Author: Robert Hyatt
Date: 20:52:07 06/05/00
Go up one level in this thread
On June 05, 2000 at 20:46:11, Bruce Moreland wrote:
>On June 05, 2000 at 08:22:44, Steffen Jakob wrote:
>
>>Hi!
>>
>>This is a position from an interesting standard game MissSilicon - Hossa, played
>>today at ICC:
>>
>>[D]5k2/7K/6P1/1p3p2/1P5P/1Pb5/8/8 w
>
>This is more interesting:
>
>[D]5k2/7K/6P1/1p3p2/1P5P/2b5/8/8 w
>
>The reason it's more interesting is that you don't get false evals due to white
>being up two pawns to one early on, and later three pawns to one.
>
>This isn't a pawn race problem. After 1. h5 it should be easy to see that 2. h6
>is a terrible threat that costs a bishop.
>
>Once you get to that point, white gets the black f-pawn and we are left with a
>position a pawn up.
>
>It could be possible to mis-evaluate this as a win for white, due to the fact
>that white is a pawn up. The only obvious thing preventing this mis-evaluation
>is the fact that it really is a win for white.
>
I agree that one is easier. no oddball fail lows or highs.. just a steadily
increasing evaluation....
10 1.02 5.88 1. h5 Bxb4 2. g7+ Ke7 3. h6 f4 4. g8=Q
Bd6 5. Kg6 <HT>
10-> 1.03 5.88 1. h5 Bxb4 2. g7+ Ke7 3. h6 f4 4. g8=Q
Bd6 5. Kg6 <HT>
11 1.43 5.88 1. h5 Ke7 2. h6 Bxb4 3. g7 Bd2 4. Kg6
Kd6 5. g8=Q Bxh6 6. Qd8+ Ke5 7. Kxh6
<HT>
11-> 1.44 5.88 1. h5 Ke7 2. h6 Bxb4 3. g7 Bd2 4. Kg6
Kd6 5. g8=Q Bxh6 6. Qd8+ Ke5 7. Kxh6
<HT>
12 1.70 ++ 1. h5!!
12-> 3.02 6.27 1. h5 Ke7 2. h6 Bxb4 3. g7 Bd2 4. Kg6
Kd6 5. g8=Q Bxh6 6. Qd8+ Ke5 7. Kxh6
f4 <HT>
13 3.27 ++ 1. h5!!
13 5.18 7.07 1. h5 Ke7 2. h6 Bxb4 3. g7 Bc3 4. g8=Q
b4 5. Qg5+ Ke6 6. Kg6 Kd5 7. Qxf5+
Kc4 8. Qe4+ Kc5 9. Qd3 <HT>
13-> 5.26 7.07 1. h5 Ke7 2. h6 Bxb4 3. g7 Bc3 4. g8=Q
b4 5. Qg5+ Ke6 6. Kg6 Kd5 7. Qxf5+
Kc4 8. Qe4+ Kc5 9. Qd3 <HT>
14 6.69 7.25 1. h5 Ke7 2. h6 Bxb4 3. g7 Bc3 4. Kg6
b4 5. h7 Kd7 6. h8=Q b3 7. Qb8 Bxg7
8. Kxg7 f4 9. Qxb3
14-> 6.76 7.25 1. h5 Ke7 2. h6 Bxb4 3. g7 Bc3 4. Kg6
b4 5. h7 Kd7 6. h8=Q b3 7. Qb8 Bxg7
8. Kxg7 f4 9. Qxb3
15 8.96 7.44 1. h5 Ke7 2. h6 Bxb4 3. g7 Bc3 4. Kg6
b4 5. h7 Kd7 6. h8=Q b3 7. Qh7 Bxg7
8. Qxg7+ Ke6 9. Qf7+ Ke5 10. Qxb3 <HT>
15-> 9.15 7.44 1. h5 Ke7 2. h6 Bxb4 3. g7 Bc3 4. Kg6
b4 5. h7 Kd7 6. h8=Q b3 7. Qh7 Bxg7
8. Qxg7+ Ke6 9. Qf7+ Ke5 10. Qxb3 <HT>
16 13.36 ++ 1. h5!!
>Here is a much harder position, especially without tables or a little tricky
>pawn knowledge:
>
>[D]5k2/7K/6P1/p4p2/P6P/2b5/8/8 w -
>
>Let your program chew on that for a bit. You can achieve a similar position
>here, but the difference is that the q-side situation does not allow for a win
>once the g-pawn is sacrificed.
I get 0.00 instantly if I have tables turned on. without them, I am going to
need a lot of time. I will have to see that white's king gets stuck in front
of the a-pawn and can't get out without letting black's king sneak in and hold
the draw...
>
>My program has been chewing on this for a while on a slow machine and still
>thinks it is a win for white.
>
>I've seen several people hail various programs as brilliant in the original
>position, but I suggest that a combination of smart and coincidentally lucky
>doesn't add up to real brilliance.
Not at all. :)
>
>bruce
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.