Search found 133 matches

by Dan Astrachan
Thu Sep 09, 2010 4:30 pm
Forum: Computer Chess Club: General Topics
Topic: Old, but still difficult mate in 11 position
Replies: 14
Views: 3085

Re: Old, but still difficult mate in 11 position

Ivanhoe 9.55b also finds the mate in 11 (needs over 15 minutes of my quad-core machine though)

Code: Select all

M11 1.e4 Qd4 2.Nc3 Kf8 3.Qf3+ Kg8 4.h4 Kg7 5.Rh3 Qf6 6.Rg3+ Kf7 7.Bc4+ Ke7 8.Nd5+ Kd6 9.Qxf6+ Kc5 10.Qb6+ Kxc4 11.Qb4#  (5.30)
by Dan Astrachan
Wed Sep 08, 2010 10:59 pm
Forum: Computer Chess Club: General Topics
Topic: Old, but still difficult mate in 11 position
Replies: 14
Views: 3085

Re: Old, but still difficult mate in 11 position

The only engine that finds a mate in 11 on my machine is Fire 1.31

Code: Select all

FEN: 3qk3/8/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 

Fire_131_x64_KLO_popcnt :
   
  29	03:50	3.644.869 949	15.804.000	+M11	e2e4 Qd8d4 Nb1c3 Ke8f7 d2d3 Qd4g7 d3d4 Qg7g6 Qd1f3+ Kf7g7 Bf1c4 Kg7h7 Qf3f8 Qg6xg2 Qf8h6+
by Dan Astrachan
Wed Jun 09, 2010 1:22 pm
Forum: Computer Chess Club: General Topics
Topic: Test Position: One-way street
Replies: 13
Views: 3237

Re: Test Position: One-way street

In the following position, White mistakenly thought the pawn on e7 was up for grabs. This turned out to be very costly. How long til your engine sees the safer [D]rr4k1/2n1ppbp/q2p2p1/2pPn1B1/P3P3/2N2NPP/1PQ2PK1/R2R4 w - - 0 18 1.Nxe5! Hi :) I analyzed this position on my little Asus Netbook. Using...