Author: Tim Foden
Date: 11:36:11 02/04/01
Go up one level in this thread
On February 04, 2001 at 09:13:28, leonid wrote:
>If you like to solve one forced mate...
>
>[D]6R1/r3P1b1/6kN/1bP1P1np/3P1B1p/4P3/pq4N1/r1n3QK w - -
>
>Please indicate you result.
Green Light Chess v2.13-pr1, 800MHz Duron, 24MB hash.
This one's too easy Leonid!
GLC finds a mate in 8 in 0.15 seconds (but doesn't find anything shorter evan
after a 14 ply search)
>anal
Game stage: Opening
Current eval: -5.06
Ply Time Score Nodes Principal Variation
4 0.02 3.16 6456 Nxh4+ Kh7 Rxg7+ Kh8 Rg8+ Kh7 Qxg5
4 0.02 3.16 7411 Nxh4+ Kh7 Rxg7+ Kh8 Rg8+ Kh7 Qxg5
5 0.07 -- 17634 Nxh4+ (a=2.66 b=3.66 e=2.66)
5 0.10 2.58 26469 Nxh4+ Kh7 Rxg7+ Kh8 e8=Q+ Bxe8 Rxa7 Nd3
5 0.11 2.58 30172 Nxh4+ Kh7 Rxg7+ Kh8 e8=Q+ Bxe8 Rxa7 Nd3
6 0.13 ++ 37281 Nxh4+ (a=2.08 b=3.08 e=3.08)
6 0.15 320.85 45039 Nxh4+ Kh7 Rxg7+ Kh8 Nf7+ Kxg7 Qxg5+ Kxf7 Qf6+ Ke8
Qf8+ Kd7 e8=Q+ Kc7 Qc8#
6 0.18 320.85 59078 Nxh4+ Kh7 Rxg7+ Kh8 Nf7+ Kxg7 Qxg5+ Kxf7 Qf6+ Ke8
Qf8+ Kd7 e8=Q+ Kc7 Qc8#
7 0.24 320.85 96192 Nxh4+ Kh7 Rxg7+ Kh8 Nf7+ Kxg7 Qxg5+ Kxf7 Qf6+ Ke8
Qf8+ Kd7 e8=Q+ Kc7 Qc8#
7 0.35 320.85 157179 Nxh4+ Kh7 Rxg7+ Kh8 Nf7+ Kxg7 Qxg5+ Kxf7 Qf6+ Ke8
Qf8+ Kd7 e8=Q+ Kc7 Qc8#
8 0.51 320.85 261173 Nxh4+ Kh7 Rxg7+ Kh8 Nf7+ Kxg7 Qxg5+ Kxf7 Qf6+ Ke8
Qf8+ Kd7 e8=Q+ Kc7 Qc8#
8 0.96 320.85 549576 Nxh4+ Kh7 Rxg7+ Kh8 Nf7+ Kxg7 Qxg5+ Kxf7 Qf6+ Ke8
Qf8+ Kd7 e8=Q+ Kc7 Qc8#
9 1.32 320.85 786366 Nxh4+ Kh7 Rxg7+ Kh8 Nf7+ Kxg7 Qxg5+ Kxf7 Qf6+ Ke8
Qf8+ Kd7 e8=Q+ Kc7 Qc8#
9 2.14 320.85 1305139 Nxh4+ Kh7 Rxg7+ Kh8 Nf7+ Kxg7 Qxg5+ Kxf7 Qf6+ Ke8
Qf8+ Kd7 e8=Q+ Kc7 Qc8#
10 3.03 320.85 1921625 Nxh4+ Kh7 Rxg7+ Kh8 Nf7+ Kxg7 Qxg5+ Kxf7 Qf6+ Ke8
Qf8+ Kd7 e8=Q+ Kc7 Qc8#
10 4.91 320.85 3170422 Nxh4+ Kh7 Rxg7+ Kh8 Nf7+ Kxg7 Qxg5+ Kxf7 Qf6+ Ke8
Qf8+ Kd7 e8=Q+ Kc7 Qc8#
11 4.96 0/31 Nxh4+ >exit
local: t=5.20 nps=647585.2 n=3366148 (f=957293 q=2408855)
total: t=5.20 nps=647585.2 n=3366148 draws=1442
trans: probes=716219 hits=178255 (24.89%) draft=58864 (8.22%)
tcuts: exact=49 (0.01%) upper=21103 (2.95%) lower=34051 (4.75%)
tstor: exact=180 (0.05%) upper=212574 (62.45%) lower=127657 (37.50%)
ext: check=383012 recap=5040 ppush=10934 1rep=32249 thrt=0
q-moves: gen=1106831 tested=353580 made/un=3263 max-dep=6
max eval diff: part-1=1.26 part-2=1.05
>
------------------------------
Following the same idea as Uri Bass, I gave GLC the position with black to move.
