Author: Tord Romstad
Date: 07:39:12 05/04/04
Go up one level in this thread
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...
Not really. The only thing you test with this kind of artificial position is
whether the engine has checks in the qsearch.
Gothmog (P4 2.4 GHz) announces mate in at most 24 after 1.24 seconds, and mate
in 22 after 1.96 seconds:
1 1.69 0.00 683 Ng4+ Kf5 Ne3+
2 4.06 0.02 2388 Nf7+ Ke4 Nd6+ Ke5 Ng4+ Kd5 c4+ Bxc4 Ne3+
Ke5 Ndxc4+ Ke4 Nxd2+ Ke5 Nxb1
3 4.06 0.05 5823 Nf7+ Ke4 Nd6+ Ke5 Ng4+ Kd5 c4+ Bxc4 Ne3+
Ke5 Ndxc4+ Ke4 Nxd2+ Ke5 Nxb1
4 4.06 0.11 15393 Nf7+ Ke4 Nd6+ Ke5 Ng4+ Kd5 c4+ Bxc4 Ne3+
Ke5 Ndxc4+ Ke4 Nxd2+ Ke5 Nxb1
5 4.03 0.31 52810 Nf7+ Ke4 Ng5+ Ke5
6 >= 4.03 0.32 54292 Nf7+ Ke4 Ng5+ Ke5
6 >= 4.06 0.43 82868 Nf7+ Ke4 Nd6+ Ke5 Ng4+ Kd5 c4+ Bxc4 Ne3+
Ke5 Ndxc4+ Ke4 Nxd2+ Ke5 Nxb1 Ne6 Bb8+
6 >= 4.19 0.43 82932 Nf7+ Ke4 Nd6+ Ke5 Ng4+ Kd5 c4+ Bxc4 Ne3+
Ke5 Ndxc4+ Ke4 Nxd2+ Ke5 Nxb1 Ne6 Bb8+
6 <= 4.44 0.70 145745 Nf7+ Ke4 Nd6+ Ke5 Ng4+ Kd5 c4+ Bxc4 Ne3+
Ke5 Ndxc4+ Ke4 Nxd2+ Ke5 Nxb1 Ne6 Bb8+
Kd4 Kxe6
6 <= 4.38 0.70 146265 Nf7+ Ke4 Nd6+ Ke5 Ng4+ Kd5 c4+ Bxc4 Ne3+
Ke5 Ndxc4+ Ke4 Nxd2+ Ke5 Nxb1 Ne6 Bb8+
Kd4 Kxe6
6 <= 4.31 0.71 149081 Nf7+ Ke4 Nd6+ Ke5 Ng4+ Kd5 c4+ Bxc4 Ne3+
Ke5 Ndxc4+ Ke4 Nxd2+ Ke5 Nxb1 Ne6 Bb8+
Kd4 Kxe6
6 <= 4.19 0.73 152215 Nf7+ Ke4 Nd6+ Ke5 Ng4+ Kd5 c4+ Bxc4 Ne3+
Ke5 Ndxc4+ Ke4 Nxd2+ Ke5 Nxb1 Ne6 Bb8+
Kd4 Kxe6
6 4.19 0.73 152215 Nf7+ Ke4 Nd6+ Ke5 Ng4+ Kd5 c4+ Bxc4 Ne3+
Ke5 Ndxc4+ Ke4 Nxd2+ Ke5 Nxb1 Ne6 Bb8+
Kd4 Kxe6
7 >= 4.19 0.74 152433 Nf7+ Ke4 Nd6+ Ke5 Ng4+ Kd5 c4+ Bxc4 Ne3+
Ke5 Ndxc4+ Ke4 Nxd2+ Ke5 Nxb1 Ne6 Bb8+
Kd4 Kxe6
7 >= 4.22 1.09 230936 Nf7+ Ke4 Ng5+ Ke5
7 >= #24 1.24 273358 Nf7+ Ke4 Ng5+ Ke5
7 >= #22 1.96 435950 Nf3+ Ke4 Nxd2+ Ke5 Nf3+ Ke4 Ng5+ Ke5 Nf7+
Ke4 Nd6+ Ke5 Ng4+ Kd5 Nf6+ Ke5 Nf7+ Kf5
Nh6+ Ke5 Nhg4+ Kf5 Ne3+ Ke5 Nfg4+ Ke4 Nf2+
Ke5 Nxd3+ Ke4 Nf2+ Ke5 Nfg4+ Ke4 Nf6+ Ke5
Nc4+ Kf5 Nd6+ Ke5 Ng4+ Kd5 c4#
7 <= #22 2.45 569150 Nf3+ Ke4 Nxd2+ Ke5 Nf3+ Ke4 Ng5+ Ke5 Nf7+
Ke4 Nd6+ Ke5 Ng4+ Kd5 Nf6+ Ke5 Nf7+ Kf5
Nh6+ Ke5 Nhg4+ Kf5 Ne3+ Ke5 Nfg4+ Ke4 Nf2+
Ke5 Nxd3+ Ke4 Nf2+ Ke5 Nfg4+ Ke4 Nf6+ Ke5
Nc4+ Kf5 Nd6+ Ke5 Ng4+ Kd5 c4#
7 #22 2.46 569150 Nf3+ Ke4 Nxd2+ Ke5 Nf3+ Ke4 Ng5+ Ke5 Nf7+
Ke4 Nd6+ Ke5 Ng4+ Kd5 Nf6+ Ke5 Nf7+ Kf5
Nh6+ Ke5 Nhg4+ Kf5 Ne3+ Ke5 Nfg4+ Ke4 Nf2+
Ke5 Nxd3+ Ke4 Nf2+ Ke5 Nfg4+ Ke4 Nf6+ Ke5
Nc4+ Kf5 Nd6+ Ke5 Ng4+ Kd5 c4#
Tord
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