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Subject: Re: Mate in 22....Engine test....etc.

Author: John Merlino

Date: 09:11:59 05/04/04

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On May 04, 2004 at 10:19:39, Rob Basham wrote:

>[D]5n2/B3K3/2p3p1/4k1N1/7P/3bN1P1/2Prn1P1/1q6 w - - 0 1
>
>Ruffian 1.0.1 announces mate in 22 in only 12 seconds!
>
>P3/850
>
>This should be a good test...

CM_SKR on a P4-2.4 announces Mate in 22 in less than one second. Note, however,
that The King's maximum PV length is 31 ply, which is why the full PV for the
mate is not listed.

Time	Depth	Score	Positions	Moves
0:00	1/3	4.07	3991		1.Nf3+ Ke4 2.Nxd2+ Ke5 3.Nxb1 Bxc2
					4.Bb8+ Kd4 5.Nxc2+ Kd3
0:00	1/3	4.23	7227		1.Nf7+ Ke4 2.Nd6+ Ke5 3.Ng4+ Kd5
					4.c4+ Bxc4 5.Ne3+ Ke5 6.Ndxc4+
					Ke4 7.Nxd2+ Kd3 8.Nxb1
0:00	1/4	4.34	19627		1.Nf7+ Ke4 2.Nd6+ Ke5 3.Ng4+ Kd5
					4.c4+ Bxc4 5.Ne3+ Ke5 6.Ndxc4+
					Ke4 7.Nxd2+ Ke5 8.Nxb1 Ne6
0:00	1/5	4.12	60398		1.Nf7+ Ke4 2.Nd6+ Ke5 3.Ng4+ Kd5
					4.c4+ Bxc4 5.Ne3+ Ke5 6.Ndxc4+
					Ke4 7.Nxd2+ Ke5 8.Nxb1 Ne6 9.Ng4+
					Kf5
0:00	1/5	4.59	86152		1.Nf3+ Ke4 2.Nxd2+ Ke5 3.Nxb1 Bxc2
					4.Bb8+ Ke4 5.Nxc2 Nh7 6.Bd6
0:00	1/6	Mate22	170133		1.Nf3+ Ke4 2.Nxd2+ Ke5 3.Nf3+ Ke4
					4.Ng5+ Ke5 5.Nf7+ Ke4 6.Nd6+ Ke5
					7.Ng4+ Kd5 8.Nf6+ Ke5 9.Nf7+ Kf5
					10.Nh6+ Ke5 11.Nhg4+ Kf5 12.Ne3+
					Ke5 13.Nfg4+ Ke4 14.Nf2+ Ke5 15.Nxd3+
					Ke4 16.Nf2+
0:01	1/7	Mate22	397306		1.Nf3+ Ke4 2.Nxd2+ Ke5 3.Nf3+ Ke4
					4.Ng5+ Ke5 5.Nf7+ Ke4 6.Nd6+ Ke5
					7.Ng4+ Kd5 8.Nf6+ Ke5 9.Nf7+ Kf5
					10.Nh6+ Ke5 11.Nhg4+ Kf5 12.Ne3+
					Ke5 13.Nfg4+ Ke4 14.Nf2+ Ke5 15.Nxd3+
					Ke4 16.Nf2+
0:02	1/8	Mate22	922677		1.Nf3+ Ke4 2.Nxd2+ Ke5 3.Nf3+ Ke4
					4.Ng5+ Ke5 5.Nf7+ Ke4 6.Nd6+ Ke5
					7.Ng4+ Kd5 8.Nf6+ Ke5 9.Nf7+ Kf5
					10.Nh6+ Ke5 11.Nhg4+ Kf5 12.Ne3+
					Ke5 13.Nfg4+ Ke4 14.Nf2+ Ke5 15.Nxd3+
					Ke4 16.Nf2+
0:06	1/9	Mate22	2061656		1.Nf3+ Ke4 2.Nxd2+ Ke5 3.Nf3+ Ke4
					4.Ng5+ Ke5 5.Nf7+ Ke4 6.Nd6+ Ke5
					7.Ng4+ Kd5 8.Nf6+ Ke5 9.Nf7+ Kf5
					10.Nh6+ Ke5 11.Nhg4+ Kf5 12.Ne3+
					Ke5 13.Nfg4+ Ke4 14.Nf2+ Ke5 15.Nxd3+
					Ke4 16.Nf2+

jm



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