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Subject: Re: Interesting position

Author: Rob Shultz

Date: 12:12:08 04/01/99

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On March 31, 1999 at 16:56:35, Phil Dixon wrote:

>On March 31, 1999 at 15:50:11, Rob Shultz wrote:
>
>>On March 31, 1999 at 14:02:35, Jon Dart wrote:
>>
>>>Here is an interesting position from a game my program
>>>played on FICS recently:
>>>
>>>r1r2k2/1p4pQ/1n1bp2p/p2n1p2/P2P2Nq/1B5P/1P3PP1/R1BR2K1 w - f6
>>>
>>>White (the human player) played Re1, leaving the Knight hanging,
>>>and won, after fxg4 Rxe6 Rxc1+ Rxc1 Qg5 Rce1 gxh3 Re8+ Kf7.
>>>Very impressive, especially in a blitz game! However, my program
>>>did not find the best defense : fxg4 Rxe6 gxh3, etc.
>>>
>>>Crafty 16.5 likes Re1, but it takes a long time to see it, and
>>>even then, with the amount of time I gave it, assigned it only
>>>a small plus score. I'm not sure it's enough better than the
>>>alternatives to be a "best move". Here is the output:
>>>
>>>               11     2:49  -0.37   1. Ne3 Qh5 2. Nxd5 Nxd5 3. Bd2 Kf7
>>>                                    4. Bxd5 exd5 5. Bxh6 Bf8 6. b4 Qxh6
>>>                                    7. Qxf5+ Qf6 8. Qxd5+
>>>               11     5:37     ++   1. Re1!!
>>>               11     6:20   0.10   1. Re1 fxg4 2. Rxe6 gxh3 3. Qf5+ Nf6
>>>                                    4. Rxd6 h2+ 5. Kh1 Nc4 6. Rd7 b6 7.
>>>                                    d5
>>>               11->   7:39   0.10   1. Re1 fxg4 2. Rxe6 gxh3 3. Qf5+ Nf6
>>>                                    4. Rxd6 h2+ 5. Kh1 Nc4 6. Rd7 b6 7.
>>>                                    d5
>>>               12    11:31   0.08   1. Re1 fxg4 2. Rxe6 gxh3 3. Qf5+ Nf6
>>>                                    4. Rxd6 h2+ 5. Kh1 Nc4 6. Rd7 b6 7.
>>>                                    d5 Qg4
>>>               12->  15:35   0.08   1. Re1 fxg4 2. Rxe6 gxh3 3. Qf5+ Nf6
>>>                                    4. Rxd6 h2+ 5. Kh1 Nc4 6. Rd7 b6 7.
>>>                                    d5 Qg4
>>>               13    26:30   0.06   1. Re1 fxg4 2. Rxe6 gxh3 3. Qf5+ Nf6
>>>                                    4. Rxd6 Nc4 5. Rd7 h2+ 6. Kh1 <HT>
>>>              time=33:20  cpu=99%  mat=0  n=344343893  fh=94%  nps=172105
>>>              ext-> checks=20911812 recaps=1000315 pawns=174053 1rep=1446615
>>>              predicted=0  nodes=344343893  evals=34920023
>>>              endgame tablebase-> probes done=0  successful=0  plimit=17
>>>              hashing-> trans/ref=19%  pawn=4%  used=99%
>>>
>>>Here is the whole game:
>>>
>>>[Event "?"]
>>>[Site "FICS"]
>>>[Date "1999.03.30"]
>>>[Round "?"]
>>>[White "bielg"]
>>>[Black "Arasan 5.1"]
>>>[Result "1-0"]
>>>[ECO "D18"]
