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Subject: Test position - seems very hard for computers

Author: Kim Roper Jensen

Date: 02:51:14 11/22/05


[D]4n1k1/3b3p/p5p1/P1QPpp2/2P1P3/2K2P2/2B3PP/2q5 w - - 3 1

Find Kb3

See ChessTiger 2004 and Fruit 2.1 runs here(all on centrino 1.5ghz with 256Mb
hash):

Fruit 2.1 with history 40:
00:00:00.0	-0,73	1	21	exf5 Qe1+ Kb2 Bxf5 Bxf5 gxf5
00:00:00.0	-0,64	1	35	g3 Qe1+ Kb2
00:00:00.0	-0,61	1	1067	Qb6 Qa3+ Kd2
00:00:00.0	-0,53	1	1731	Qe7 Qe3+ Bd3 fxe4 fxe4
00:00:00.1	-0,86	2	2710	Qe7 Qa1+ Kb4 Qb2+ Bb3
00:00:00.1	-0,61	2	2929	Qb6 Qa3+ Kd2
00:00:00.1	-0,76	3	4096	Qb6 Qe1+ Kb2 Qd2 Qxa6 Qxg2
00:00:00.1	-1,46	4	11328	Qb6 Qa1+ Qb2 Qxa5+ Qb4 Qa1+ Kd2 Qd4+ Ke2
00:00:00.2	-1,25	4	20134	Qb4 fxe4 fxe4 Qe1+ Kb3 Qf2
00:00:00.2	-1,05	5	37149	Qb4 fxe4 fxe4 Qe1+ Kb3 Qf2 Qe7
00:00:00.4	-1,14	6	85912	Qb4 fxe4 fxe4 Nf6 Kb3 Qe3+ Ka2 Qf2
00:00:00.7	-1,06	7	293903	Qb4 Qe3+ Kb2 Qf2 c5 Qxg2 c6 Bc8
00:00:01.3	-1,02	8	741572	Qb4 fxe4 fxe4 Qe3+ Kb2 Qf2 Kc3 Nf6 Qb8+ Kg7 Qxe5 Qxg2
00:00:02.4	-0,93	9	1536234	Qb4 fxe4 fxe4 Qe1+ Kb3 Qf2 Qe7 Nf6 Kc3 Qd4+ Kb3 Qe3+
Kb2
00:00:06.5	-1,13	10	4513413	Qb4 Kf7 Qb7 Nf6 exf5 gxf5 Qxa6 Qe3+ Kb2 Qd4+ Ka2 Qd2
Kb2 Qxg2
00:00:09.3	-1,13	11	6587189	Qb4 Kf7 Qb7 Nf6 exf5 gxf5 Qxa6 Qe3+ Kb2 Qd4+ Ka2 Qd2
Kb2 Qxg2
00:00:21.5	-1,28	12	15426982	Qb4 fxe4 fxe4 Nf6 c5 Bf5 Kb3 Bxe4 Bxe4 Qe3+ Kb2
Nxe4 Qb8+ Kf7 Qb7+ Kf8 Qb8+ Ke7 Qxe5+ Kd7
00:00:50.5	-1,66	13	36593949	Qb4 fxe4 fxe4 Nf6 c5 Bg4 Kb3 Bd1 Bxd1 Qxd1+ Ka3
Qa1+ Kb3 Qb1+ Ka3 Qd3+ Qb3 Qxe4 Qb8+ Kg7 Qb7+ Kf8
00:01:43.4	-0,93	13	74510014	Kb3 Ba4+ Kxa4 Qxc2+ Kb4 Qxg2 Qe7 Qb2+ Ka4 Qa2+ Kb4
Qd2+ Kb3 Qd1+ Kb4 Qb1+ Kc5 Qb8 exf5 gxf5 Qe6+ Kg7 Qxf5
00:02:10.3	-0,93	14	92548320	Kb3 Ba4+ Kxa4 Qxc2+ Kb4 Qxg2 Qe7 Qb2+ Ka4 Qa2+ Kb4
Qd2+ Kb3 Qd1+ Kb4 Qb1+ Kc5 Qb8 exf5 gxf5 Qe6+ Kg7 Qxa6
00:03:08.1	-0,93	15	134506836	Kb3 Ba4+ Kxa4 Qxc2+ Kb4 fxe4 Qe7 Qb2+ Ka4 Qa1+ Kb3
Qb1+ Kc3 Qe1+ Kb3 Qd1+ Kc3 Qd4+ Kb4 Qd2+ Kb3 Qd3+ Kb2 Qd4+ Kb3 Qe3+ Kb4
00:06:30.9	-0,90	16	287624949	Kb3 Ba4+ Kxa4 Qxc2+ Kb4 fxe4 Qe7 Qb2+ Ka4 Qa1+ Kb3
Qb1+ Kc3 Qc1+ Kb4 Qe1+ Ka4 Qd1+ Ka3 Qd3+ Kb2 Qd4+ Kb3 Ng7 Qd8+ Kf7 Qc7+ Kf8 Qd6+
Kf7 Qxa6 exf3
00:17:29.9	-0,85	17	799131012	Kb3 Ba4+ Kxa4 Qxc2+ Kb4 Qd2+ Ka4 Qd1+ Kb4 Qe1+ Ka4
Qa1+ Kb4 Qb1+ Ka4 Qa2+ Kb4 Qb2+ Ka4 fxe4 Qe7 Qa1+ Kb3 Qb1+ Kc3 Qc1+ Kb4 Qd2+ Kb3
Qd3+ Kb4 Ng7
01:24:48.8	-0,50	18	3868528348	Kb3 Kf7 exf5 Ba4+ Kxa4 Qxc2+ Kb4 Qd2+ Ka4 Qa2+
Kb4 gxf5 Qa7+ Kg6 Qxa6+ Nf6 Qe6 Qb2+ Ka4 h5 d6 Qxg2 Qxe5 Qc2+ Kb4 Qb1+ Ka4 Qd1+

