Author: James Robertson
Date: 15:44:27 02/08/00
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On February 08, 2000 at 17:27:09, José Antônio Fabiano Mendes wrote: >Shirov-Nikolenko,USSR Ch. 1991[analysis] >[D]r3r3/1b2nkpp/7B/p4p2/1p1PN3/6Q1/1P4PK/R4q2 b - - >Shirov writes:"White is a rook down and all of his pieces are hanging,but I >still believed his chances were better until FRITZ4 found the astonishing >25...Qf4!!". Enjoy,JAFM [from the book review in www.smartchess.com] I don't think Qf4 is that amazing. Insomniac, which is weak in king attack tactics, finds Qf4 in 17 seconds on my P233 with a 4MB hash table. Programs that specialize in this kind of attack are probably even faster. Can anyone provide times for LG, AnMon, LambChop, Fritz? James Position #1: Shirov - Nikolenko Solved Depth Score Time Nodes PV 1 1113 0 67 Qxa1 Qxg7+ 2 1054 0 173 Qxa1 Qxg7+ Ke6 3 940 220 3670 Qxa1 Qxg7+ Ke6 Nc5+ Kd5 Nxb7 Qxb2 4 911 220 5368 Qxa1 Qxg7+ Ke6 Qe5+ Kd7 Nf6+ Kc6 Nxe8 Rxe8 5 605 280 9689 Qxa1 Qxg7+ Ke6 Qe5+ Kd7 Nf6+ Kc8 Nxe8 Qxb2 Qxe7 Qxg2+ 6 605 440 25665 Qxa1 Qxg7+ Ke6 Qe5+ Kd7 Nf6+ Kc8 Nxe8 Qxb2 Qxe7 Qxg2+ 7 533 1100 88755 Qxa1 Qxg7+ Ke6 Qe5+ Kd7 Nf6+ Kd8 Qd6+ Kc8 Qd7+ Kb8 Qxe8+ Nc8 8 332 3350 266321 Qxa1 Ng5+ Kg8 Qe5 Qh1+ Kxh1 Bxg2+ Kxg2 gxh6 Ne6 9> 31 17800 1521622 Qf4 Bxf4 Bxe4 Be5 g6 Qg5 Nd5 b3 Kg8 9 31 22960 1984864 Qf4 Bxf4 Bxe4 Be5 g6 Qg5 Nd5 b3 Kg8 10 22 39220 3387930 Qf4 Bxf4 Bxe4 Be5 g6 Qg5 Kg8 b3 Nc6 Qf4 11 27 72180 6313588 Qf4 Bxf4 Bxe4 Bc7 a4 Be5 g6 Rxa4 Bxg2 Qb3+ Bd5 Qxb4 Extensions: 339789 check, 239 mate, 15497 recapture.
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