>>>[WhiteELO "2227"]
>>>[BlackELO "2270"]
>>>[TimeControl "120+12"]
>>>
>>>1. Nf3 d5 2. d4 c6 3. c4 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4
>>>Bb4 8. O-O Nbd7 9. h3 O-O 10. Qb3 c5 11. Nh4 Bxc3 12. Nxf5 Bb4
>>>13. Ng3 Nb6 14. Bd3 a5 15. Rd1 cxd4 16. exd4 Nfd5 17. Ne4 Qh4 18. Ng5
>>>h6 19. Bh7+ Kh8 20. Nf3 Qf6 21. Bc2 Kg8 22. Qd3 Rfc8 23. Qh7+ Kf8
>>>24. Ne5 Bd6 25. Ng4 Qh4 26. Bb3 f5 27. Re1 fxg4 28. Rxe6 Rxc1+
>>>29. Rxc1 Qg5 30. Rce1 gxh3 31. Re8+ Kf7 1-0
>>
>>Here is what Fritz 5.32 thought about the position:
>>New position
>>r1r2k2/1p4pQ/1n1bp2p/p2n1p2/P2P2Nq/1B5P/1P3PP1/R1BR2K1 w - - 0 1
>>
>>Analysis by Fritz 5.32:
>>
>>1.Bxd5 Nxd5 2.Qh8+ Kf7
>>  ³  (-0.53)   depth: 1/6   00:00:00
>>1.Ne5
>>  =  (0.00)   depth: 1/8   00:00:00
>>1.Ne5 Bxe5 2.dxe5
>>  ²  (0.28)   depth: 2/7   00:00:00
>>1.Ne5 Bxe5 2.dxe5 Nc4 3.Qh8+ Kf7
>>  ²  (0.38)   depth: 3/11   00:00:00  2kN
>>1.Ne5 Qf6 2.Re1 Bxe5 3.Rxe5
>>  ²  (0.31)   depth: 4/19   00:00:00  6kN
>>1.Ne5 Bxe5 2.dxe5 Nc4 3.Bxc4 Qxc4 4.Qh8+ Kf7
>>  ²  (0.38)   depth: 5/23   00:00:00  31kN
>>1.Ne5 Bxe5 2.dxe5 Qe4 3.Bd2 Qxe5 4.Qh8+ Kf7
>>  =  (0.00)   depth: 6/23   00:00:00  89kN
>>1.Ne3
>>  =  (-0.12)   depth: 6/26   00:00:00  170kN
>>1.Ne3 Qf6 2.Nxd5 Nxd5 3.Re1 Qxd4 4.Rxe6
>>  =  (0.09)   depth: 6/26   00:00:00  222kN
>>1.Ne3 Nf4 2.d5 Ne2+ 3.Kh1 Nxc1 4.Raxc1 Rxc1 5.Rxc1 Qxf2
>>  =  (0.00)   depth: 7/29   00:00:02  761kN
>>1.Ne3 Qf6 2.Nxd5 Nxd5 3.Re1 Kf7 4.Bxd5 exd5 5.Bxh6 Qxh6
>>  =  (0.00)   depth: 8/29   00:00:05  1811kN
>>1.Ne3 Qf6 2.Nxd5 Nxd5 3.Bxd5 exd5 4.Rd3 Re8 5.Bd2 Bc7
>>  =  (0.00)   depth: 9/34   00:00:12  4668kN
>>1.Ne3 Qf6 2.Nxd5 Nxd5 3.Bxd5 exd5 4.Rd3 f4 5.Bd2 Kf7
>>  =  (-0.09)   depth: 10/35   00:00:31  12323kN
>>1.Ne3 Qf6 2.Nxd5 Nxd5 3.Bxd5 exd5 4.Rd3 Re8 5.Bd2 Kf7
>>  =  (-0.12)   depth: 11/35   00:01:21  32413kN
>>1.Re1
>>  =  (-0.09)   depth: 11/38   00:03:18  77095kN
>>1.Re1 fxg4 2.Rxe6 gxh3 3.Qf5+ Nf6 4.Rxd6 hxg2 5.Kxg2 Nc4
>>  =  (0.16)   depth: 11/38   00:04:31  108843kN
>>1.Re1 fxg4 2.Rxe6 gxh3 3.Qf5+ Nf6 4.Rxd6 hxg2 5.Kxg2 Nc4
>>  =  (0.00)   depth: 12/42   00:07:14  179001kN
>>1.Re1
>>  ²  (0.31)   depth: 13/44   00:23:56  607207kN
>>1.Re1 fxg4 2.Rxe6 gxh3 3.Qf5+ Nf6 4.Rxd6 hxg2 5.Kxg2 Nc4
>>  =  (0.25)   depth: 14/43   01:07:04  1603840kN
>>
>>
>>Rob
>I haven't looked at this position yet, but how do you get the readout (PV) from
>Fritz 5.32, Rob?  If somebody can explain this to me in SIMPLE terms, maybe I
>can figure it out then.
>
>Phil

I start Fritz and set it for INFINITE ANALYSIS.  Then right click on the readout
(PV) and select "CLIP ANALYSIS".  I switch to the document I want to put the PV
into and hit CONTROL-V (the shortcut for paste).  Hope this helps!

Rob



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