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Subject: Re: Some computer analysis after 11..g5

Author: Eelco de Groot

Date: 13:43:46 08/18/05

Go up one level in this thread


On August 18, 2005 at 13:08:11, Eelco de Groot wrote:

>On August 18, 2005 at 09:48:19, Peter Berger wrote:
>
>>On August 18, 2005 at 09:01:51, Majd Al-Ansari wrote:
>>
>>>I was watching the game on playchess and looks like Fruit won the game.  Very
>>>impressive game considering Crafty was using 8 processors and Fruit only 1
>>>processor.  But I have to admit I think that Crafty was caught by poor book
>>>opening.
>>
>>I am not sure I completely agree with this assessment, at least not when put
>>this way.
>>
>>The potentially controversial move is 11. ... g5 I suppose. I don't think this
>>move is that bad at all, objectively. Let's move a little further: 12. Qd2 h6
>>13. Qc3 Qf6 14. Kh1 . Here Crafty played 14. ...Bb7?, that is clearly a bad
>>idea. The king has to stay in the centre or castle queenside if necessary, the
>>bishop belongs to d7 or e6 and then the rooks both belong to the kingside to
>>attack white's king.
>>
>>After 14. ...Bb7 white has an edge, but black is not lost. After 15. f4 gxf4 16.
>>Bxf4 the next critical point is reached. Here a possible move is 16...Rg8 e.g. -
>>nothing to brag about, but black is still well alive. Instead 16. ..O-O ?? is
>>just suicide.
>>
>>So yes - this line should never have been in Crafty's book, because it could not
>>deal with it. I am to blame for that, so maybe 0.6 points were lost because of
>>that - bad enough !! The rest is Crafty's fault, that just castled into it.
>>
>>Congrats to Fruit - nice game!
>>
>>Peter
>
>Hello Peter,
>
>One processor against eight, I think it is amazing that Fruit won! You only
>mention this in the thread below, but it seems to me that the losing move may
>have been 12..h6, not 11..g5. Not that Pro Deo 1.1 Vulcan seems not really at
>home in this position, probably a sign that 11..g5 is not such a good opening
>move for computers to play, not even with eight processors? Or maybe this Vulcan
>version that I used is not very well tuned.. Moves and scores keep changing here
>even after longer analysis times. The computer thinks 11..0-0 is beter than
>11..g5, but only by a difference from 0.00 to -0.45 But after 12..h6 the score
>for White is quickly +1.00. Maybe because pawn g7-g5 is more meant as an anti
>f2-f4 maneuver, not to be defended by h7-h6? 12..Rg8 is preferred here. But the
>move f2-f4 that keeps coming up in several lines, maybe is not a move that Fruit
>would have liked to play.
>
> A Pro Deo 1.1 Vulcan version after 12..h6:
>
> [D]r1bqk2r/p1p2p2/1bpp3p/4n1p1/N3P3/7P/PPPQBPP1/R1B2RK1 w kq -
>
> 00:00:00   1.00  0.42  13.Nxb6 axb6
> 00:00:00   2.00  0.48  13.Nxb6 axb6 14.b3
> 00:00:00   3.00  0.38  13.Nxb6 axb6 14.b3 c5 15.Bb5
> 00:00:00   4.00  0.43  13.Nxb6 axb6 14.Qe3 Be6 15.b3
> 00:00:00   4.09  0.44  13.b3 Qf6 14.Bb2 Nxb6 15.Bf5 Nxa8 16.Bxh3
> 00:00:00   5.00  0.50  13.b3 g4 14.Nxb6 axb6 15.Rd1 Qf6
> 00:00:00   6.00  0.48  13.b3 g4 14.Nxb6 axb6 15.Bb2 gxh3 16.hxg2 Kxg2
>                        17.Bd7 Qg5
> 00:00:00   6.29  0.48  13.Qc3 Be6 14.Nxb6 axb6 15.f4 gxf4 16.Bxf4
> 00:00:00   7.00  0.70  13.Qc3 Qe7 14.Nxb6 axb6 15.Be3 Ba6 16.Bxa6
> 00:00:00   8.00  0.70  13.Qc3 Qe7 14.Nxb6 axb6 15.Be3 Ba6 16.Bxa6
> 00:00:00   9.00  0.77  13.Qc3 Qe7 14.Nxb6 axb6 15.f4 gxf4 16.Bxf4
>                        Bd7 17.Bc4 f6
> 00:00:01  10.00  0.85  13.Qc3 Qe7 14.Nxb6 axb6 15.f4 gxf4 16.Bxf4
>                        Bd7 17.Bc4 Rh7 18.Rad1 Nxc4 19.Qxc4
> 00:00:03  11.00  0.85  13.Qc3 Qe7 14.Nxb6 axb6 15.f4 gxf4 16.Bxf4
>                        Bd7 17.Bc4 Rh7 18.Rad1 Nxc4 19.Qxc4
> 00:00:12  12.00  1.00  13.Qc3 Qe7 14.Nxb6 axb6 15.f4 gxf4 16.Bxf4
>                        Bb7 17.a4 Rh7 18.Qe3 Qh4 19.b3
> 00:00:32  13.00  1.00  13.Qc3 Qe7 14.Nxb6 axb6 15.f4 gxf4 16.Bxf4
>                        Bb7 17.a4 Rh7 18.a5 Bc8
> 00:01:45  14.00  1.00  13.Qc3 Qf6 14.Nxb6 axb6 15.f4 gxf4 16.Bxf4
>                        Ra7 17.Bxe5 Qxe5 18.Qxc6 Bd7 19.Qd5 Rh7 20.Qxe5
>                        dxe5 21.Rf6 Ra4
> 00:04:23  15.00  1.03  13.Qc3 Qf6 14.Nxb6 axb6 15.f4 gxf4
> 00:09:33  16.00  1.02  13.Qc3 Qf6 14.Nxb6 axb6 15.f4 gxf4 16.Bxf4
> 00:26:28  17.00  1.00  13.Qc3 Qf6 14.Nxb6 axb6 15.f4

