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Subject: Re: Test Position

Author: Uri Blass

Date: 22:58:53 11/16/04

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On November 17, 2004 at 01:24:31, chandler yergin wrote:

>The Eval shows =
>??

??
= does not mean draw.

It seems that you ignore the numbers.

=3.25 means that the side to move is 3.25 pawns up.

>How does White lose?

>>1... Nd5-f4 2. Qe2-f2 Nf4xg2 3. Rd2xd8 Rh8xd8 4. Qf2xg2 b7-b6 5. Ra1-f1 Qg6-g4
>>6. Kh2-g1 Rd8-d3 7. Rf1-f4 Qg4xg3 8. Qg2xg3 Rd3xg3
>> = (3.25)	Depth: 15/35	00:02:07.13	196517kN (1546 KN/s, 2388 splits, 211 aborts)

It is clear that black has a big advantage as movei can also confirm

depth=14 +1.90 d5f4 e2f2 f4g2 d2d8 h8d8 f2g2 b7b6 a1f1 g6d3 g2f2 d3d2 h2g1 d2f2
f1f2 d8d1 f2f1 d1d2 f1f6
Nodes: 443349636 NPS: 531836
Time: 00:13:53.62

Unfortunately movei needs more time than zappa to find Nf4 and it needs 7
minutes for that.

428703 <first :  12 125 41951 222119448 h8f8 e2e1 d5b4 d2d8 f8d8 e1e3 b7b6 a1f1
g6h5 e3f4 g7g8 f4f6 d8e8
447000 <first : 12 126 43782 231624477 d5f4
454469 <first :  12 131 44529 235734228 d5f4 g3f4 d8d2 e2d2 h8h4 h2g1 g6g3 g1f1
g3h2 d2e3 h4f4 f1e1 f4f5 g2e4 f5e5

The score for Nf4 later goes up but zappa is still clearly faster than movei in
getting depth 15.

depth=15 +1.98 d5f4 e2f2 f4g2 d2d8 h8d8 f2g2 d8d3 g2b7 e6d7 b7g2 d7c6 g2f2 d3f3
f2g2 g6f5 h2g1 f5e5
Nodes: 698511717 NPS: 540978
Time: 00:21:31.20

Movei still can only dream about 1546 Knodes per second at this moment.

Uri



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