Author: Robert Hyatt
Date: 07:48:39 09/09/04
Go up one level in this thread
On September 09, 2004 at 01:35:57, Albert Silver wrote:
>
>>
>>
>>Searching with 6 piece endgame tables, it seems that Kf5 draws also:
>>
>> 19-> 1:00 -0.01 1. ... Kf5 2. Kxa4 Ke4 3. Bd2 d4 4.
>> Kb4 c3 5. Bxc3 dxc3 6. Kxc3 <EGTB>
>>
>>Maybe the error came a move or few later???
>
>Ok, I think I found the problem move. After 1. ... Kf5 2. Kxa4 Ke4 3.Kb4
>
>8/7b/7P/3p4/1Kp1k3/P1B5/8/8 b - - 0 71
>
>it played 3...Kd3. As far as I can tell, this loses as does 3...Kf5. The only
>drawing move I see here is 3...d4. Could you confirm this is the only drawing
>move at this point or whether I missed another defense? If so, I think it is a
>complete knowledge issue, or EGTB. I don't have them installed so cannot say.
>
> Albert
Kd3 doesn't look good, although it is not an instant loss (mate in N). However,
the score for white goes up iteration by iteration:
17-> 23.87 0.71 1. ... Kd3 2. Bf6 d4 3. a4 c3 4. a5
c2 5. Bg5 Ke4 6. a6 Kf5 7. Bc1 Kf6
8. Bb2 Kf7 9. a7 Be4 10. h7 Kg7
18 36.03 0.70 1. ... Kd3 2. Bf6 d4 3. a4 c3 4. a5
c2 5. Bg5 Ke4 6. a6 Kf5 7. Bc1 Kf6
8. Kc5 d3 9. a7 Be4 10. h7 Kg7 11.
Kd4 <HT>
18-> 36.03 0.70 1. ... Kd3 2. Bf6 d4 3. a4 c3 4. a5
c2 5. Bg5 Ke4 6. a6 Kf5 7. Bc1 Kf6
8. Kc5 d3 9. a7 Be4 10. h7 Kg7 11.
Kd4 <HT>
19 1:07 +1 1. ... Kd3
19 1:31 1.42 1. ... Kd3 2. Bf6 d4 3. a4 c3 4. a5
c2 5. Bg5 Ke4 6. a6 Kf5 7. Bd2 Kf6
8. Kc5 d3 9. a7 Be4 10. Kd4 c1=Q 11.
Bxc1 Kf5
19-> 1:31 1.42 1. ... Kd3 2. Bf6 d4 3. a4 c3 4. a5
c2 5. Bg5 Ke4 6. a6 Kf5 7. Bd2 Kf6
8. Kc5 d3 9. a7 Be4 10. Kd4 c1=Q 11.
Bxc1 Kf5
Kf5 might put up more resistance (not lose as quickly) but it looks bad as well.
d4 leads to a draw... And crafty says draw with or without tables, so they are
not necessary to see the draw. Perhaps some forward pruning bug leads to this,
or a misevaluation??
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