Author: Dieter Buerssner
Date: 15:31:09 05/28/05
Go up one level in this thread
On May 27, 2005 at 19:33:30, Vladimir Xern wrote:
>Using Yace and SlowChess Blitz WV (on a 1.4 GHz Athlon), I came across an
>interesting PV after forcing a few moves. 1... gxf4 2.Kf3 Rd1 3.g5 Rg1 4.Rg2
>Rxg2 5.Kxg2 Ke4 6.Kf1 f3 7.g6 Bd4 8.g7 Bxg7 9.Kf2 Bd4+ 10.Kf1 Ke3 11.Kg1 f2+
>12.Kf1 Be5 13.Kg2 Ke2 14.Kh1 f1=Q#. Perhaps 1...gxf4 is the right direction.
After a long think, I get:
499202284 49:56.2 Mat18 18t+ 1...gxf4 2.Kf3 Rd1 3.Rc2 Rf1+ 4.Ke2 Rf2+ 5.Kd1
Rxc2 6.Kxc2 f3 7.Kd3 Bg5 8.Kc4 f2 9.Kc3 f1=Q
10.Kb4 Kd5 11.Kb3 Qc4+ 12.Kb2 Kd4 13.Kb1 Qf1+
14.Kc2 Qxh3H {HT} {1351}
1175314063 58:15.9 Mat18 18t 1...gxf4 2.Kf3 Rd1 3.g5H Rg1H 4.Rf2H Rg3+H
5.Ke2H Bxf2H 6.Kxf2H f3H 7.Ke1H Rxh3H 8.g6H
Kf5H 9.Kf1H Kxg6H 10.Ke1H Kf6H {EGTB} 11.Kd2
f2! 12.Ke2! Rh2! 13.Ke3 f1=Q! 14.Kd4! Qe1
15.Kd5 Qc3 16.Ke4! Rd2! 17.Kf4 Rd4#! {1581}
432116697 1:32:59 Mat18 18. 1...gxf4 2.Kf3 Rd1 3.g5 Rg1 4.Rf2 Rg3+ 5.Ke2
Bxf2 6.Kxf2 f3 7.Ke1 Rxh3 8.g6 Kf5 9.Kf1 Kxg6
10.Ke1 Kf6 {EGTB} 11.Kd2 f2! 12.Ke2! Rh2!
13.Ke3 f1=Q! 14.Kd4! Qe1 15.Kd5 Qc3 16.Ke4!
Rd2! 17.Kf4 Rd4#! {1581}
1974905837 4:24:21 Mat16 19t 1...gxf4 2.Kf3 Rd1 3.Rc2 Rf1+ 4.Ke2 Rf2+ 5.Kd1
{HT} {350}
2050741823 4:26:30 Mat16 19. 1...gxf4 2.Kf3 Rd1 3.Rc2 Rf1+ 4.Ke2 Rf2+ 5.Kd1
{HT} {350}
1014302439 6:46:00 Mat15 20t 1...gxf4 2.Kf3 Rd1 3.Rc2 Rf1+ 4.Ke2 Rf2+ 5.Kd1
Rxc2 6.Kxc2 f3 7.Kd1 Ke4 8.g5 Kd3 9.Ke1 f2+
10.Kf1H Bd4H 11.g6H Ke3H {350}
1330867277 6:53:49 Mat15 20. 1...gxf4 2.Kf3 Rd1 3.Rc2 Rf1+ 4.Ke2 Rf2+ 5.Kd1
Rxc2 6.Kxc2 f3 7.Kd1 Ke4 8.g5 Kd3 9.Ke1 f2+
10.Kf1 Bd4 11.g6 Ke3 {350}
3955646837 15:41:06 Mat15 21t 1...gxf4 2.Kf3 Rd1 3.Rc2 Rf1+ 4.Ke2 Rf2+ 5.Kd1
Rxc2 6.Kxc2 f3 7.Kd1 Ke4 8.g5 Kd3 9.Ke1 f2+
10.Kf1 Bd4 11.g6 Ke3 12.g7 Bxg7 13.Kg2 Ke2
14.Kh2 Be5+ 15.Kg2H f1=Q#H {1351}
121889958 15:55:15 Mat15 21. 1...gxf4 2.Kf3 Rd1 3.Rc2 Rf1+ 4.Ke2 Rf2+ 5.Kd1
Rxc2 6.Kxc2 f3 7.Kd1 Ke4 8.g5 Kd3 9.Ke1 f2+
10.Kf1 Bd4 11.g6 Ke3 12.g7 Bxg7 13.Kg2 Ke2
14.Kh2 Be5+ 15.Kg2 f1=Q# {1351}
Other engines will most probably find this faster. Perhaps John Merlino has some
patience (finding this faster mate, EGTBs will not help too much). It might even
be on the edge for Chest (in its "classical mode" proving fastest mates).
I followed some lines (including the one, you have given), and got at least mate
in 14 in those lines. I guess mate in 14 is pretty close to the correct fastest
win.
Cheers,
Dieter
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