After 12.Qd2

 [D]r1bqk2r/p1p2p1p/1bpp4/4n1p1/N3P3/7P/PPPQBPP1/R1B2RK1 b kq -

 00:00:00   1.00  -1.55  12..O-O 13.Nxb6 axb6 14.Qxg5 Ng6
 00:00:00   1.01  -1.40  12..Bb7 13.Nxb6 axb6 14.Qxg5
 00:00:00   1.07  -0.95  12..Be6 13.Qxg5
 00:00:00   1.19  -0.25  12..g4
 00:00:00   1.20  -0.07  12..h6
 00:00:00   2.00  -0.33  12..h6 13.Nxb6 axb6
 00:00:00   2.01  -0.32  12..Rg8 13.Nxb6 axb6
 00:00:00   3.00  -0.43  12..Rg8 13.Nxb6 axb6 14.Rd1
 00:00:00   3.01  -0.41  12..h6 13.Nxb6 axb6 14.Rd1
 00:00:00   4.00  -0.30  12..h6 13.Nxb6 axb6 14.f4 gxf4 15.Qxf4
 00:00:00   5.00  -0.34  12..h6 13.Nxb6 axb6 14.Rd1 Qf6 15.Bh5
 00:00:00   6.00  -0.34  12..h6 13.Nxb6 axb6 14.f4 gxf4 15.Qxf4 Be6
                         16.Qf6 Qxf6
 00:00:00   6.01  -0.26  12..Rg8 13.Nxb6 axb6 14.Qc3 Be6 15.a4 Qf6
 00:00:00   7.00  -0.38  12..Rg8 13.Nxb6 axb6 14.Qe3 c5 15.Bd2 d5 16.Bc3
 00:00:00   8.00  -0.38  12..Rg8 13.Nxb6 axb6 14.Qc3 Ra4 15.f4 gxf4
                         16.Bxf4 Rxe4 17.Bxe5 Rxe2
 00:00:01   9.00  -0.35  12..Rg8 13.Nxb6 axb6 14.Qe3 g4 15.Qg3 Rg6
                         16.Bf4 gxh3 17.Rad1
 00:00:06  10.00  -0.38  12..Rg8 13.Qc3 Qf6 14.Nxb6 axb6 15.Bd2 Be6
                         16.a4 d5 17.f3 Rd8 18.f4 gxf4
 00:00:13  11.00  -0.36  12..Rg8 13.Nxb6 axb6 14.Qc3 Qf6 15.Bd2 Be6
                         16.f3 d5 17.exd5 Bxd5
 00:00:37  12.00  -0.39  12..Rg8 13.Nxb6 axb6 14.Qc3 Qf6 15.Be3 b5
                         16.f3 Bd7 17.a3 c5 18.Rad1
 00:01:50  13.00  -0.57  12..Rg8 13.Qc3 Bd7 14.Qg3 Qe7
 00:04:40  14.00  -0.44  12..Rg8 13.Qc3 Qf6 14.Nxb6 axb6 15.f4 gxf4
                         16.Bxf4 Bd7 17.g3
 00:10:30  15.00  -0.44  12..Rg8 13.Qc3 g4 14.hxg4 Bxg4
 00:27:01  16.00  -0.45  12..Rg8 13.Nxb6 axb6 14.Qc3 g4 15.hxg4
 01:21:33  17.00  -0.45  12..Rg8 13.Nxb6

