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Polugaevsky-Nezhmetdinov
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The Case for Using Probabilistic Knowledge in a Computer Chess Program (John L. Jerz)
Resilience in Man and Machine

Rybka 4.1 at 24 minutes per move, January 9 2012

Lev Polugaevsky - Nezhmetdinov [A54]

Sochi 28th RSFSR ch Sochi 28th RSFSR ch, 1958

[Deep Rybka 4.1 x64]

1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.e4 exd4 5.Qxd4 Nc6 6.Qd2 g6 7.b3 Bg7 8.Bb2 0–0 last book move

9.Bd3 -0.07/22 Ng4= 0.01/23 [9...Re8 10.Nge2 Nb4 11.Bb1 Nd7 12.0–0 Nc5 13.Nd5 Bxb2 14.Qxb2 Nxd5 15.exd5 c6 16.Nf4 Qg5 17.g3 Bd7 18.Bc2 Qe5 19.Qxe5 dxe5 20.dxc6 bxc6 21.Nd3 Nxd3 22.Bxd3 Rad8 23.Rfe1 Kg7= -0.07/22 ]

10.Nge2 -0.39/21 [10.Nf3 Bh6 11.Qd1 Nge5 12.0–0 Bg7 13.Nxe5 dxe5 14.Qd2 Nd4 15.Rad1 Re8 16.Nb5 b6 17.f3 Bb7 18.f4 a6 19.Nc3 Bh6 20.Qf2 Bxf4 21.g3= 0.01/23 ]

10...Qh4= -0.06/21 [10...Nce5 11.Nf4 Bh6 12.Be2 f5 13.g3 fxe4 14.Nxe4 Bf5 15.Qd4 Bg7 16.Qd5+ Rf7 17.Ne6 Bxe4 18.Qxe4 Qe7 19.Nxg7 Nxf2 20.Qxb7 Nfd3+ 21.Kd2 Rd8 22.Bd4 d5 23.c5 Nc4+ 24.bxc4 dxc4 25.Bxd3 Rxd4 -0.39/21 ]

11.Ng3 -1.61/26 [11.g3 Qh6 12.Qxh6 Nxh6 13.Nf4 Bg4 14.h3 Bf3 15.0–0 Ne5 16.Bc2 g5 17.Nfd5 c6 18.Ne3 Rae8 19.Rfe1 Nd7 20.a4 Nc5 21.b4 Bxc3 22.Bxc3 Nxe4 23.Bd4 a6 24.c5 dxc5= -0.06/21 ]

11...Nge5= 0.00/22 [11...f5 12.exf5 Nb4 13.Be4 Bxf5 14.Bxf5 Rae8+ 15.Nce2 Rxf5 16.0-0-0 Bxb2+ 17.Kxb2 Qf6+ 18.Kb1 Rxf2 19.Rdf1 a5 20.a3 Nc6 21.Qd5+ Kh8 22.Rxf2 Qxf2 23.Rf1 Qb6 24.Ka2 Nce5 25.Rb1 Nf6 26.Qd4 Qc6 -1.61/26 ]

12.0–0 -0.44/22 [12.Be2 Bh6 13.Qd1 f5 14.exf5 gxf5 15.0–0 f4 16.Qd5+ Kh8 17.Qe4 Qd8 18.Bc1 Rf6 19.Nh5 Bf5 20.Qd5 Be6 21.Qe4 Bf5 22.Qd5 Be6 23.Qe4 Bf5 24.Qd5 Be6 25.Qe4 Bf5 26.Qd5 Be6 27.Qe4= 0.00/22 ]

12...f5= 0.00/21 [12...Ng4 13.h3 Nxf2 14.Rxf2* Qxg3 15.Ne2 Qh4 16.Bxg7 Kxg7 17.Nf4 Ne5 18.Bf1 Be6 19.c5 Qe7 20.Rc1 Rac8 21.Qe3 a6 22.Qd4 Rcd8 23.Be2 Kg8 24.Qb4 Rb8 25.Qc3 -0.44/22 ]

