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Subject: Re: The Corbit 16 ply challenge

Author: Uri Blass

Date: 07:15:29 09/26/00

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On September 26, 2000 at 07:02:06, Uri Blass wrote:

>On September 26, 2000 at 06:46:18, Uri Blass wrote:
>
>>On September 26, 2000 at 03:52:12, pete wrote:
>>
>><snipped>
>>>White(1): setboard r1b1r1k1/ppq2p1p/3b1ppQ/2n5/8/3B2N1/PPP2PPP/R1B2RK1 w - -
>>>
>>>16-> 2126:46   9.54   1. Nh5 Bxh2+ 2. Kh1 gxh5 3. Bxh7+ Kh8
>>>                     4. Bg6+ Kg8 5. Qh7+ Kf8 6. Bh6+ Ke7
>>>                     7. Qxf7+ Kd6 8. Qxe8 Qb6 9. Kxh2 Ne6
>>>                     10. Bf5 Kc7 11. Qe7+ Bd7 12. Rad1 Rd8
>>>                     13. Rxd7+ Rxd7 14. Bf4+ Kc8 15. Bxe6
>>>17   2298:46     ++   1. Nh5!!
>>
>>Chessmaster6000(ss=10)
>>
>>evaluation 9.88 at depth 1/10 after 12:14
>>main line is similiar and the first different move is 9.Rfd1+
>>
>>I hope that it can see mate at depth<16 in order to prove again that the depth
>>is not important.
>>
>>Uri
>
>evaluation 10.62 at depth 11
>
>first different move relative to crafty's line 10.Rfe1
>time 57:50
>
>Uri

evaluation 11.50 at depth 2/12
first different move 9.Qe3
time 3:35:06

I am not going to wait to see the evaluation at depth 3/13

The first 7 moves of black are forced(alternatives lead to short mates) so I
think that it may be a better idea to start from the position after 8.Qxe8 if we
want to try to prove a forced mate.

Here black has some alternatives like 8...Bd7 or 8...Qd7 or 8...Qc6 or 8...Qa5
when seeing mate for white is not a simple problem for programs(they cannot see
mate in a short time).

Uri



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