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Subject: Re: Nice mate in 8 for engines!

Author: Ingo Bauer

Date: 05:14:04 12/27/03

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Hi

>[D]5rk1/p4p1p/6b1/q7/6P1/1P6/Q4p1P/K1R5 b - -

YACE find the mate with all 5 Pcs. TBs but it need longer than Chest without TBS
on the same Hardware! :-)

I am showing hash_found/hash_probe as Hash
Loaded 36 bitbases of size 14784644, 0 failed
Engine: Yace Paderborn BB
by Dieter Buerssner
 10/30	 0:00 	+17.81++	1...Qe1 2.Qb1 Bxb1 3.Rxb1 Rc8 4.b4 Rc1 5.Ka2 f1Q 6.Ka3
(1.510.893) 1682.5
 10/30	 0:01 	+19.02	1...Qe1 2.Qb2 Rc8 3.Ka2 Rxc1 4.Qd4 Qa5+ 5.Qa4 Qxa4+ 6.bxa4
f1Q (2.549.340) 1597.3
 10/33	 0:02 	+19.02	1...Qe1 2.Qb2 Rc8 3.Ka2 Rxc1 4.Qd4 Qa5+ 5.Qa4 Qxa4+ 6.bxa4
f1Q (4.040.102) 1644.9
 11/33	 0:02 	+19.42++	1...Qe1 2.Qb2 Rc8 3.b4 Rxc1+ 4.Ka2 f1Q 5.h3 (4.445.949)
1641.1
 11/34	 0:06 	+20.12	1...Qe1 2.Qb1 Bxb1 3.Kb2 Be4 4.Rxe1 fxe1Q 5.Ka3 a5 6.b4 Rb8
7.b5 (10.738.024) 1549.9
 11/38	 0:29 	+20.12	1...Qe1 2.Qb1 Bxb1 3.Kb2 Be4 4.Rxe1 fxe1Q 5.Ka3 a5 6.b4 Rb8
7.b5 (45.914.391) 1560.1
 12/38	 0:29 	+20.52++	1...Qe1 2.Qb1 Bxb1 3.Rc5 (46.674.398) 1560.1
 12/38	 0:34 	+21.52++	1...Qe1 2.Qb1 Bxb1 3.Kb2 Re8 4.Rd1 (53.361.859) 1534.6
 12/38	 0:35 	+26.52++	1...Qe1 2.Qb1 Bxb1 3.Kb2 Re8 4.Rc2 f1Q 5.b4 Bxc2 6.h3
(54.792.327) 1525.7
 12/38	 0:48 	+30.38	1...Qe1 2.Qb1 Bxb1 3.Kb2 Re8 4.Rc2 Bxc2 5.h4 Re3 6.Ka3 Qc3
7.Ka4 Bxb3+ 8.Ka3 f1Q (72.364.336) 1507.4
 12/47	 5:45 	+30.38	1...Qe1 2.Qb1 Bxb1 3.Kb2 Re8 4.Rc2 Bxc2 5.h4 Re3 6.Ka3 Qc3
7.Ka4 Bxb3+ 8.Ka3 f1Q (539.873.585) 1562.5
 13/47	 5:52 	+30.78++	1...Qe1 2.Qb1 Bxb1 3.b4 Qxc1 4.b5 (551.056.731) 1562.2
 13/47	 5:53 	+31.78++	1...Qe1 2.Qc2 Bxc2 3.Rd1 f1Q 4.h3 (552.205.997) 1562.0
 13/47	 5:53 	  +M15++	1...Qe1 2.Qa3 Rc8 3.b4 f1Q 4.Ka2 Qa6 5.Rxe1 Rc2+ 6.Kb3
Rc3+ 7.Kxc3 Qd3+ 8.Kb2 Qd2+ 9.Ka1 Qxe1+ 10.Kb2 Qd2+ 11.Ka1 Qd1+ 12.Kb2 Qb1+
13.Kc3 Qd3+ 14.Kb2 (552.210.883) 1562.0
 13/47	 6:07 	  +M8 	1...Qe1 2.Kb2 Qxc1+ 3.Kxc1 f1Q+ 4.Kd2 Rc8 5.Ke3 Rc3+ 6.Kd2
Rd3+ 7.Kc2 Qe2+ 8.Kb1 Rd1+ (587.011.984) 1598.8
 13/47	 6:18 	  +M8 	1...Qe1 2.Kb2 Qxc1+ 3.Kxc1 f1Q+ 4.Kd2 Rc8 5.Ke3 Rc3+ 6.Kd2
Rd3+ 7.Kc2 Qe2+ 8.Kb1 Rd1+ (614.807.964) 1625.7
 14/47	 6:32 	  +M8 	1...Qe1 2.Kb2 Qxc1+ 3.Kxc1 f1Q+ 4.Kd2 Rc8 5.Ke3 Rc3+ 6.Kd2
Rd3+ 7.Kc2 Qe2+ 8.Kb1 Rd1+ (654.599.309) 1669.5
 14/47	 6:52 	  +M8 	1...Qe1 2.Kb2 Qxc1+ 3.Kxc1 f1Q+ 4.Kd2 Rc8 5.Ke3 Rc3+ 6.Kd2
Rd3+ 7.Kc2 Qe2+ 8.Kb1 Rd1+ (706.222.957) 1713.8
 15/47	 7:15 	  +M8 	1...Qe1 2.Kb2 Qxc1+ 3.Kxc1 f1Q+ 4.Kd2 Rc8 5.Ke3 Rc3+ 6.Kd2
Rd3+ 7.Kc2 Qe2+ 8.Kb1 Rd1+ (772.863.455) 1772.8
 15/47	 7:44 	  +M8 	1...Qe1 2.Kb2 Qxc1+ 3.Kxc1 f1Q+ 4.Kd2 Rc8 5.Ke3 Rc3+ 6.Kd2
Rd3+ 7.Kc2 Qe2+ 8.Kb1 Rd1+ (852.729.794) 1834.8
interior recognizer probes 57811, found 57808 egtb probes 28, found 28 max_depth
47
best move: Qa5-e1 time: 7:44.748 min  n/s: 1.834.865  nodes: 852.729.794 TB: 28

Ingo

>Engine: ChestUCI Ver.2.8
>by HM / FH
>CPU: AthlonXP2200+
>FEN: 5rk1/p4p1p/6b1/q7/6P1/1P6/Q4p1P/K1R5 b - -
>Suche nach Matt in 12 ... (Hash=512MB)
>8.38 5:21 +M8 33...Qe1 335.3
>Matt in 8 gefunden ! (1 Lösung in 05:44)
>8/08 5:44 +M8 33...Qe1 34.Kb2 Qxc1+ 35.Kxc1 f1Q+ 36.Kb2 Rc8 37.Qa1 Qf6+ 38.Ka2
>Qa6+ 39.Kb2 Rc2+ 40.Kb1 Qf1+ 330.5
>best move: Qa5-e1 time: 5:44.282 min n/s: 330.550 nodes: 113.729.719



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