13.f3 -1.07/22 [13.exf5 Qd4 14.Rfd1 Nxd3 15.Qxd3 Qxd3 16.Rxd3 Bxf5 17.Nxf5 Rxf5 18.Rd2 Re8 19.Nd5 Bxb2 20.Rxb2 Rf7 21.Rd2 Ne5 22.f4 Ng4 23.g3 Kg7 24.Rc1 c6 25.Nc3 Rf6 26.Kg2 Ne3+ 27.Kf3 Rfe6= 0.00/21 ]

13...Bh6 -1.05/22

14.Qd1 -1.47/24 f4= -0.24/24 [14...Be3+ 15.Kh1 f4 16.Nge2 g5 17.Nd5 g4 18.g3 fxg3 19.Nxg3 Bd4 20.Bxd4 Nxd4 21.f4 Nef3 22.Rf2 c6 23.Ne3 Rxf4 24.Be2 c5 25.Bxf3 Rxf3 26.Rxf3 gxf3 27.Ngf5 Bxf5 28.Nxf5 Qf6 29.Nxd4 cxd4 -1.47/24 ]

15.Nge2 -0.24/23 g5 -0.20/23

16.Nd5 -0.20/22 g4= -0.04/22 [16...Rf7 17.Rf2 Bg7 18.Rb1 g4 19.Nexf4 gxf3 20.g3 Qg5 21.Qd2 h5 22.Kh1 a5 23.Rg1 Nxd3 24.Qxd3 Bxb2 25.Rxb2 Ne5 26.Qd4= -0.20/22 ]

17.g3 -0.04/20 fxg3= 0.00/22 [17...Qd8 18.Nexf4 gxf3 19.Bc2 Rf7 20.Kh1 a5 21.Qd2 Bg4 22.Rad1 Qg5 23.Bc3 Qg7 24.Rf2 Bg5 25.Ne3 Bxf4 26.gxf4 Rxf4= -0.04/20 ]

18.hxg3 0.00/22 Qh3 0.00/22

19.f4 0.00/21 Be6 0.00/21

20.Bc2 -0.83/18 [20.Bxe5 Nxe5 21.Kf2 Qh2+ 22.Ke3 Qh3 23.Kf2 Qh2+ 24.Ke3 Qh3 25.Kf2 Qh2+ 26.Ke3 Qh3 27.Kf2 Qh2+ 28.Ke3 Qh3 29.Kf2 Qh2+ 30.Ke3 Qh3 31.Kf2 Qh2+ 32.Ke3 Qh3 33.Kf2 Qh2+ 34.Ke3 Qh3 35.Kf2= 0.00/21 ]

20...Rf7= 0.00/21 [20...Bxd5 21.Qxd5+ Rf7 22.Bc3 Kf8 23.Kf2 Bxf4 24.Qxf7+ Nxf7 25.Rh1 Be5 26.Rxh3 gxh3 27.Rh1 Bxc3 28.Nxc3 Ng5 29.Nd5 Ne5 30.Nf4 Ng4+ 31.Ke1 h2 32.Bd1 Nf6 33.Nd5 Nfxe4 34.Nxc7 Rc8 35.Nb5 d5� -0.83/18 ]

21.Kf2 -0.27/20 [21.Bxe5 Nxe5 22.Kf2 Qh2+ 23.Ke3 Bxd5 24.Qxd5 Qh3 25.Rg1 Kg7 26.Raf1 Raf8 27.Kd2 Nf3+ 28.Kc1 Nxg1 29.Rxg1 Qh2 30.Bd3 c6 31.Qd4+ Kg8 32.Rd1 Rd8 33.c5 d5 34.e5 Bg7 35.Kb1 Re8 36.Qc3= 0.00/21 ]

