Author: Uri Blass
Date: 00:44:45 09/24/03
Go up one level in this thread
On September 24, 2003 at 03:34:14, Tim Foden wrote:
>On September 24, 2003 at 01:58:35, Johan de Koning wrote:
>
>>On September 23, 2003 at 03:42:18, Tim Foden wrote:
>>
>>>On September 23, 2003 at 03:03:12, Johan de Koning wrote:
>>>
>>>>On September 22, 2003 at 02:32:34, Tim Foden wrote:
>>>>
>>>>>I think these positions might behave like smaller versions of the full thing...
>>>>>
>>>>>[d] 8/1pppppp1/8/8/8/8/1PPPPPP1/8 w - -
>>>>>
>>>>>GLC thinks this is a win... d4 Mate in 15.
>>>>
>>>>Hmmm..., my program (named JJ.EXE :-) proved it a draw.
>>>>Then I added en passent.
>>>>Now it says it's a mate in 14.
>>>>
>>>>098.81 75M346 D21 +4 : d4,d5 f3,b6 e4,dxe4 fxe4,b5 b4,c6 g3,f6 g4,g6 e ...
>>>>184.33 140M189 D23 +212 : d4,d5 f3,g6 e4,dxe4 fxe4,f5 exf5,gxf5 b4,e6 b5, ...
>>>>279.30 212M443 D25 +9973 : d4,d5 f3,b6 e4,dxe4 fxe4,b5 c3,e6 e5,c6 b4,f6 e ...
>>>>377.94 286M689 D27 +9973 : d4,d5 f3,b6 e4,dxe4 fxe4,b5 c3,c6 b3,g6 c4,bxc4 \
>>>> bxc4,f6 c5,e6 d5,exd5 exd5,cxd5
>>>>0000011111 1111222222 22222222:: :::::::::: :::::::::: :::::::::: ::::::::::
>>>>0357912456 7899011222 23222210:: :::::::::: :::::::::: :::::::::: ::::::::::
>>>>
>>>>So by adding e.p. I removed the 1 known bug, but we still don't agree. :-(
>>>>Unfortunately we don't know the number and nature of the unknown bugs. :-)
>>>>
>>>>.. Johan
>>>
>>>Well, we can probably track the bugs down...
>>>
>>>After d4 d5 GLC agrees that f3 is a mate in 13...
>>>
>>>[d]8/1pp1ppp1/8/3p4/3P4/8/1PP1PPP1/8 w
>>>
>>> 22 6.229 +Mate13 6249564 f3 g5 2. e4 e5 3. dxe5 d4 4. b4 c6 5. g3 b6 6. f4
>>> gxf4 7. gxf4 c5 8. f5 d3 9. cxd3 cxb4 10. e6
>>> fxe6 11. fxe6 b3
>>>
>>>GLC prefers g5 after f3 rather than b6.
>>>
>>>But what does yours say after d4 g5?
>>>
>>>[d]8/1ppppp2/8/6p1/3P4/8/1PP1PPP1/8 w
>>>
>>>GLC says:
>>>
>>> 22 22.202 +Mate14 21765k c4 f5 2. g3 f4 3. e4 fxe3 4. fxe3 e6 5. g4 d6 6.
>>> d5 exd5 7. cxd5 c6 8. dxc6 bxc6 9. e4 c5 10. b3
>>> d5 11. exd5 {ht}
>>
>>002.86 3633954 D19 +102 : c4,f5 g3,f4 g4,b6 b4,c6 e3,f3 c5,bxc5 bxc5,d5 ...
>>003.46 4415449 D19 +103 : e4,b5 c3,g4 b3,d6 f4,e5 fxe5,dxe5 d5,g3 c4,b4 ...
>>004.29 5417281 D21 +105 : e4,b5 c3,c6 b3,g4 c4,bxc4 bxc4,d6 d5,cxd5 exd ...
>>005.00 6327052 D21 +9977 : c4,f5 g3,f4 g4,b6 b4,c6 e3,f3 e4,d5 exd5,cxd5 ...
>>005.33 6766094 D23 +9977 : c4,f5 g3,f4 g4,b6 b4,c6 e3,f3 e4,d5 exd5,cxd5 \
>> c5,bxc5 bxc5,e6 c6,e5
>
>This is the position after 6. e4 above.
>
>[d]8/3pp3/1pp5/6p1/1PPPP1P1/5p2/5P2/8 b - - 0 7
>
>Here GLC thinks that 6... d5 is a blunder. It thinks that 6... b5 draws.
>
> 5 0.010 +0.000 515 b5 2. c5 e6 3. e5 d5
This pv is leading to win for white by 4.exd6(en passent capture).
Uri
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