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Subject: Re: Test position

Author: Mihaly Szalai

Date: 09:25:17 03/17/05

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On March 17, 2005 at 11:35:01, John Merlino wrote:

>On March 17, 2005 at 10:03:41, Mihaly Szalai wrote:
>
>>
>>[D]5kN1/3p1q2/5P2/5PP1/2pK4/1p1R4/1P6/8 w - - 0 1
>>
>>1. Rxb3! cxb3 2. g6 Qxg8 3. Kc5! (Black queen cannot move) d6+ 4. Kd4 d5 5. Kc5
>>d4 6. Kxd4 +-
>>
>>Mihaly
>
>CM9 Yoda v25 on a P4-2.4 finds the move in just over four minutes:
>
>Time	Depth	Score	Positions	Moves
>0:00	2/7	-1.70	35404		1.Re3 Kxg8 2.Re7 Qh5 3.Rg7+ Kf8
>					4.Kxc4 Qg4+ 5.Kxb3 Qxf5
>0:00	2/8	-1.70	61583		1.Re3 Kxg8 2.Re7 Qh5 3.Rg7+ Kf8
>					4.Kxc4 Qg4+ 5.Kxb3 Qxf5
>0:00	2/9	-1.81	104807		1.Re3 Kxg8 2.Re7 Qh5 3.Rg7+ Kf8
>					4.Kxc4 Qf3 5.Kb4 Qxf5 6.Kxb3
>0:01	3/10	-1.66	239821		1.Re3 Kxg8 2.Re7 Qh5 3.Kxc4 Qg4+
>					4.Kxb3 Qf3+ 5.Kb4 Qxf5 6.Rg7+ Kf8
>					7.Kc4
>0:04	3/11	-1.44	801130		1.Re3 Kxg8 2.Re7 Qh5 3.g6 Qh4+
>					4.Ke5 Qg3+ 5.Kd5 Qd3+ 6.Ke5 Qe2+
>					7.Kd5 Qf3+ 8.Kxc4 Qc6+ 9.Kxb3 Qxf6
>0:08	3/12	-1.65	1748817		1.Re3 Kxg8 2.Re7 Qh5 3.Kxc4 Qg4+
>					4.Kxb3 Qxf5 5.Rg7+ Kf8 6.Kc4 Qe4+
>					7.Kc5 Qe5+ 8.Kc4 Qd6
>0:22	4/13	-1.48	4773648		1.Re3 Kxg8 2.Re7 Qh5 3.g6 Qh4+
>					4.Ke5 Qg3+ 5.Kd5 Qg2+ 6.Kxc4 Qc6+
>					7.Kxb3 Qxf6 8.Rf7 Qb6+ 9.Kc4 Qd6
>0:57	5/14	-1.65	12291069	1.Re3 Kxg8 2.Re7 Qh5 3.g6 Qh4+
>					4.Ke5 Qg3+ 5.Kd5 Qg2+ 6.Kxc4 Qc6+
>					7.Kxb3 Qxf6 8.Rf7 Qd4 9.Ka2 Qd5+
>					10.b3
>2:04	6/15	-1.65	27443782	1.Re3 Kxg8 2.Re7 Qh5 3.g6 Qh4+
>					4.Ke5 Qg3+ 5.Kd5 Qg2+ 6.Kxc4 Qc6+
>					7.Kxb3 Qb6+ 8.Ka3 Qxf6 9.Rf7 Qd4
>					10.Ka2 Qd5+ 11.b3
>4:04	6/15	0.16	54314349	1.Rxb3 cxb3 2.g6 Qxg8 3.Kc5 Ke8
>					4.f7+ Qxf7 5.gxf7+ Kxf7 6.Kd4 Kf6
>					7.Ke4 Kf7 8.Ke5 Ke7 9.f6+ Kf7 10.Kf5
>					d6 11.Kg5
>4:29	7/16	0.09	59962958	1.Rxb3 cxb3 2.g6 Qxg8 3.Kc5 Ke8
>					4.f7+ Qxf7 5.gxf7+ Kxf7 6.Kb4 Kf6
>					7.Kxb3 Kxf5 8.Kc3 Ke4 9.b4 d5 10.b5
>					d4+ 11.Kc4 Ke5
>
>jm

CMX is much faster: (P4 3.0 GHz, 64 MB TT)

Time	Depth	Score	Positions	Moves
0:00	2/4	-1.36	2180		1.Re3 Qxg8 2.g6 d5
0:00	2/5	-0.41	4159		1.Re3 Qxg8 2.g6 d6 3.f7 Qg7+ 4.Kxc4
0:00	3/6	-0.25	13033		1.Re3 Qh5 2.g6 Qg4+ 3.Kc3 Qxf5
					4.Ne7 Qxf6+ 5.Kxc4
0:00	3/7	-0.70	40288		1.Re3 Kxg8 2.Re7 Qh5 3.Rg7+ Kf8
					4.Kxc4 Qg4+ 5.Kxb3 Qxf5
0:00	3/8	-0.70	80389		1.Re3 Kxg8 2.Re7 Qh5 3.Rg7+ Kf8
					4.Kxc4 Qg4+ 5.Kxb3 Qxf5
0:01	4/9	-0.80	179160		1.Re3 Kxg8 2.Re7 Qh5 3.Rg7+ Kf8
					4.Kxc4 Qf3 5.Kb4 Qxf5 6.Kxb3
0:01	4/9	-0.69	277499		1.Rc3 Kxg8 2.Rxc4 Qf8 3.Ke4 Qe8+
					4.Kf4 d5 5.Rd4 Qf7
0:03	5/10	-0.98	515311		1.Rc3 Kxg8 2.Rxc4 Qh5 3.Rc8+ Kf7
					4.g6+ Kxf6 5.Rf8+ Kg7 6.Rf7+ Kg8
					7.Kd5 Qg4
0:04	5/10	-0.62	708462		1.Re3 Kxg8 2.Re7 Qh5 3.Kxc4 Qg4+
					4.Kxb3 Qf3+ 5.Kb4 Qxf5 6.Rg7+ Kf8
					7.Kc4
0:09	6/11	-0.64	1546084		1.Re3 Kxg8 2.Re7 Qh5 3.Kxc4 Qf3
					4.g6 Qc6+ 5.Kxb3 Qxf6 6.Rf7 Qd4
0:17	6/11	-0.02	3033287		1.Rxb3 cxb3 2.g6 Qxg8 3.Kc5 d6+
					4.Kd4 d5 5.Kc3 Ke8 6.f7+ Qxf7 7.gxf7+
					Kxf7 8.Kd4 Kf6 9.Kxd5 Kxf5
0:29	7/12	0.04	4922703		1.Rxb3 cxb3 2.g6 Qxg8 3.Kc5 Qf7
					4.gxf7 Kxf7 5.Kc4 Kxf6 6.Kxb3 Kxf5
					7.Kc3 Ke5 8.b4 d5 9.b5
0:43	8/13	-0.02	7494582		1.Rxb3 cxb3 2.g6 Qxg8 3.Kc5 Qf7
					4.gxf7 Kxf7 5.Kd6 Kxf6 6.Kxd7 Kxf5
					7.Kc6 Ke4 8.Kc5 Kd3 9.Kd5 Ke3



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