Author: Ron Murawski
Date: 16:30:57 10/30/02
Go up one level in this thread
On October 30, 2002 at 16:13:36, Gerd Isenberg wrote:
>Position from Shark - IsiChessMMX, Leiden Round 10
>
>[D] r4rk1/2n1b1pN/pqb1p1Qp/1p6/P1p3n1/N1P1B3/1PB2PPP/R2R2K1 b - - ; bm Rxf2
>
>Even if the position is already won by black, finding the spectacular 24...Rxf2
>seems quite difficult for some engines. Ruffian is clearly the fastest i tried
>so far on my 2.1XP+ :
>
>Ruffian 1.0.0 2 seconds
>Shredder5 14 seconds
>IsiChessMMX 47 seconds
>
>May be a bad testposition due to Nxe3 wins too.
>
>Cheers,
>Gerd
For Horizon, about 5 seconds on an AMD 1.8MHz w/ 60MB hash
Depth Score Time Nodes pv
5 50 .55 23000 Nxe3 a5 Qa7 fxe3 Bxa3 Rxa3 Qxe3+
6 57 .77 64012 Nxe3 a5 Qa7 fxe3 Qxe3+ Kh1 Rf2 Rg1 Bxa3 Rxa3
7 87! 1.05 138888 Nxe3 fxe3 Qxe3+ Kh1 Rf2 Qxg7+ Kxg7 Re1
7 245 1.49 252493 Nxe3 a5 Qa7 fxe3 Qxe3+ Kh1 Rf2 Re1 Qh3
8 270 2.80 672701 Nxe3 a5 Qa7 fxe3 Qxe3+ Kh1 Rf2 Re1 Qd2 Be4 Bxe4
Rxe4 Bxa3 Rxa3
8 274! 5.17 1325481 Rxf2 Nf6+ Bxf6 Bxf2 Nxf2 Qh7+ Kf8 Qh8+ Ke7 b4
8 512 7.31 1868282 Rxf2 Nf6+ Bxf6 Qh7+ Kf8 Bxb6 Rxg2+ Kf1 Nxh2+ Ke1
Bh4+ Bf2 Bxf2+ Kd2 Bc5+ Ke1 Rxc2
9 541! 14.06 3847018 Rxf2 Qxg4 Qxe3 axb5 axb5 Bg6 Rxg2+ Kf1 Bxa3 Rxa3
9 586 23.13 6201317 Rxf2 Nf6+ Bxf6 Qh7+ Kf8 Bxb6 Rxg2+ Kf1 Nxh2+ Ke1
Bh4+ Bf2 Bxf2+ Kd2 Bg3+ Kc1 Bf4+ Kb1 Rxc2
10 615! 43.61 11747102 Rxf2 Nf6+ Bxf6 Qh7+ Kf8 Nxc4 Rxg2+ Kh1 Rxh2+ Kg1
Nxe3 Qh8+ Kf7 Bg6+ Kxg6 Kxh2
10 790 64.43 16985390 Rxf2 Nf6+ Bxf6 Qh7+ Kf8 Bxb6 Rxg2+ Kf1 Nxh2+ Ke1
Bh4+ Bf2 Rxf2 Rd6 Rf1+ Ke2 Bf3+ Ke3
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