Author: Rafael Andrist
Date: 08:43:04 03/29/02
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On March 29, 2002 at 11:11:26, Art Basham wrote: >White mates in 6 with 1. f3..! >[D]8/8/6kN/8/6NK/8/p4P2/B7 w - - > >From an old CCC Reports publication... > >Novag Scorpio could not do this one because... > instead of promoting to a knight, it promotes to a bishop..! Wilhelm finds it without any problems. This search is without EGTB. If I use EGTB, it finds a mate in 20 first before it sees the mate in 6. Without EGTB, the solution is found clearly faster: ply time value nodes N nodes Q PV 1 0s 9.37 19 9 Ba1-e5 2 0s 10.54 137 46 f2-f4 Kg6-h7! f4-f5 3 0s 10.54 820 128 f2-f3 Kg6-h7! f3-f4 Kh7-g6! f4-f5+ 4 0s 11.97 3621 580 Ba1-e5 Kg6-h7 Kh4-g5 a2-a1Q 5 0s 12.13 17508 1830 f2-f3 Kg6-h7! f3-f4 Kh7-g6! f4-f5+ Kg6-h7! Ba1-e5 a2-a1Q 6 0s 12.14 68301 7837 f2-f4 Kg6-h7! Ba1-e5 Kh7-g6 f4-f5+ Kg6-h7! Kh4-g5 a2-a1Q 7 2s +# 6 269259 28891 f2-f3 Kg6-h7! f3-f4 Kh7-g6! f4-f5+ Kg6-h7! f5-f6 Kh7-g6 f6-f7 Kg6-h7! f7-f8N+ 8 8s +# 6 907906 100845 f2-f3 Kg6-h7! f3-f4 Kh7-g6! f4-f5+ Kg6-h7! f5-f6 Kh7-g6 f6-f7 Kg6-h7! f7-f8N+ Alpha cutoffs: 41521, Beta cutoffs: 140346, 1st Beta cutoff: 97.99% Futility cutoffs: 538, Nullmove searches: 31702, Nullmove cutoffs: 0.02% Hash: Stored: 524454, Accesses: 905658, successful: 59.99% Depth: complete: 8 ply, Extensions: 16 ply, Quiescecence: 19 ply Co-ord. square sys: 0 EGTB accesses: 0 nodes total: 1008751, Quiescence: 10.00% time: 8 sec, Speed: 126093 nod/sec regards Rafael B. Andrist
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