Author: Robert Hyatt
Date: 13:04:47 01/26/00
Go up one level in this thread
On January 26, 2000 at 14:50:59, José Antônio Fabiano Mendes wrote:
> Moravec 1941 White to play and win
>[D]7k/6p1/6P1/8/8/p5K1/P7/8 w - -
> Immediately going after the a-pawn only leads to a draw.
this one is trivial to a computer:
time surplus 0.00 time limit 166:39 (166:39)
nss depth time score variation (1)
starting thread 1
starting thread 2
starting thread 3
20 1.79 Mat30 1. Kf4 Kg8 2. Ke5 Kf8 3. Kd6 Ke8 4.
Ke6 Kf8 5. Kd7 Kg8 6. Ke7 Kh8 7. Kd6
Kg8 8. Kc5 Kf8 9. Kb4 Ke7 10. Kxa3
<EGTB>
20-> 1.79 Mat30 1. Kf4 Kg8 2. Ke5 Kf8 3. Kd6 Ke8 4.
Ke6 Kf8 5. Kd7 Kg8 6. Ke7 Kh8 7. Kd6
Kg8 8. Kc5 Kf8 9. Kb4 Ke7 10. Kxa3
<EGTB>
21 1.97 Mat30 1. Kf4 Kg8 2. Ke5 Kf8 3. Kd6 Ke8 4.
Ke6 Kf8 5. Kd7 Kg8 6. Ke7 Kh8 7. Kd6
Kg8 8. Kc5 Kf8 9. Kb4 Ke7 10. Kxa3
<EGTB>
Crafty only considers Kf4 from ply 1. eval=.54. At depth18, about 50 ms, it
finds the mate.
> - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> Sackmann White to play and win
>[D]8/8/2p5/k1p1K3/p1P5/P7/8/8 w - -
> 1.Kf5[the key move,a strategic withdrawal to gain the opposition]
14 0.28 0.00 1. Ke6 Ka6 2. Ke7 Ka7 3. Ke6 Ka6
14 0.32 ++ 1. Kf5!!
14 0.33 2.44 1. Kf5 Ka6 2. Ke6 Ka7 3. Ke7 Ka6 4.
Kd8 Kb6 5. Kc8 Ka6 6. Kc7 Ka7 7. Kxc6
Ka6 8. Kxc5
(3) 14-> 0.33 2.44 1. Kf5 Ka6 2. Ke6 Ka7 3. Ke7 Ka6 4.
Kd8 Kb6 5. Kc8 Ka6 6. Kc7 Ka7 7. Kxc6
Ka6 8. Kxc5
15 0.35 ++ 1. Kf5!!
15-> 0.35 2.83 1. Kf5 Ka6 2. Ke6 Ka7 3. Ke7 Ka6 4.
Kd8 Kb6 5. Kc8 Ka6 6. Kc7 Ka7 7. Kxc6
Ka6 8. Kxc5
16 0.36 ++ 1. Kf5!!
16-> 0.49 3.22 1. Kf5 Ka6 2. Ke6 Ka7 3. Ke7 Ka6 4.
Kd8 Kb6 5. Kc8 Ka6 6. Kc7 Ka7 7. Kxc6
Ka6 8. Kxc5
17 0.49 ++ 1. Kf5!!
17-> 0.76 3.61 1. Kf5 Ka6 2. Ke6 Ka7 3. Ke7 Ka6 4.
Kd8 Kb6 5. Kc8 Ka6 6. Kc7 Ka7 7. Kxc6
Ka6 8. Kxc5
18 0.76 ++ 1. Kf5!!
18 0.86 Mat27 1. Kf5 Kb6 2. Kf6 Kb7 3. Kf7 Kb6 4.
Ke8 Ka7 5. Ke7 Kb6 6. Kd6 Kb7 7. Kd7
Kb6 8. Kc8 <HT>
18-> 0.87 Mat27 1. Kf5 Kb6 2. Kf6 Kb7 3. Kf7 Kb6 4.
Ke8 Ka7 5. Ke7 Kb6 6. Kd6 Kb7 7. Kd7
Kb6 8. Kc8 <HT>
> I wonder how computers would fare on these positions. JAFM
Pretty well, it seems. :)
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