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Subject: Re: Funny game

Author: Uri Blass

Date: 06:48:16 12/10/02

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On December 10, 2002 at 07:34:37, Richard Pijl wrote:

>On December 10, 2002 at 05:32:55, David Rasmussen wrote:
>
>>This was a game played between Chezzz and ArasanX on ICC:
>>
>>[Event "ICS Rated Standard match"]
>>[Site "chessclub.com"]
>>[Date "2002.12.10"]
>>[Round "-"]
>>[White "Chezzz"]
>>[Black "ArasanX"]
>>[Result "*"]
>>[WhiteElo "2492"]
>>[BlackElo "2464"]
>>[TimeControl "900"]
>>
>>1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. Nc3 O-O 5. e4 d6 6. Be3 Nbd7 7. Nd2 c5 8.
>>dxc5 Nxc5 9. Be2 Ne8 10. Qc2 f5 11. Bxc5 dxc5 12. O-O Nd6 13. Bd3 Bd4 14.
>>Rae1 e5 15. Nf3 fxe4 16. Bxe4 Nxe4 17. Qxe4 Rf4 18. Qd5+ Qxd5 19. cxd5 b6
>>20. Re3 Bxe3 21. fxe3 Rf5 22. Rf2 Kg7 23. e4 Rh5 24. h3 Ba6 25. g4 Rxh3 26.
>>Nxe5 Rg3+ 27. Kh2 Re3 28. Rf7+ Kg8 29. Kg2 Re1 30. d6 Bc4 31. Re7 Ba6 32.
>>d7 Rf1 33. Nd5 Bb5 34. a4 Rd8
>>*
>>
>>ArasanX resigned here, I don't know why it doesn't say that in the pgn tags.
>>
>>Anyway, I think the programs disagreed wildly about the merit of whites 20. Re3.
>>As I am infinitely weaker than Chezzz, I didn't know what to think, but it
>>looked speculative to me, and Chezzz is not a very speculative program, it
>>doesn't have any speculatively large evaluations for any positional terms, that
>>aren't decisive. So what do other engines think here, and what do they think
>>about the move 20. Re3?
>>
>>[D]r1b3k1/p6p/1p4p1/2pPp3/3b1r2/2N2N2/PP3PPP/4RRK1 w - - 0 20
>
>The white position has a few problems:
>- The pawn on d5 cannot be defended by an additional piece
>- The bishop on d4 outside the pawn chain limits the white piece mobility
>- The rook on f1 is closed in
>
>By playing Re3 white solves all of these problems and gets a supported passer
>for it.
>The Baron 0.99.4b1 will not play Re3, but plays Ne2 instead. Which solves whites
>problems as well.
>
>The Baron (mobile pentium II-500):
>
> ply       time     nodes  score  pv
>  5( 7)&      0     21510     -6  c3e2 f4f7 e2c3 d4c3 b2c3
>  5( 7).      0     29876     -6  c3e2 f4f7 e2c3 d4c3 b2c3
>  6( 8)&      0     43792      3  c3e2 f4f8 e2d4 e5d4 e1e7 c8a6
>  6( 9).      0     63205      3  c3e2 f4f8 e2d4 e5d4 e1e7 c8a6
>  7(10)&      0     95676    -24  c3e2 f4f5 e2g3 f5f3 g2f3 c8h3 b2b3
>  7(11)&      1    125428     16  f3e5 c8a6 g2g3 f4f6 e5g4 f6d6 g4h6
>  7(11).      1    155100     16  f3e5 c8a6 g2g3 f4f6 e5g4 f6d6 g4h6
>  8(13)&      2    291640      9  c3e2 f4f8 e2d4 e5d4 e1e7 f8d8 f3g5 c8f5
>  8(13).      2    336154      9  c3e2 f4f8 e2d4 e5d4 e1e7 f8d8 f3g5 c8f5
>  9(14)&      4    598883     -2  c3e2 f4f8 e2d4 e5d4 e1e7 f8d8 f1e1 d8d5 f3e5
>  9(14).      9   1129316     -2  c3e2 f4f8 e2d4 e5d4 e1e7 f8d8 f1e1 d8d5 f3e5