After 12.Qd2 Rg8, the eval stays about the same:

 r1bqk1r1/p1p2p1p/1bpp4/4n1p1/N3P3/7P/PPPQBPP1/R1B2RK1 w q -

 00:00:00   1.00  0.38  13.Nxb6 axb6
 00:00:00   2.00  0.48  13.Nxb6 axb6 14.Rd1
 00:00:00   3.00  0.35  13.Nxb6 axb6 14.b3 d5
 00:00:00   4.00  0.41  13.Nxb6 axb6 14.Rd1 Qf6 15.Qd4
 00:00:00   5.00  0.32  13.Nxb6 axb6 14.Qc3 Be6 15.a4 Qf6
 00:00:00   6.00  0.43  13.Nxb6 axb6 14.Qe3 c5 15.Bd2 d5 16.Bc3
 00:00:00   7.00  0.25  13.Nxb6 axb6 14.Qe3 g4 15.Qg3 Ba6 16.Bxa6 Rxa6
 00:00:00   7.03  0.41  13.Qc3 g4 14.Qg3 Rg6 15.Nxb6 axb6 16.h4
 00:00:00   8.00  0.38  13.Qc3 Qf6 14.Nxb6 axb6 15.Bd2 Be6 16.a4 d5
                        17.f4 gxf4
 00:00:01   8.01  0.40  13.Nxb6 axb6 14.Qc3 g4 15.Qg3 Be6 16.f4 Bc4
                        17.Bxc4 Nxc4 18.Rd1 Qe7
 00:00:01   9.00  0.38  13.Nxb6 axb6 14.Qc3 Qf6 15.Bd2 Be6 16.a4 d5
                        17.f4 gxf4 18.Bxf4 Bxe5
 00:00:07  10.00  0.25  13.Nxb6 axb6 14.f3 Qf6 15.Qc3 Qh6 16.Rf2 c5
                        17.f4 gxf4 18.Bxf4 Qe6 19.Bxe5
 00:00:22  11.00  0.45  13.Nxb6 axb6 14.Qc3 Qf6 15.Bd2 Be6 16.b4 g4
                        17.Rac1 Rxa2 18.Be1
 00:00:40  12.00  0.41  13.Nxb6 axb6 14.Qc3 Qf6 15.Be3 c5 16.Bb5 Bd7
                        17.Bxd7 Kxd7 18.f3 Kc8
 00:02:25  13.00  0.51  13.Nxb6 axb6 14.Qc3 Ra4 15.f3 Be6 16.Be3 b5
 00:05:42  14.00  0.36  13.Nxb6 axb6 14.Qc3 g4 15.hxg4 Bxg4 16.Bxg4
                        Rxg4 17.f4 Qh4 18.fxe5
 00:26:07  15.00  0.40  13.Nxb6 axb6 14.f3 Ng6 15.Qc3




