Author: Mike Byrne
Date: 03:39:19 10/17/03
Go up one level in this thread
On October 17, 2003 at 05:10:09, Lyn Harper wrote: >On October 17, 2003 at 05:08:37, Lyn Harper wrote: > >>[D] 2br1R1R/8/1Ppp1br1/3B1k1P/Q1NP1P2/1N4BP/2P5/2Kn4 w - - >> >> I got this one from the back pages of "Blackburne's Chess Games". >> Interesting, because Blackburne himself claims a mate in 4. >> This is his solution: >> 1 Rh6 Rxh6 >> 2 Nc5 cd >> 3 Qe8 Any >> 4 white mates accordingly (his words). >> I have'nt gone over it to find out where Blackburne went wrong, but >> this is what CM9K with ss=0 has to say. >> >> Lyn > Time Depth Score Positions Moves >---- ---- ---- ---- ---- >0:00 3/3 23.93 4050 1.hxg6 Rxf8 2.Rxf8 cxd5 3.Nxd6+ > Kxg6 4.Rxc8 >0:00 3/3 25.04 34510 1.Qxc6 Rxg3 2.Nxd6+ Kxf4 3.Rxf6+ > Kg5 4.Ne4+ Kh4 5.Rxd8 >0:00 4/4 Mate09 90710 1.Qxc6 Rxg3 2.Rxf6+ Kxf6 3.Qc7 > Rd7 4.Qxc8 Rgg7 5.Rf8+ Rgf7 6.Rxf7+ > Rxf7 7.Qe6+ Kg7 8.Qxf7+ Kh6 9.Qg6# >0:01 5/5 Mate07 429957 1.Qxc6 Rxg3 2.Rxf6+ Kxf6 3.Rxd8 > Be6 4.Qxd6 Rg8 5.Qxe6+ Kg7 6.Rxg8+ > Kh7 7.Be4# >0:49 5/5 Mate06 1061070 1.Rh7 Be6 2.Bxe6+ Kxe6 3.Qxc6 Bg7 > 4.Qe4+ Kd7 5.Rf7+ Kc8 6.Qb7# >0:52 6/6 Mate06 1285730 1.Rh7 Be6 2.Bxe6+ Kxe6 3.Qxc6 Bg7 > 4.Qe4+ Kd7 5.Rf7+ Kc8 6.Qb7# >0:57 6/6 Mate05 2733438 1.Rh6 Bb7 2.Rxg6 cxd5 3.Rfxf6+ > Ke4 4.Ncd2+ Ke3 5.Re6# >0:58 7/7 Mate05 2929638 1.Rh6 Bb7 2.Rxg6 cxd5 3.Rfxf6+ > Ke4 4.Ncd2+ Ke3 5.Re6# >1:02 8/8 Mate05 4114710 1.Rh6 Bb7 2.Rxg6 cxd5 3.Rfxf6+ > Ke4 4.Ncd2+ Ke3 5.Re6# >1:11 9/9 Mate05 6343708 1.Rh6 Bb7 2.Rxg6 cxd5 3.Rfxf6+ > Ke4 4.Ncd2+ Ke3 5.Re6# it'a mate-in-5 accoding to Chest (which I believe) -- Black does not have to recapture the rook after Rxh6 and delays the mate.
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