Mate in 10 after 17.20,
Mate in 9 after 48.92,
Mate in 8 after 2:40,
Here is GLC's analysis output:
>anal
Game stage: Opening
Current eval: 5.06
Ply Time Score Nodes Principal Variation
4 0.04 5.83 6594 Nd3 Nxh4+ Kh7 Rxg7+ Kxg7 N4f5+ Kh8
4 0.07 5.83 11202 Nd3 Nxh4+ Kh7 Rxg7+ Kxg7 N4f5+ Kh8
5 0.08 ++ 14416 Nd3 (a=5.33 b=6.33 e=6.33)
5 0.10 7.84 19112 Nd3 Nxh4+ Kh7 Rxg7+ Kxg7 N4f5+ Kh7 e8=Q
5 0.11 7.84 23127 Nd3 Nxh4+ Kh7 Rxg7+ Kxg7 N4f5+ Kh7 e8=Q
6 0.14 ++ 32538 Nd3 (a=7.34 b=8.34 e=8.34)
6 0.18 9.80 49585 Nd3 Nxh4+ Kh7 Rxg7+ Kxg7 N6f5+ Kh7 Qxa1 Qxa1+ Kg2
6 0.21 9.80 62040 Nd3 Nxh4+ Kh7 Rxg7+ Kxg7 N6f5+ Kh7 Qxa1 Qxa1+ Kg2
7 0.30 ++ 95602 Nd3 (a=9.30 b=10.30 e=10.30)
7 0.56 14.15 209743 Nd3 Nxh4+ Kh7 Rxg7+ Kxg7 N4f5+ Kh7 Qxa1 Qxa1+ Kg2
Qb2+ Kg3
7 0.63 14.15 243910 Nd3 Nxh4+ Kh7 Rxg7+ Kxg7 N4f5+ Kh7 Qxa1 Qxa1+ Kg2
Qb2+ Kg3
8 1.07 ++ 422634 Nd3 (a=13.65 b=14.65 e=14.65)
8 2.90 17.60 1294405 Nd3 Nxh4+ Kxh6 Bxg5+ Kh7 Rxg7+ Kxg7 Bf6+ Kh7 Qxa1
Qxa1+ Kg2 Qb2+ Kh3 a1=Q
8 3.20 17.60 1461781 Nd3 Nxh4+ Kxh6 Bxg5+ Kh7 Rxg7+ Kxg7 Bf6+ Kh7 Qxa1
Qxa1+ Kg2 Qb2+ Kh3 a1=Q
9 4.89 ++ 2189090 Nd3 (a=17.10 b=18.10 e=18.10)
9 17.20 320.81 9361996 Nd3 Nxh4+ Kh7 Rxg7+ Kxg7 N6f5+ Kh7 Nf3 Rxg1+ Nxg1
Bc6+ d5 Bxd5+ e4 Bxe4+ Nf3 Bxf3+ Kg1 Qg2#
9 18.14 320.81 9980953 Nd3 Nxh4+ Kh7 Rxg7+ Kxg7 N6f5+ Kh7 Nf3 Rxg1+ Nxg1
Bc6+ d5 Bxd5+ e4 Bxe4+ Nf3 Bxf3+ Kg1 Qg2#
10 19.73 320.81 10965k Nd3 Nxh4+ Kh7 Rxg7+ Kxg7 e8=N+ Kf8 Nf3 Rxg1+ Nxg1
Bc6+ d5 Bxd5+ e4 Bxe4+ Nf3 Bxf3+ Kg1 Qg2#
10 39.85 320.81 25949k Nd3 Nxh4+ Kh7 Rxg7+ Kxg7 e8=N+ Kf8 Nf3 Rxg1+ Nxg1
Bc6+ d5 Bxd5+ e4 Bxe4+ Nf3 Bxf3+ Kg1 Qg2#
11 48.92 320.83 31432k Nd3 Nxh4+ Kh7 Rxg7+ Kxg7 e8=N+ Kf8 Nf3 Rxg1+ Nxg1
a1=Q e4 Qxg1+ Kxg1 Ra1+ Bc1 Rxc1#
11 2:40 320.85 116755k Ne2 Nxh4+ Kh7 Kh2 Nxg1+ Ng2 N1f3+ Kg3 Ne4+ Kxf3 Rf1+
Kxe4 Qxg2+ Kf5 Qg6#
11 2:42 320.85 117953k Ne2 Nxh4+ Kh7 Kh2 Nxg1+ Ng2 N1f3+ Kg3 Ne4+ Kxf3 Rf1+
Kxe4 Qxg2+ Kf5 Qg6#
12 3:03 320.85 130759k Ne2 Nxh4+ Kh7 Kh2 Nxg1+ Ng2 N1f3+ Kg3 Ne4+ Kxf3 Rf1+
Kxe4 Qxg2+ Kf5 Qg6#
12 3:16 320.85 139576k Ne2 Nxh4+ Kh7 Kh2 Nxg1+ Ng2 N1f3+ Kg3 Ne4+ Kxf3 Rf1+
Kxe4 Qxg2+ Kf5 Qg6#
13 4:00 320.85 166470k Ne2 Nxh4+ Kh7 Kh2 Nxg1+ Ng2 N1f3+ Kg3 Ne4+ Kxf3 Rf1+
Kxe4 Qxg2+ Kf5 Qg6#
13 4:28 320.85 186214k Ne2 Nxh4+ Kh7 Kh2 Nxg1+ Ng2 N1f3+ Kg3 Ne4+ Kxf3 Rf1+
Kxe4 Qxg2+ Kf5 Qg6#
14 4:28 0/42 Ne2 >exit
local: t=4:37 nps=697046.9 n=193255547 (f=50953081 q=142302466)
total: t=4:37 nps=697046.9 n=193255547 draws=68039
trans: probes=31916157 hits=2922776 (9.16%) draft=1905743 (5.97%)
tcuts: exact=518 (0.00%) upper=911571 (2.86%) lower=662667 (2.08%)
tstor: exact=1612 (0.01%) upper=10286667 (64.40%) lower=5685606 (35.59%)
ext: check=18664832 recap=168053 ppush=154233 1rep=1895293 thrt=0
q-moves: gen=104522880 tested=17873089 made/un=588453 max-dep=9
max eval diff: part-1=3.00 part-2=1.19
>quit
Cheers, Tim.
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