Test position (acccidentally split)

[dropster]

Yes, but the trick is to evaluate the position after Bxg7

What do you say here ?

[Terry McCracken]

Yes, but the trick is to evaluate the position after Bxg7

What do you say here ?

It's drawish

[Eelco de Groot]

Yes, but the trick is to evaluate the position after Bxg7

What do you say here ?

It's drawish

Toga analyzing, can't post much of it because the CPU is 99% busy with the chess program playing against itself, Black still has a small edge at move 22, Black has just exchanged Queens on a4, maybe it should not have done that, because the Bishop can't support the b-pawn on its eventual promotion square?

[d]8/4bk2/r3p3/5p2/Qp5p/3P1PP1/5K1P/2B1R3 b - -


8/4bk2/r3p3/5p2/Qp5p/3P1PP1/5K1P/2B1R3 b - -

Engine: Toga II MP Blueberry Winfinder 01 (256 MB)
by Fabien Letouzey, Thomas Gaksch, Zach Wegner

19/45 1:05 +1.39 23...Rxa4 24.Bb2 Ra2 25.Re2 b3
26.Ke3 e5 27.d4 exd4+ 28.Kd3 hxg3
29.hxg3 Bf6 30.Rh2 Ra4 31.Re2 Bg7
32.g4 fxg4 33.fxg4 Bf6 34.g5 Bg7
35.Bc1 Ra2 36.Bb2 (16.084.141.483) 247442

20/45 3:15 +1.30 23...Rxa4 24.Bb2 Ra2 25.Re2 b3
26.Ke3 e5 27.d4 exd4+ 28.Kd3 hxg3
29.hxg3 Bf6 30.Rh2 Ra4 31.Re2 Bh8
32.g4 fxg4 33.fxg4 Ra2 34.Rh2 Be5
35.Rh7+ Kg6 36.Rh5 Rxb2 (16.217.214.299) 83162

[YL84]

Hi,
my engine also think that black has an edge, but it is far from Grandmaster level
"depth 11 score 70 temps 29505 nbnod 4726082 B_F :3,91632082708557 : d7c6 f3c6 b7c6 d2d4 e7d6 h2h4 d8b6 b2c1 b6b5 c1d2 b5h5"

score 70=0.7 pawn

Yves

[Eelco de Groot]

quoting some vanished posts:

>Terry McCracken wrote:
>>dropster wrote:
>>Yes, but the trick is to evaluate the position after Bxg7

>>What do you say here ?


>It's drawish


Toga analyzing, can't post much of it because the CPU is 99% busy with the chess program playing against itself, Black still has a small edge at move 22, Black has just exchanged Queens on a4, maybe it should not have done that, because the Bishop can't support the b-pawn on its eventual promotion square?

[d]8/4bk2/r3p3/5p2/Qp5p/3P1PP1/5K1P/2B1R3 b - -


8/4bk2/r3p3/5p2/Qp5p/3P1PP1/5K1P/2B1R3 b - -

Engine: Toga II MP Blueberry Winfinder 01 (256 MB)
by Fabien Letouzey, Thomas Gaksch, Zach Wegner

19/45 1:05 +1.39 23...Rxa4 24.Bb2 Ra2 25.Re2 b3
26.Ke3 e5 27.d4 exd4+ 28.Kd3 hxg3
29.hxg3 Bf6 30.Rh2 Ra4 31.Re2 Bg7
32.g4 fxg4 33.fxg4 Bf6 34.g5 Bg7
35.Bc1 Ra2 36.Bb2 (16.084.141.483) 247442

20/45 3:15 +1.30 23...Rxa4 24.Bb2 Ra2 25.Re2 b3
26.Ke3 e5 27.d4 exd4+ 28.Kd3 hxg3
29.hxg3 Bf6 30.Rh2 Ra4 31.Re2 Bh8
32.g4 fxg4 33.fxg4 Ra2 34.Rh2 Be5
35.Rh7+ Kg6 36.Rh5 Rxb2 (16.217.214.299) 83162

