Author: Peter McKenzie
Date: 19:54:47 02/09/00
Go up one level in this thread
On February 08, 2000 at 18:44:27, James Robertson wrote: >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? LambChop gets it in a similar time, but fewer ply - 7 ply required. > >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. I notice your check extension percentage is pretty low, are you limiting it heavily? cheers, Peter
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