Author: Jon Dart
Date: 19:06:50 08/29/03
This is from a game Abrok 5-Arasan 6.3, part of Leo Dijksman's WBEC tourney:
[D] 3r1r2/pb3pkp/1pn1qNp1/2p1P3/5P2/P2BQ3/1P4PP/3R1R1K w - -
f5! 1-0.
Arasan 7.1 gets this in 28 seconds on an Athlon XP2500:
ply 1. Qd2 0 seconds. score: +0.88 17 nodes.
ply 1. Qd2 0 seconds. score: +0.88 63 nodes.
ply 2. Qd2 0 seconds. score: +0.88 370 nodes.
ply 2. Qd2 0 seconds. score: +0.38 427 nodes.
ply 2. Qd2 0 seconds. score: +0.38 477 nodes.
ply 2. Qd2 0 seconds. score: +0.38 580 nodes.
ply 3. Qf2 0 seconds. score: +0.38 1642 nodes.
ply 3. Qg3 0 seconds. score: +0.70 2413 nodes.
ply 3. Qg3 0 seconds. score: +0.70 2606 nodes.
ply 4. Qg3 0 seconds. score: +0.53 8915 nodes.
ply 5. Qg3 0 seconds. score: +0.64 26593 nodes.
ply 6. Qg3 0 seconds. score: +0.50 114184 nodes.
ply 7. Qg3 1 seconds. score: +0.69 437510 nodes.
ply 8. Qg3 3 seconds. score: +0.45 1502446 nodes.
ply 9. Qg3 9 seconds. score: +0.58 4019428 nodes.
ply 10. f5 28 seconds. score: +0.75 11940485 nodes.
ply 10. f5 30 seconds. score: +0.75 13023028 nodes.
ply 11. f5 43 seconds. score: +1.25 18720321 nodes.
ply 11. f5 60 seconds. score: +1.25 25818502 nodes.
430165 nodes/second.
7817293 regular nodes, 18001209 quiescence nodes.
7588623 searches of hash table, 2431528 successful (32 percent).
1999392 hash entries inserted, 2553547 entries replaced, 1739324 inserts failed.
move ordering: 1st 90.6619% 2nd 5.13869% 3rd 1.75734% 4th 0.667596%
null cutoffs: 3160958 (12%)
pruning: 15447677 moves (futility), 1575871 nodes (razored)
extensions: 1469490 check, 107444 recapture, 4144 capture,
86932 pawn, 36463 threat, 172767 forced move.
0 tablebase probes, 0 tablebase hits
Version 6.3 takes 49 seconds on the same machine, and gives a less decisive
score (+0.86).
--Jon
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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