ChessTiger 2004:
00:00:00.0	-1,26	1	71	exf5 Qe1+ Kb3 gxf5
00:00:00.0	-1,10	1	140	Qe7 Qe3+ Bd3 fxe4 fxe4
00:00:00.0	-1,06	1	179	d6
00:00:00.0	-1,10	2	485	d6 Qe1+ Kb3
00:00:00.0	-1,10	3	1014	d6 Qe1+ Kb3
00:00:00.0	-1,06	3	1448	exf5 Qe1+ Kb3 gxf5 d6
00:00:00.0	-1,06	4	1998	exf5 Qe1+ Kb3 gxf5 d6
00:00:00.0	-1,46	5	16650	d6 Qe1+ Kb3 Qd2 exf5 Nxd6 fxg6 hxg6 Bxg6
00:00:00.1	-1,46	6	33067	d6 Qe1+ Kb3 Qd2 exf5 Nxd6 fxg6 hxg6 Bxg6
00:00:00.2	-1,62	7	72573	d6 fxe4 fxe4 Nf6 Kd3 Qf1+ Kc3 Qe1+ Kb3 Nxe4 Qxe5
00:00:00.3	-1,83	8	222399	Qb6 Qa1+ Kd2 Qf1 Bd3 Qxg2+ Be2 fxe4 fxe4 Qxe4
00:00:00.7	-1,80	8	532233	Kd3 h6 Qe7 fxe4+ fxe4 Qf1+ Kc3 Qa1+ Kd2 Qxa5+ Ke2
00:00:01.1	-1,74	9	936978	Kd3 f4 Qa7 Nd6 Bb3 Qf1+ Kc3 Qe1+ Kd3
00:00:01.8	-2,18	10	1623337	Qb6 fxe4 fxe4 Ba4 Qb1 Qa3+ Kd2 Bxc2 Qxc2 Qxa5+ Ke2
Nd6 c5
00:00:03.5	-1,78	10	3276143	Qb4 Kf7 Kb3 fxe4 fxe4 Qe3+ Qc3 Ba4+ Kb4 Qxc3+ Kxc3
Bxc2 Kxc2
00:00:04.8	-1,66	11	4599243	Qb4 Kf7 Kb3 fxe4 fxe4 Qe3+ Qc3 Ba4+ Kb4 Qxc3+ Kxc3
Bxc2 Kxc2 Nd6
00:00:08.6	-1,66	12	8418865	Qb4 Kf7 Kb3 fxe4 fxe4 Qe3+ Qc3 Ba4+ Kb4 Qxc3+ Kxc3
Bxc2 Kxc2 Nd6 Kd3
00:00:17.5	-1,68	13	17181916	Qb4 Kf7 Kb3 fxe4 fxe4 Qe3+ Kb2 Qd4+ Kb3 Nc7 Qb6
Ba4+ Kb4 Qb2+ Kxa4 Qxc2+ Kb4 Qd2+
00:00:38.0	-1,70	14	38039253	Qb4 Kf7 Kb3 fxe4 fxe4 Qe3+ Kb2 Qd4+ Kb3 Nc7 Qd6
Ba4+ Kb4 Qd2+ Kxa4 Qxc2+ Kb4 Qd2+ Ka4
00:02:24.0	-1,52	15	141995387	Qb4 Kf7 Kb3 fxe4 fxe4 Qe3+ Kb2 Qd4+ Kb3 Nc7 Qd6
Ba4+ Kb4 Qd2+ Kxa4 Qxc2+ Kb4 Qd2+
00:15:43.7	-1,33	16	924093568	Qb4 fxe4 fxe4 Nf6 c5 Bg4 Kb3 Bd1 Bxd1 Qxd1+ Kb2
Qe2+ Ka3
00:23:00.4	-1,82	17	1372222734	Qb4 fxe4 fxe4 Nf6 c5 Bg4 Kb3 Bd1 Bxd1 Qxd1+ Kb2
Qe2+ Ka3 Nxe4



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