>
>After 14.Kh1:
>
> [D]r1b1k2r/p1p2p2/1bpp1q1p/4n1p1/N3P3/2Q4P/PPP1BPP1/R1B2R1K b kq -
>
> 00:00:00   1.00  -0.02  14..O-O
> 00:00:00   1.01  0.00  14..Bb7
> 00:00:00   1.03  1.03  14..Bxf2
> 00:00:00   2.00  0.58  14..Bxf2 15.Be3
> 00:00:00   3.00  -1.54  14..Bxf2 15.Be3 Bxh3 16.gxh3 Bxf2 17.Nd3 Qxf6
> 00:00:00   3.01  -0.55  14..Bb7 15.Nxb6 axb6 16.Be3 Qb3
> 00:00:00   3.03  -0.17  14..Be6 15.Nxb6 axb6 16.b3 h4 17.gxh4 a3
> 00:00:00   3.25  -0.14  14..d5 15.Nxb6 cxb6 16.exd5 cxd5
> 00:00:00   4.00  -0.64  14..d5 15.Nxb6 axb6 16.exd5 c5 17.Bb5
> 00:00:00   4.01  -0.40  14..Be6 15.Nxb6 axb6 16.f4 gxf4 17.Bxf4 Bxe5
>                         18.Qxe5 Qxc6 19.Ke7
> 00:00:00   4.06  -0.14  14..Qg6 15.Nxb6 axb6 16.Qd4 Be6 17.Bxa2
> 00:00:00   5.00  -0.17  14..Qg6 15.Nxb6 axb6 16.Qd4 f5 17.f3
> 00:00:00   6.00  -0.23  14..Qg6 15.b3 Be6 16.Nxb6 axb6 17.Qe3
> 00:00:00   7.00  -0.13  14..Qg6 15.f3 Qh5 16.Nxb6 axb6 17.Kg1 Ba6
>                         18.Bxa6 Rxa6
> 00:00:00   8.00  -0.13  14..Qg6 15.f3 Qh5 16.Nxb6 axb6 17.Kg1 Ba6
>                         18.Bxa6 Rxa6
> 00:00:01   9.00  -0.11  14..Qg6 15.Nxb6 axb6 16.f4 gxf4 17.Bxf4 Ra5
>                         18.Bxe5 dxe5 19.Qd3 O-O
> 00:00:01   9.04  -0.09  14..g4 15.Nxb6 axb6 16.hxg4 Rg8 17.g5 hxg5
>                         18.Kg1
> 00:00:03  10.00  -0.17  14..g4 15.Nxb6 axb6 16.hxg4 Rg8 17.Qg3 Be6
>                         18.f3 Nc4
> 00:00:04  10.01  -0.13  14..Qg6 15.Nxb6 axb6 16.Be3 g4 17.hxg4 Bxg4
>                         18.Bxg4 Qxg4
> 00:00:10  11.00  -0.12  14..Qg6 15.f3 Qh5 16.Qa3 Ba5 17.b4 Bb6 18.Nxb6
>                         cxb6 19.Kg1 Qh4
> 00:00:26  12.00  -0.30  14..Qg6 15.f3 Qh5 16.Nxb6 axb6 17.Kg1 Bd7
>                         18.Be3 c5 19.Bc4 Qh4
> 00:00:37  12.01  -0.27  14..g4 15.Nxb6 axb6 16.hxg4 Ra4 17.f3 d5 18.g3
>                         dxe4
> 00:01:22  13.00  -0.58  14..g4 15.Nxb6 axb6 16.f4 gxf3 17.Rxf3 Qg6
>                         18.Bf4 Ra5
> 00:06:08  14.00  -0.92  14..g4 15.f4 gxf3 16.Rxf3 Qg7 17.Bf4 Bd7 18.Rd1
>                         f6
> 00:08:48  14.04  -0.85  14..Rb8 15.f4 gxf4 16.Bxf4 Rg8 17.g4 Qg7 18.Rad1
>                         Be6 19.Bxe5 Qxe5 20.Qxc6 Bd7 21.Qc4 d5
> 00:13:11  14.15  -0.68  14..Rg8 15.Nxb6 axb6 16.f4 gxf4 17.Bxf4 Qg7
>                         18.g4 Bd7 19.Bxe5 Qxe5 20.Qxe5 dxe5 21.Bc4
> 00:15:23  15.00  -0.89  14..Rg8 15.Nxb6 axb6 16.f4 gxf4 17.Bxf4 Qg7
>                         18.Rf2 Ra7 19.Bxe5
> 00:22:25  15.04  -0.77  14..g4 15.Nxb6 cxb6 16.f4 gxh3 17.gxh3 Qh4
>                         18.Kh2 Ng6 19.Rg1 O-O

Then back to 14..Rg8:

 00:50:22  16.00  -0.89  14..g4 15.Nxb6 axb6 16.f4 gxf3 17.Rxf3
 00:54:06  16.01  -0.69  14..Rg8 15.Nxb6 axb6 16.f4
 01:10:44  17.00  -0.69  14..Rg8 15.Nxb6 axb6 16.f4 gxf4 17.Bxf4



