter mate in reasonable time.
William
wbryant@ix.netcom.com
MacChess 5.0
rn4k1/1p3r1p/pbp2p1n/6p1/1P4P1/P1B2Q1P/B1p3K1/1R6 w - -
02/01|00:00:00| 1232| -33| Bxf7+ Nxf7 Re1
02/04|00:00:00| 1729| +90| Rc1 a5 Bxf7+ Nxf7 Rxc2 axb4 axb4
03/01|00:00:00| 2586| +90| Rc1 a5 Bxf7+ Nxf7 Rxc2 axb4 axb4
03/16|00:00:00| 6114| +324| Qxf6 Kf8 Qxh6+ Ke7 Qxg5+
04/01|00:00:00| 13627| +505| Qxf6 Kf8 Qxh6+ Ke8 Bxf7+ Kxf7 Qxh7+
05/01|00:00:00| 38608| +642| Qxf6 Kf8 Qxh6+ Ke7 Re1+ Be3 Qxg5+ Kd7 Qxe3
06/01|00:00:00| 85930| +641| Qxf6 Kf8 Qxh6+ Ke7 Re1+ Be3 Qxg5+ Kd7 Qxe3
Rf8
07/01|00:00:01| 212288| +727| Qxf6 Kf8 Qxh6+ Ke7 Re1+ Be3 Qxg5+ Kd7 Qxe3
c1=Q Qd4+ Kc7 Rxc1
08/01|00:00:06| 2047778|+1021| Qxf6 Kf8 Qxh6+ Ke7 Qe6+ Kd8 Qxf7 Nd7 Be6 Kc7
Qxd7+ Kb8 Re1
09/01|00:00:53| 16719231|+M8 | Qxf6 Kf8 Bxf7 Nxg4 hxg4 Nd7 Qd6+ Kxf7 Qxd7+
Kf8 Rf1+ Bf2 Rxf2+ Kg8 Qe6+
10/01|00:01:54| 34574633|+M7 | Qxf6 Kf8 Qd6+ Re7 Re1 Ng8 Bxg8 Kxg8 Rxe7 c1=Q
Rg7+ Kh8 Qf8+
11/01|00:02:26| 44103295|+M7 | Qxf6 Kf8 Qd6+ Re7 Re1 Ng8 Bxg8 Kxg8 Rxe7 c1=Q
Re8+ Kf7 Qe6+
12/01|00:03:26| 61100076|+M6 | Qxf6 Kf8 Qd6+ Re7 Re1 Ng8 Rxe7 Nxe7 Bf6 c1=Q
Qxe7+
12/32|00:03:53| 68312237| n/s: 293185
move-gen:22216650 eval:42076318 e/s:180585 ab-nodes:50817095
ab-move-gen:16199613 tt-hits:3208152 tt-cutoffs:2607234 ab-bf:3.137
search time : 00:03:53
total nodes : 68312237
nodes per second : 293185
ab-nodes : 50817095
ab-nodes per second : 218099
evaluations : 42076318
evaluations per second : 180585
move-generations : 22216650
ab-move-generations : 16199613
ttable-hits : 3208152
ttable-cutoffs : 2607234
ab-branching-factor : 3.137
____________________
Screamer b43
Welcome to Screamer (Beta) 1.00 Build 43
Current Hash Table Size: 16384 K bytes
Current Pawn Hash Size: 4096 K bytes
Debug Control On
PVS Search
NULL move Search
New Board Position
rn4k1/1p3r1p/pbp2p1n/6p1/1P4P1/P1B2Q1P/B1p3K1/1R6 w - -
Move 1 W>>
PLY NODES TIME SCORE PV
____________________________________________
5 11108 0:00 +6.44 Qxf6 Kf8 Qxh6+ Ke7 Re1+ Be3 Qxg5+ Kd7 Qxe3
6 26445 0:00 +6.44 Qxf6 Kf8 Qxh6+ Ke7 Re1+ Be3 Qxg5+ Kd7 Qxe3
7 86948 0:01 +6.56 Qxf6 Kf8 Qxh6+ Ke7 Re1+ Be3 Rxe3+ Kd8 Qxg5+ Kc7
Re7+ Rxe7 Qxe7+ Nd7
8 503546 0:08 +8.87 Qxf6 Kf8 Qxh6+ Ke7 Re1+ Be3 Qxg5+ Kd7 Qxe3 c1=Q
Qxc1
9 1241080 0:20 +10.67 Qxf6 Kf8 Qxh6+ Ke7 Re1+ Kd7 Bxf7 Kc8 Qxh7 Nd7
Qxc2
9 2660019 0:42 +11.17 Bxf7+
10 5961315 1:31 +97.00 Bxf7+ Kxf7 Qxf6+ Ke8 Re1+ Be3 Rxe3+ Kd7 Qg7+ Nf7
Qxf7+ Kd6
11 11715885 2:54 +97.00 Bxf7+ Kxf7 Qxf6+ Ke8 Re1+ Be3 Rxe3+ Kd7 Qg7+ Nf7
Qxf7+ Kd6 Be5++
12 29789260 7:17 +97.00 Bxf7+ Kxf7 Qxf6+ Ke8 Re1+ Be3 Rxe3+ Kd7 Qg7+ Nf7
Qxf7+ Kd6 Be5++
12 41361822 10:00 +97.00 Bxf7+ Kxf7 Qxf6+ Ke8 Re1+ Be3 Rxe3+ Kd7 Qg7+ Nf7
Qxf7+ Kd6 Be5++
Total Search Time: 10:00
Move: Bxf7+
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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