Author: Roy Eassa
Date: 15:52:00 12/19/02
Go up one level in this thread
On December 19, 2002 at 16:37:12, Roy Eassa wrote:
>On December 19, 2002 at 16:33:10, Roy Eassa wrote:
>
>>[d] 1r4k1/p1p2pp1/7p/3q3P/7b/KN2Q2P/PPP5/RN5R b - - 0 1
>>
>>How long to find ...Be7+ and announce mate in 6?
>>
>>Too easy for desktop PCs.
>>
>>Chess Tiger for Palm, on my 66 MHz Sony Clie, finds it in about 90 seconds.
>
>
>Pocket Fritz 1.0 on a 206 MHz Pocket PC selects the correct move almost
>instantly, announces mate in 8 very soon after that, and finally sees that it's
>mate in 6 after about 20 seconds.
>
>
>By the way, this is from a 1996 game at the Manhattan Chess Club, between Dean
>Ippolito (USCF 2380) and Eric Cooke (USCF 2324), as shown in the current "Chess
>Life" magazine.
Correction, it's from this game:
Passov,Alex - Sammour-Hasbun,Jorge [C58]
Manhattan Chess Club G/30, 1991
1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.d3 h6 7.Nf3 e4 8.Qe2 Nxc4
9.dxc4 Bc5 10.Nfd2 0-0 11.Nb3 Bg4 12.Qf1
[12.Qd2? e3 13.fxe3 Ne4 -+]
12...Be7
[12...Bb4+ 13.c3 Be7 14.h3 Bf5 15.Be3 Nd7 =]
13.Be3 b5 14.h3 Bh5 15.g4
[15.Nd4 is a lot better]
15...bxc4 16.Qxc4
[16.Nd4 is better according to "Chess Life"]
16...Nxd5!? 17.gxh5
[17.N1d2 Nxe3 18.fxe3 Bh4+ 19.Kd1 Bg6 -/+]
17...Nxe3 18.fxe3 Bh4+ 19.Ke2 Qg5 20.Qxe4?
[20.Kd1 Rfd8+ 21.N1d2 Bf2 22.h4 Qg2 23.Qf1 Qf3+ 24.Kc1 Bxe3 25.Qxf3 exf3
26.c3 and it looks like White escapes: ±]
20...Rae8?
[20...Rfe8! crushes, e.g., 21.Qf3 Rad8 22.e4 Qb5+ -+]
21.Qf3 Rxe3+! 22.Qxe3 Qg2+ 23.Kd3 Rd8+ 24.Kc4
[24.Kc3 Qxh1 25.Na3 Bf6+ 26.Kb4 a5+! 27.Kxa5 Qa8+ 28.Kb4 Bxb2 -+]
24...Qd5+ 25.Kb4 Rb8+ 26.Ka3? {allows the above mate in 6}
[26.Kc3 Bf6+ 27.Nd4 c5 28.Kd3
(28.Rd1 cxd4+ 29.Rxd4 Rd8 -+)
28...Bxd4 29.Nc3 c4+ -+]
26...Be7+! 27.Qxe7 Rxb3+! 28.axb3 Qa5#
A better puzzle might be from after White's move 21. How long to see that
21...Rxe3+ is very advantageous to Black? :
[d] 4rrk1/p1p2pp1/7p/6qP/7b/1N2PQ1P/PPP1K3/RN5R b - - 0 20
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