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Subject: Re: Is this a forced mate..?

Author: John Merlino

Date: 11:02:29 02/28/04

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On February 28, 2004 at 10:27:51, Art Basham wrote:

>[D]r1bq2kr/p1pp1ppp/1pn1p3/4P3/2Pb2Q1/BR6/P4PPP/3K1BNR w - - 0 1
>
>Hi..
>I was wondering if any programs out there announce mate at move 1...
>beginning with Qxg7+...?
>
>My programs find Qxg7 but do not ann. a mate...etc
>thanks!
>Art

After forcing the obvious 1.Qxg7 Kxg7 2.Rg3+, CM9000 (SKR personality on a
P4-2.4) still does not see a mate after over 25 minutes:

Time	Depth	Score	Positions	Moves
0:00	1/6	3.65	20899		2...Kh6 3.Bc1+ Qg5 4.Bxg5+ Kg7
					5.Bf6+ Kf8 6.Bxh8 Bxf2
0:00	1/7	3.80	47935		2...Kh6 3.Bc1+ Qg5 4.Bxg5+ Kg7
					5.Bf6+ Kf8 6.Bg7+ Ke7 7.Bxh8 Nxe5
					8.Ne2
0:00	1/7	3.56	69522		2...Qg5 3.Rxg5+ Kh6 4.Rg3 Be3 5.Rxe3
					Rg8 6.Rh3+ Kg7 7.Bd3 h6
0:00	1/8	3.85	110051		2...Qg5 3.Rxg5+ Kh6 4.Rg3 Be3 5.Rxe3
					Rg8 6.Rh3+ Kg7 7.Nf3 Kh8 8.Bd3
0:01	1/9	3.96	241808		2...Qg5 3.Rxg5+ Kh6 4.Rg3 Be3 5.Rxe3
					Rg8 6.Rh3+ Kg7 7.Bd3 Nxe5 8.Rxh7+
					Kf6 9.Be4 Nxc4 10.Bxa8 Nxa3
0:02	1/10	3.74	606087		2...Qg5 3.Rxg5+ Kh6 4.Rg3 Be3 5.Rxe3
					Rg8 6.Rh3+ Kg7 7.Bd3 Nxe5 8.Rxh7+
					Kf6 9.Be4 c6 10.Rh6+ Kg7
0:06	1/11	5.69	1534659		2...Qg5 3.Rxg5+ Kh6 4.Rg3 Be3 5.fxe3
					Nxe5 6.Be7 Ba6 7.Bf6 Bxc4 8.Bg7+
					Kh5 9.Nh3 Ng4 10.Nf4+ Kg5 11.Bxc4
0:13	1/12	5.84	3431998		2...Qg5 3.Rxg5+ Kh6 4.Rg3 Be3 5.fxe3
					Nxe5 6.Bb2 d6 7.e4 Ng6 8.Rh3+ Kg5
					9.Nf3+ Kf4 10.Bxh8 Nxh8 11.Rxh7
0:33	1/13	5.79	9599299		2...Qg5 3.Rxg5+ Kh6 4.Rg3 Be3 5.fxe3
					Nxe5 6.Bb2 d6 7.e4 Ng6 8.Rh3+ Kg5
					9.Nf3+ Kf4 10.Bxh8 Nxh8 11.Rh4+
					Ke3 12.Rxh7
2:00	2/14	7.46	36025958	2...Qg5 3.Rxg5+ Kh6 4.Rg3 Be3 5.fxe3
					Nxe5 6.Bb2 f6 7.e4 Ng4 8.Rxg4 Bb7
					9.Be2 Rhg8 10.Bc1+ Rg5 11.Bxg5+
					fxg5
5:53	3/15	8.08	104471937	2...Qg5 3.Rxg5+ Kh6 4.Rg3 Be3 5.fxe3
					Nxe5 6.Bb2 f6 7.e4 Ng6 8.Bxf6 Rf8
					9.Rh3+ Nh4 10.Rxh4+ Kg6 11.e5 h5
					12.Nh3 Bb7 13.Nf4+ Kf7 14.Rxh5
25:58	4/16	8.07	432967868	2...Qg5 3.Rxg5+ Kh6 4.Rg3 Be3 5.fxe3
					Nxe5 6.Bb2 f6 7.e4 Ng6 8.Bxf6 Rg8
					9.e5 Bb7 10.Rh3+ Nh4 11.Rxh4+ Kg6
					12.Bd3+ Kf7 13.Rxh7+ Kf8 14.Be7+
					Ke8

jm



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