>
> Pro Deo 1.1 Vulcan after 16.Bxf4 also plays 16..0-0, still after 16   minutes.
>But 21.Bxh6! is crushing of course
>
>
> [D]r3k2r/pbp2p2/1bpp1q1p/4n3/N3PB2/2Q4P/PPP1B1P1/R4R1K b kq -
>
> 00:00:00   1.00  -0.36  16..O-O
> 00:00:00   1.01  -0.25  16..O-O-O
> 00:00:00   1.14  -0.02  16..Qe6
> 00:00:00   1.23  0.30  16..Qg7
> 00:00:00   2.00  -0.39  16..Qg7 17.Nxb6 axb6
> 00:00:00   3.00  -0.86  16..Qg7 17.Bxe5 Qxe5 18.Qxe5 dxe5
> 00:00:00   3.10  -0.54  16..Rg8 17.Nxb6 axb6 18.g3
> 00:00:00   4.00  -1.18  16..Rg8 17.Bxe5 Qxe5 18.Qxe5 dxe5 19.Rad1
> 00:00:00   4.01  -0.86  16..Qg7 17.Bxe5 dxe5 18.Nxb6 axb6 19.Qd3
> 00:00:00   5.00  -1.27  16..Qg7 17.Bxe5 Qxe5 18.Qxe5 dxe5 19.Rad1
>                         Rg8
> 00:00:00   5.01  -0.91  16..Rg8 17.Bxe5 Qxe5 18.Qxe5 dxe5 19.Rad1
>                         Bd4
> 00:00:00   6.00  -1.34  16..Rg8 17.Bxe5 Qxe5 18.Qxe5 dxe5 19.Bc4 O-O-O
>                         20.Rxf7
> 00:00:00   6.01  -1.21  16..Qg7 17.Bxe5 dxe5 18.Bc4 O-O 19.Nxb6 axb6
>                         20.Rad1
> 00:00:00   6.06  -1.08  16..Rh7 17.Bxe5 Qxe5 18.Qxe5 dxe5 19.Rad1
>                         Rg7 20.Bc4 Bd4
> 00:00:00   6.21  -1.07  16..Nd7 17.Qxf6 Nxf6 18.Nxb6 axb6 19.Bxd6
>                         cxd6 20.Rxf6 Ke7
> 00:00:00   7.00  -1.07  16..Nd7 17.Qxf6 Nxf6 18.Nxb6 axb6 19.Bxd6
>                         cxd6 20.Rxf6 Ke7
> 00:00:01   8.00  -1.07  16..Nd7 17.Qxf6 Nxf6 18.Nxb6 axb6 19.Bxd6
>                         cxd6 20.Rxf6 Ke7
> 00:00:02   9.00  -1.18  16..Nd7 17.Qxf6 Nxf6 18.Bxd6 Nxe4 19.Be5 Rf8
>                         20.Nxb6 axb6 21.Bxc7
> 00:00:03   9.05  -1.14  16..Rg8 17.Bxe5 Qxe5 18.Qxe5 dxe5 19.Bc4 Rg7
>                         20.Rf5 O-O-O 21.Bxf7
> 00:00:06  10.00  -1.14  16..Rg8 17.Bxe5 Qxe5 18.Qxe5 dxe5 19.Bc4 Rg7
>                         20.Nxb6 axb6 21.Rf6 c5 22.Bb5 c6 23.g4
> 00:00:23  11.00  -1.35  16..Rg8 17.Bxe5 Qxe5 18.Qxe5 dxe5 19.Bc4 Rg7
>                         20.Rf5 O-O-O 21.Bxf7 Rd6 22.Nxb6
> 00:00:30  11.01  -1.34  16..O-O 17.Rad1 c5 18.Rd3 Qg7 19.Rg3 Ng6 20.Qe3
> 00:01:09  12.00  -1.13  16..O-O 17.Qg3 Qg6 18.Qh4 Qxe4 19.Nc3 Qg6
>                         20.Bxh6 c5 21.Qg5 Rfe8 22.Rad1 Qxg5
> 00:02:01  13.00  -1.34  16..O-O 17.Rf3 c5 18.Rg3 Kh7 19.Rf1 Bc6 20.b3
> 00:03:54  13.05  -1.23  16..Rh7 17.Bc4 Rg7 18.Bxe5 Qxe5
> 00:05:50  14.00  -1.39  16..Rh7 17.Bg3 Qg7 18.Rad1 Nd7 19.Nxb6 axb6
> 00:08:13  14.01  -1.20  16..O-O 17.Qg3 Qg7 18.Qh4 Kh7
> 00:16:12  15.00  -1.27  16..O-O 17.Rf3 Qg7 18.Bxe5
>
> Eelco



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