Author: Tim Foden
Date: 13:55:13 09/25/03
Go up one level in this thread
On September 25, 2003 at 12:08:17, Will Singleton wrote:
>[D]6k1/8/p3p2p/2Q5/1N2qp2/8/5K2/8 b - - 0 47
>
>Black has the option of Qe3+, going into a 3 pawns vs knight game. It appears
>from analysis that after the queens are off, white cannot stop all the pawns. I
>don't know whether it's possible to win without trading queens (doesn't look
>like it), but it appears certain that Qe3+ will win. However, programs are
>reluctant to play it.
GLC 3.00 isn't very reluctant. It probably scores these passed pawns a bit
high, but there you go! :)
It likes it from 0 seconds.
Cheers, Tim.
Analysis (AXP 1.67GHz, 24MB hash)...
Game stage: Endgame
Current eval: 1.317
Ply Time Score Nodes Principal variation
6 0.010 +1.872 5455 Qe3+ 2. Qxe3 fxe3+ 3. Kxe3 a5 4. Nc6 a4 5. Ne5
6 0.020 +1.872 22928 Qe3+ 2. Qxe3 fxe3+ 3. Kxe3 a5 4. Nc6 a4 5. Ne5
7 0.030 +1.937 26512 Qe3+ 2. Qxe3 fxe3+ 3. Kxe3 a5 4. Nd3 Kg7 5. Ne5 a4
7 0.050 +1.937 57049 Qe3+ 2. Qxe3 fxe3+ 3. Kxe3 a5 4. Nd3 Kg7 5. Ne5 a4
8 0.060 +1.886 66631 Qe3+ 2. Qxe3 fxe3+ 3. Kxe3 a5 4. Nd3 Kg7 5. Ne5 a4
6. Kd4
Generating internal KP-K end-game table...
Done (0.181 secs)
8 0.311 +1.886 144431 Qe3+ 2. Qxe3 fxe3+ 3. Kxe3 a5 4. Nd3 Kg7 5. Ne5 a4
6. Kd4
9 0.331 +2.286 164515 Qe3+ {++} 2. Qxe3 fxe3+ 3. Kxe3 a5 4. Nd3 a4 5.
Ne5 a3 6. Nd3 a2 7. Ne5
9 0.351 +2.404 181347 Qe3+ 2. Qxe3 fxe3+ 3. Kxe3 a5 4. Nc2 Kf7 5. Ke4
Kf6 6. Nd4 a4
9 0.391 +2.404 234139 Qe3+ 2. Qxe3 fxe3+ 3. Kxe3 a5 4. Nc2 Kf7 5. Ke4
Kf6 6. Nd4 a4
10 0.421 +2.246 273278 Qe3+ 2. Qxe3 fxe3+ 3. Kxe3 a5 4. Nc2 Kf7 5. Na3
Kf6 6. Nc4 a4 7. Nd6
10 0.581 +2.246 464643 Qe3+ 2. Qxe3 fxe3+ 3. Kxe3 a5 4. Nc2 Kf7 5. Na3
Kf6 6. Nc4 a4 7. Nd6
11 3.575 +1.846 3790164 Qe3+ {--} 2. Qxe3 fxe3+ 3. Kxe3 a5 4. Nc2 Kf7 5.
Kd3 a4 6. Kc4 h5 7. Kb5 e5 8. Kxa4
11 3.626 +1.847 3843950 Qe3+ {++} 2. Qxe3 fxe3+ 3. Kxe3 a5 4. Nc2 Kf7 5.
Kd3 a4 6. Kc4 h5 7. Kb5 e5
11 3.636 +1.814 3853079 Qe3+ 2. Qxe3 fxe3+ 3. Kxe3 a5 4. Nc2 Kf7 5. Kd3 h5
6. Kc4 h4 7. Kb5 h3 8. Kxa5
11 4.937 +1.814 5403791 Qe3+ 2. Qxe3 fxe3+ 3. Kxe3 a5 4. Nc2 Kf7 5. Kd3 h5
6. Kc4 h4 7. Kb5 h3 8. Kxa5
12 5.128 +1.636 5620587 Qe3+ 2. Qxe3 fxe3+ 3. Kxe3 a5 4. Nc2 a4 5. Kf4 Kg7
6. Ke5 h5 7. Nd4 a3 8. Nxe6+ Kg6
12 14.812 +1.636 15995k Qe3+ 2. Qxe3 fxe3+ 3. Kxe3 a5 4. Nc2 a4 5. Kf4 Kg7
6. Ke5 h5 7. Nd4 a3 8. Nxe6+ Kg6
13 15.292 +1.987 16496k Qe3+ 2. Qxe3 fxe3+ 3. Kxe3 a5 4. Nd3 a4 5. Kd2 h5
6. Kc3 h4 7. Kb4 h3 8. Kxa4 h2 9. Nf2
13 20.500 +1.987 22227k Qe3+ 2. Qxe3 fxe3+ 3. Kxe3 a5 4. Nd3 a4 5. Kd2 h5
6. Kc3 h4 7. Kb4 h3 8. Kxa4 h2 9. Nf2
14 21.351 +1.959 23134k Qe3+ 2. Qxe3 fxe3+ 3. Kxe3 a5 4. Nd3 a4 5. Kd4 h5
6. Kc4 h4 7. Nf2 h3 8. Nxh3 a3
14 34.230 +1.959 37425k Qe3+ 2. Qxe3 fxe3+ 3. Kxe3 a5 4. Nd3 a4 5. Kd4 h5
6. Kc4 h4 7. Nf2 h3 8. Nxh3 a3
15 36.433 +1.718 39837k Qe3+ 2. Qxe3 fxe3+ 3. Kxe3 a5 4. Nd3 a4 5. Kd4 h5
6. Kc4 h4 7. Nf2 e5 8. Kb4 Kf7 9. Kxa4 Kf6
15 1:33.35 +1.718 100487k Qe3+ 2. Qxe3 fxe3+ 3. Kxe3 a5 4. Nd3 a4 5. Kd4 h5
6. Kc4 h4 7. Nf2 e5 8. Kb4 Kf7 9. Kxa4 Kf6
Analyse>exit
local: t=1:37.94 nps=1077988.3 n=105579256 (34.0% / 66.0%)
total: t=5:29.95 nps=969339.2 n=319837338
stats: fh=91.4%/3.18%/1.111% draws=102327
trans: probes=35782363 hits=11723160 (32.76%) draft=8884074 (24.83%)
tcuts: exact=556 (0.00%) upper=6347909 (17.74%) lower=1445743 (4.04%)
tstor: exact=563 (0.00%) upper=13109554 (68.31%) lower=6080620 (31.69%)
ext: check=12834844 recap=338443 ppush=484641 1rep=391503 thrt=0
q-moves: gen=20329923 tested=15733925 made/un=8911754 max-dep=7
max eval diff: part-1=5.767 part-2=1.197
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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