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Subject: Re: nice queen sac

Author: Tom Likens

Date: 21:19:47 03/11/04

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On March 11, 2004 at 23:21:17, Jon Dart wrote:

>From a game Chepla-Arasan, on ICC:
>
>[D] 3q1r1k/1P1n2p1/4R2p/2QBp2P/3pPb2/R1p2P2/5P2/5K2 w - -
>
>Qxf8+!
>
>It is decisively winning: the next move, Arasan did not
>predict this, but after the move showed a score of about -24,
>and resigned.
>
>Arasan 7.4 takes 39 seconds to find this move on an Athlon
>XP 2500+.
>
>--Jon

Hey Jon,

To choice the legion ranks of people who cut-and-paste program output :-)
The latest version of Djinn like it fairly quickly (on the AMD FX-51).
Note, the time show for each iteration is the time for that ply *not*
the cumlative time (still the total time here is less than 20 seconds).

BTW, I still use Arasan 6.3 as one of my benchmark programs when
trying to measure progress on the engine.

   2  00:00:00   0.15  1. Qc4 Bc1
   3  00:00:00   0.43  1. Qc6 Bc1 2. Ra1
   4  00:00:00   0.53  1. Qc6 Bc1 2. Ra8 Nb8
   5  00:00:00   0.58  1. Qc6 Bd2 2. Rg6 Bc1 3. Ra1
   6  00:00:00   0.82  1. Qc4 Nb6 2. Qc6 Nxd5 3. Ra8 Ne3+ 4. fxe3
   7  00:00:00   -.--  1. Qc6 Bc1 2. Ra8 Nb8 3. Qc8
   7  00:00:00   0.57  1. Qc6 Bc1 2. Ra8 Nb8H 3. Qc8 <HT>
   8  00:00:06   +.++  1. Qxf8+!!
   8  00:00:00   4.02  1. Qxf8+ Qxf8 2. Ra8 Nb8 3. Rc6 Kh7 4. Rxb8 Qxb8
                       5. Rc8 Qa7 6. b8=QH Qxb8H 7. Rxb8H Bg5 <HT>
   9  00:00:00   4.02  1. Qxf8+ Qxf8 2. Ra8 Nb8 3. Rc6 Kh7 4. Rxb8 Qxb8
                       5. Rc8 Qa7 6. b8=Q Qxb8H 7. Rxb8 <HT>
  10  00:00:00   +.++  1. Qxf8+!!
  10  00:00:04   4.40  1. Qxf8+ Qxf8 2. Ra8 Nb8 3. Rc6 Kh7 4. Rxb8H Qxb8H
                       5. Rc8H Qxb7H 6. Bxb7H c2H 7. Rxc2H d3 <HT>
  11  00:00:02   4.40  1. Qxf8+ Qxf8 2. Ra8 Nb8 3. Rc6 Kh7 4. Rxb8 Qxb8
                       5. Rc8 Qxb7 6. Bxb7 c2 7. Rxc2 d3
  12  00:00:00   +.++  1. Qxf8+!!
  12  00:00:07  11.08  1. Qxf8+ Qxf8 2. Ra8 Nb8 3. Rc6 Kh7 4. Rc8 c2
                       5. Rxf8 c1=R+ 6. Kg2 Rc6 7. Bg8+ Kh8 8. Bf7+
                       Kh7 9. Rfxb8 g6
regards,
--tom



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