> 10(15)&     12   1488254    -14  c3e2 f4f8 e2d4 e5d4 e1e7 f8d8 f1e1 d8d5 e7e8
>g8g7 e1e7
> 10(16).     21   2572771    -14  c3e2 f4f8 e2d4 e5d4 e1e7 f8d8 f1e1 d8d5 e7e8
>g8g7 e1e7
> 11(17)&     31   3654261    -10  c3e2 f4f5 e2d4 e5d4 e1e8 f5f8 e8f8 g8f8 f1e1
>c8f5 d5d6 a8d8 e1e7
> 11(17).     65   7482982    -10  c3e2 f4f5 e2d4 e5d4 e1e8 f5f8 e8f8 g8f8 f1e1
>c8f5 d5d6 a8d8
> 12(18)&    102  11457628     -9  c3e2 f4f3 g2f3 c8h3 e2d4 e5d4 e1e7 h3f1 g1f1
>a8d8
> 12(18).    191  20535912     -9  c3e2 f4f3 g2f3 c8h3 e2d4 e5d4 e1e7 h3f1 g1f1
>a8d8
> 13(19)&    258  28045831     -7  c3e2 f4f3 g2f3 c8h3 e2d4 e5d4 e1e7 h3f1 g1f1
>a8d8 e7a7
>
>After Re3:
>
> ply       time     nodes  score  pv
>  5( 7)&      0     11661    174  c8a6 e3e1 a6f1 g1f1 g8g7
>  5( 8).      0     14965    174  c8a6 e3e1 a6f1 g1f1 g8g7
>  6( 8)&      0     30253    147  c8a6 f1e1 d4e3 e1e3 f4b4 d5d6
>  6(11).      0     54223    147  c8a6 f1e1 d4e3 e1e3 f4b4 d5d6
>  7(10)&      0     73080    120  c8a6 f1e1 d4e3 e1e3 a8d8 e3e5 g8g7
>  7(12).      1    149263    120  c8a6 f1e1 d4e3 e1e3 a8d8 e3e5 g8g7
>  8(12)&      1    207365    113  c8a6 f1e1 d4e3 e1e3 a8e8 e3e5 e8e5 f3e5
>  8(13).      3    374199    113  c8a6 f1e1 d4e3 e1e3 a8e8 e3e5 e8e5 f3e5
>  9(14)&      4    511985    113  c8a6 f1e1 d4e3 e1e3 g8g7 f3e5 f4b4 b2b3 a8e8
>  9(14)&      5    617043    128  d4e3 f2e3 f4f5 g2g4 f5f7 f3e5 f7e7 e5c6 e7e3
>  9(15).      7    893522    128  d4e3 f2e3 f4f5 g2g4 f5f7 f3e5 f7e7 e5c6 e7e3
> 10(15)&     10   1264700    102  d4e3 f2e3 f4f8 f1e1 f8f5 e3e4 f5h5 g1f2 c8d7
>a2a3
> 10(17).     46   5100976    102  d4e3 f2e3 f4f8 f1e1 f8f5 e3e4 f5h5 g1f2 c8d7
>a2a3
> 11(17)&     60   6680873    126  d4e3 f2e3 f4f5 f1f2 g8g7 c3e4 c8b7
> 11(18).     89   9788608    126  d4e3 f2e3 f4f5 f1f2 g8g7 c3e4 c8b7
> 12(18)&    112  12379096    121  d4e3 f2e3 f4f5 e3e4 f5h5 h2h3 c8a6 f1d1 a8d8
>g1f2 g8f7
> 12(19).    177  19368010    121  d4e3 f2e3 f4f5 e3e4 f5h5 h2h3 c8a6 f1d1 a8d8
>g1f2 g8f7
> 13(20)&    232  25685025    131  d4e3 f2e3 f4f5 f1f2 g8g7 d5d6 f5h5 c3e4 c8g4
>e4g3 g4f3 g2f3 h5h4
> 13(21).    375  40929285    131  d4e3 f2e3 f4f5 f1f2 g8g7 d5d6 f5h5 c3e4 c8g4
>e4g3 g4f3 g2f3 h5h4
>
>I'll try this position when I get home with other (newer) Baron versions. If the
>results differ much I'll post them again.
>
>Imo Arasan could have done better with 25..Raf8 instead of Rg3+. The mistake
>that gave the win to Chezzz was 29..Re1 instead of 29..Raf8 (again)
>
>Richard

or 29...Rd3

Movei(p850) likes also Rf8 but changes it's mind later to 29...Rd3

depth=12 +1.08 e3d3 f7f2 d3d4 e5c6 a8e8 a2a3 g8g7 c6d4 c5d4 c3e2 e8e4 e2f4
Nodes: 36916330 NPS: 185053
Time: 00:03:19.49
depth=13 +1.10 e3d3 f7f2 d3d4 e5c6 a8e8 g2h2 g8g7 c6d4 c5d4 c3d1 e8e4 h2g3 a6e2
Nodes: 58499483 NPS: 182753
Time: 00:05:20.10

Uri



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