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Subject: Re: Bxh2+ probably is the better move... chosen for the right reason?

Author: Albert Silver

Date: 18:37:18 05/24/00

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On May 24, 2000 at 17:14:21, Dann Corbit wrote:

>
>Once again, Dusan Dobes shows us that he is a genius:
>[ white, 1 ]
>4r1k1/1b3pp1/pp3n1p/1P2b3/3q4/2NBB3/P4PPP/1QR3K1 b - -
>
>4r1k1/1b3pp1/pp3n1p/1P2b3/3q4/2NBB3/P4PPP/1QR3K1 b - -
>    -> soft time limit 1714.28 s
>    -> hard time limit 31999.9 s
>  4 ->   0:00.75    27018   0 turns
>  5     54    94    35153  Qd4-g4  Bd3-f1  Qg4-h4  Ph2-h3
>  5 ->   0:02.31    86337   0 turns
>  6     27   321   128755  Qd4-g4  Bd3-f1  Qg4-h4  Ph2-h3  Pa6xb5  Qb1xb5
>                           Re8-e6
>  6     32   362   147293  Be5xh2  !
>  6     87   413   170479  Be5xh2  !!
>  6    146   672   284835  Be5xh2  Kg1xh2  Nf6-g4  Kh2-h3  Ng4xe3
>  6 ->   0:08.15   354026   1 turn
>  7    206  1132   491688  Be5xh2  !!
>  7    256  2960  1304025  Be5xh2  Kg1xh2  Re8xe3  Pf2xe3
>  7 ->   0:36.73  1681106   0 turns
>  8    316  5075  2287377  Be5xh2  !!
>  8    387 11793  5374407  Be5xh2  Kg1-f1  Re8xe3  Pf2xe3  Qd4xe3  Nc3-e2
>                           Nf6-g4  Bd3-h7  Kg8-h8  Qb1-f5  Qe3xc1  Ne2xc1
>                           Ng4-e3  Kf1-e2  Ne3xf5  Bh7xf5  Pa6xb5
>  8 ->   2:13.31  6081022   0 turns
>  9    394 31699 14132932  Be5xh2  Kg1xh2  Re8xe3  Bd3-h7  Kg8-h8  Pf2xe3
>                           Qd4-e5  Kh2-h3  Qe5xe3  Pg2-g3
>
>Why is his eval ten times better than everyone else?  He cleary finds the best
>line in far fewer plies consistently.
>
>I am awestruck by the eval of Phalanx.

Here is the output of Tiger in CA5. You have to discount 5 seconds as it starts
the clock 5 seconds before the engine actually kicks in.

[-0.32]  d=5  1...Qg4 2.Bf1 Ne4 3.Nxe4 Bxe4 4.Qb3 (0:00.05)
[-0.00]  d=6  1...Qg4 2.Bf1 Bxc3 3.Rxc3 Be4 4.Qb3 Nd5 (0:00.05)
[-0.02]  d=6  1...Bxh2 (0:00.06)
[-0.06]  d=6  1...Bxh2 2.Kxh2 Qg4 3.Ne4 Rxe4 (0:00.06)
[-0.96]  d=7  1...Bxh2 (0:00.09)
[-1.96]  d=7  1...Bxh2 2.Kxh2 Ng4 3.Kh3 Nxe3 4.f3 Qe5 5.Ne4 axb5 6.Qxb5 Qxb5
7.Bxb5 Re5 (0:00.11)
[-2.16]  d=8  1...Bxh2 2.Kxh2 Ng4 3.Kh3 Nxe3 4.f3 Qe5 5.Ne4 Qf4 6.bxa6 Bc8
7.Rxc8 Rxc8 8.Qxb6 (0:00.13)
[-2.30]  d=9  1...Bxh2 2.Kxh2 Ng4 3.Kh3 Nxe3 4.f3 Qe5 5.Be4 Bxe4 6.Nxe4 Qxb5
7.Qxb5 axb5 (0:00.18)
[-2.76]  d=10  1...Bxh2 2.Kxh2 Ng4 3.Kh3 Nxe3 4.Bh7 Kf8 5.fxe3 Rxe3 6.Kh2 Rxc3
7.Rxc3 Qxc3 8.bxa6 Qe5 9.Kh1 (0:00.48)
[-3.66]  d=11  1...Bxh2 (0:02.04)
[-5.06]  d=11  1...Bxh2 2.Kf1 (0:03.36)
[-5.70]  d=12  1...Bxh2 2.Kxh2 Ng4 3.Kg1 (0:07.17)
[-6.08]  d=13  1...Bxh2 2.Kf1 Rxe3 3.fxe3 Qxe3 4.Rd1 (0:23.25)

Not too crappy either.  :-)

                                    Albert Silver



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