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Subject: Re: Black to move and mate in 9? Any engine confirm this?

Author: William Sprague

Date: 18:16:50 02/18/03

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On February 17, 2003 at 13:59:12, Heiner Marxen wrote:

>On February 15, 2003 at 09:17:38, Anson T J wrote:
>
>>[d]r2qr1k1/pp3ppp/3b4/2pp2P1/3n2bP/2P5/PP1PNQ2/RNBK3R b - - 0 1
>>Game I played earlier on ICC
>>
>>White resigned after playing Ne2.
>>
>>I'm sure all engines will find Rxe2! Here with a mate score but does any engine
>>confirm mate in 9?
>
>Chest confirms this to be a mate in 9 (Athlon 1500+, 128 MB hash, 4 hours):
>
>PV: Rxe2 cxd4 Rxf2+ Kc2 Bf5+ Kd1 cxd4 g6 Qe8 gxf7+ Kxf7 Re1 Bd3 Re7+ Qxe7 h5
>Rf1#
>
>Cheers,
>Heiner

CM-9000 on a P4/1.3 gig find mate in 9 as below
Time	Depth	Score	Positions	Moves
0:00	1/3	-14.62	5676		1...Rxe2 2.Qxd4 cxd4 3.Kc2 d3+
					4.Kxd3 Qe7
0:00	1/4	-14.62	8883		1...Rxe2 2.Qxd4 cxd4 3.Kc2 Qe7
					4.Rf1 d3+ 5.Kb3
0:00	1/5	-15.55	50914		1...Rxe2 2.cxd4 Rxf2+ 3.Kc2 cxd4
					4.b3 Rc8+ 5.Kb2 Qa5
0:00	1/6	-18.22	103937		1...Rxe2 2.cxd4 Rxf2+ 3.Kc2 Bf5+
					4.Kd1 Qe8 5.Nc3 cxd4 6.g6 dxc3
					7.gxf7+ Qxf7
0:02	1/7	-18.22	344461		1...Rxe2 2.cxd4 Rxf2+ 3.Kc2 Bf5+
					4.Kd1 Qe8 5.Nc3 cxd4 6.g6 dxc3
					7.gxf7+ Qxf7
0:07	1/8	-Mate10	1148166		1...Rxe2 2.cxd4 Rxf2+ 3.Kc2 Qc8
					4.b3 cxd4+ 5.Kb2 Bf5 6.b4 Qc2+
					7.Ka3 Rf3+ 8.Nc3 Rxc3+ 9.dxc3 Qxc3+
					10.Ka4 Qxb4#
0:18	1/9	-Mate10	2770061		1...Rxe2 2.cxd4 Rxf2+ 3.Kc2 Qc8
					4.Re1 Qf5+ 5.Kc3 Rf3+ 6.Re3 cxd4+
					7.Kb3 Rxe3+ 8.Ka4 Qc2+ 9.b3 Qc6+
					10.Ka5 Qa6#
0:42	1/10	-Mate09	6781528		1...Rxe2 2.cxd4 Rxf2+ 3.Kc2 Bf5+
					4.Kd1 Qe8 5.Nc3 cxd4 6.Re1 d3 7.b3
					Bg4+ 8.Ne2 Bxe2+ 9.Rxe2 Qxe2#

Bill



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