21...Qh2+ 0.00/21

22.Ke3 -0.12/21 Bxd5 0.00/21

23.cxd5 -0.12/21 Nb4 0.00/20

24.Rh1??–+ -2.94/20 [24.a3 Nxc2+ 25.Qxc2 Raf8** 26.Rh1 Rxf4 27.Rxh2 Rf3+ 28.Kd4 Be3+ 29.Kc3 Bc5+ 30.Kd2 Be3+ 31.Kc3 Bc5+ 32.Kd2 Be3+ 33.Kc3 Bc5+ 34.Kd2 Be3+ 35.Kc3 Bc5+ 36.Kd2 Be3+ 37.Kc3 Bc5+ 38.Kd2 Be3+ 39.Kc3= 0.00/20 ]

24...Rxf4 -2.94/20

25.Rxh2 -2.94/19 Rf3+ -2.94/13

26.Kd4 -2.94/19 Bg7 -2.94/18

27.a4? -#8/27 [27.Nf4 b5 28.Qxf3 Nxf3+ 29.Ke3 Bxb2 30.Rah1 Bd4+ 31.Ke2 Nxh2 32.Rxh2 Nxc2 33.Rh4 Bf6 34.Rxg4+ Kf7 35.Nh5 Be5 36.Rh4 Rg8 37.Rh3 Ke8 38.Kd2 Nd4 39.Kd3 Kd7 40.Nf4 Rg7 41.Nh5 Rf7 42.Nf4 -+  -4.05/29]

27...c5+ -#79/2

28.dxc6 -#7/29 bxc6 -#6/27

29.Bd3 -#6/28 Nexd3+ -#5/28

30.Kc4 -#5/32 d5+ -#79/1

31.exd5 -#4/31 cxd5+ -#3/5

32.Kb5 -#3/49 Rb8+ -#2/11

33.Ka5 -#2/59 Nc6+ -#1/13 0–1

*-0.41/30 14...Qxg3 15.Ne2 Qh4 16.Bxg7 Kxg7 17.Nf4 Ne5 18.Rd1 Be6 19.Qc3 Qe7 20.c5 Kg8 21.Bf1 Rfd8 22.Rfd2 a6 23.Qb4 a5 24.Qc3

**25...Qh3! (a) [-0.39]  d=29  26.Bxe5 dxe5 27.Kd3 Qg2 28.Qc5 exf4 29.gxf4 Bg7 30.Qe3 Bxa1 31.Rxa1*** Qh2 32.Rg1 Rg7 33.f5 Qd6 34.Nf4 Qxa3 35.Kc2 Qa2+ 36.Kc3 c6 37.d6 Qa5+ 38.Kc2 Qe5 39.Ne6 Rd7 40.Rxg4+ Kh8 41.Qc5

(b) [-0.50]  d=27  26.Bxe5 dxe5 27.Kd3 Qg2 28.Rh1 Qf3+ 29.Kd2 exf4 30.Qd3 Bg7 31.Raf1 Qxd3+ 32.Kxd3 f3 33.Nd4 Bxd4 34.Kxd4 Rd8 35.Rh4 Rg7 36.e5 Rg5 37.Rfh1 h5 38.Rxh5 Rxh5 39.Rxh5 Rf8 40.Rh1 f2 41.Rf1 and now 41...Rf3 and white might salvage a draw due to a better placed king

(c) 26.Kd2?! -0.94/22 26...Nf3+ 27.Kd3 Re8 28.Rh1 Qg2 29.Rxh6 Rxe4 30.Qd1 Rfe7 31.Re6 R7xe6 32.dxe6 Rxe6 33.Qf1 Qh2 34.f5 Re8 35.Rc1 d5 36.a4 c6 37.f6 Kf7 38.a5 Qh5 39.Bd4 Qf5+ 40.Kc3 h5 41.Nf4 Nxd4

***-0.26/27 31...Qh2 32.Rg1 Rg7 33.f5 Qd6 34.Nf4 c6 35.Ne6 cxd5 36.Nxg7 dxe4+ 37.Ke2 Qh2+ 38.Qf2 Qxf2+ 39.Kxf2 Kxg7 40.Rxg4+ Kf6 41.Rxe4 h5 42.Kg3 Kxf5 43.Re7 Rb8 44.Kh4 a6 45.Rh7 Ke5 46.Kxh5 b5

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