Black seemed to gain back 0.1 pawn advantage to +1.4

[d]8/4bk2/4p3/5p2/7p/1p1P1PP1/rB2RK1P/8 w - -


8/4bk2/4p3/5p2/7p/1p1P1PP1/rB2RK1P/8 w - -

Engine: Toga II MP Blueberry Winfinder (256 MB, Athlon 2009 MHz)
by Fabien Letouzey, Thomas Gaksch, Zach Wegner


21/49 0:30 -1.47 26.Ke1 e5 27.Kd1 h3 28.Kc1 Bc5
29.Kb1 Bd4 30.Rd2 Kg6 31.Re2 Kh5
32.Rd2 f4 33.g4+ Kg6 34.Re2 Kf6
35.Kc1 Kg5 36.Kb1 Kg6 37.Kc1 (17.347.172.765) 578213

22/49 1:35 -1.43 26.Ke1 e5 27.Kd1 h3 28.Kc1 Bc5
29.Kb1 Bd4 30.Rd2 Kg6 31.Re2 Kh5
32.Rd2 f4 33.g4+ Kg6 34.Re2 Kf6
35.Kc1 Kg5 36.Kb1 Kg6 37.Kc1 Be3+
38.Kb1 (17.412.864.529) 183165

However the rest of the game led to a very drawish position when White after 6 minutes came up with the better 26. Ke3;

22/50 6:08 -1.07++ 26.Ke3 e5 27.d4 e4 28.fxe4 hxg3 29.hxg3 fxe4 30.Rf2+ Kg6 31.Re2 Bg5+ 32.Kxe4 Bc1 33.Kd3 Bxb2 34.Re6+ Kf7 35.Rb6 Bc1 36.Rxb3 Rd2+ 37.Kc4 Kf6 38.d5 Rb2 39.Rxb2 (17.699.688.144) 48086

I did not let the engine play on much further, this was the game, no evals given here but I could retrieve some of that if necessary:


[Event "Shoot-out"]
[Site "Groningen"]
[Date "2007.11.15"]
[Round "?"]
[White "Toga MP Blueberry"]
[Black "Toga MP Blueberry"]
[Result "½-½"]
[SetUp "1"]
[FEN "3q1rk1/1p1bbppp/4p3/8/8/2P2B2/1B1P1PPP/Q3K2R b K -"]

1... Bb5 2. c4 Bxc4 3. Bxg7 Re8 4. Qc3 b5 5. Be5 f6 6. Bg3
Qd7 7. Be2 Qd5 8. f3 Bxe2 9. Kxe2 Rd8 10. Rb1 b4 11. Qc2 f5
12. Bf4 Kf7 13. Qb3 Qb5+ 14. d3 Rc8 15. g3 h5 16. Bd2 h4
17. Re1 Rc6 18. Kf1 Ra6 19. Kf2 Qb6+ 20. Be3 Qd6 21. Bf4
Qd7 22. Bc1 Qa4 23. Qxa4 Rxa4 24. Bb2 Ra2 25. Re2 b3
26. Ke3 hxg3 27. hxg3 Bg5+ 28. f4 Bd8 29. d4 *

[d]3b4/5k2/4p3/5p2/3P1P2/1p2K1P1/rB2R3/8 b - -

declared a draw!

[dropster]

Thanks for the analysis - I think it may be a draw, but white will have to work for it. I like the move Bb5 much better than Nc6 becuase of the passed pawn - maybe computers will not sweat when playing this, but my opponent did, and eventually lost because of the pawn.

Thanks again.

[Terry McCracken]

Thanks for the analysis - I think it may be a draw, but white will have to work for it. I like the move Bb5 much better than Nc6 becuase of the passed pawn - maybe computers will not sweat when playing this, but my opponent did, and eventually lost because of the pawn.

Thanks again.

I agree Ken, and against most humans Bb5! will probably win expect against top players, (who wouldn't likely allow this position), and top programs.

Terry