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Boris Spassky vs Lajos Portisch
Toluca Interzonal (1982), Toluca de Lerdo MEX, rd 9, Aug-21
Sicilian Defense: Closed Variation (B25)  ·  0-1

8
7
6
5
4
3
2
a
1
b
c
d
e
f
g
h
White to move.
ANALYSIS [x]
Notes by Stockfish 9 v010218 (minimum 6s/ply)11...Nec6 was played in K Ramirez Jimenez vs D Cordero, 2006 (0-1) 13.b4 cxb4 14.Rxb4 e5 15.c4 Bh3 16.Bg2 Bxg2 17.Kxg2 f5 = 0.00 (22 ply) ⩱ -0.77 (19 ply) 18...b5 19.cxb5 Qxb5 20.b3 a5 21.Bg2 a4 22.Rb1 axb3 ⩱ -0.83 (20 ply) 19.exf5 Nd4 20.Bxd4 Bxd4+ 21.Kh1 Bxf3+ 22.Rxf3 Qc6 = 0.00 (25 ply) ⩱ -0.87 (22 ply) 21.Bxd4 Bxd4 22.Bxe4 d5 23.cxd5 Bxd5 24.f5 gxf5 25.Nxf5 = -0.32 (23 ply) ⩱ -1.34 (23 ply)better is 25.Bxh3 Rxe4 26.Bxd7 Re3+ 27.Kg1 Rxd3 28.Ng3 Rd2 29.Ne4 ⩱ -0.79 (25 ply) ⩱ -1.39 (20 ply) after 25...Qe6 26.Qb3 d3 27.Qxd3 Bxe4 28.Qxe4 Qxe4 29.Bxe4 better is 27...d3 28.Qxd3 Bxe4 29.Bxe4 Qxe4 30.Qd5+ Kh7 31.b3 g4 ⩱ -1.39 (21 ply) ⩱ -0.74 (23 ply)better is 30.b3 a6 31.Nc7 Rd7 32.Nd5 Qd4+ 33.Qf2 Be5 34.a4 Rg7+ = -0.10 (23 ply)better is 30...Qxb2 31.Qxb2 Bxb2 32.Nb5 Be5 33.Re2 Bc8 34.Kf2 Be6 ⩱ -0.62 (23 ply)= -0.08 (25 ply)better is 32.Rb1 Qg6+ 33.Kf2 Qg5 34.Rg1 Qc5+ 35.Qd4 Kh8 36.Qxc5 = -0.13 (22 ply) ⩱ -0.65 (24 ply)better is 34.Rf2 Rg6+ 35.Kf1 Rb3 36.Rd1 Be5 37.Nd4 Ra3 38.Nf5 Bf6 ⩱ -0.69 (22 ply) ⩱ -1.39 (26 ply) 37.Nc3 Rgg2 38.Rxh3 Bxc3 39.Rxc3 Rxh2+ 40.Kg1 Rhg2+ ⩱ -1.30 (26 ply)-+ -3.00 (27 ply) 38.Rg1 Rbg2 39.Rxg2 fxg2+ 40.Kg1 Rg4 41.Rh5 Bf4 42.Rh3 -+ -3.17 (28 ply)-+ -15.69 (30 ply) 39...f2 40.Rg3 Rxh2+ 41.Kxh2 Rxg3 42.Kh1 Bf4 43.Rf1 Be3 -+ -16.78 (33 ply)-+ -3.82 (32 ply)44.Rd6+ Ke7 45.Re6+ Kxe6 46.Ng5+ R6xg5 47.Rxe3+ Kd7 -+ mate-in-70-1

rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1
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Given 7 times; par: 84 [what's this?]

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Kibitzer's Corner
Oct-24-16  antonioaguilar: Dont push g4 when Black can answer with f5! Portisch perfectly shows why.

It is interesting to see how Black can refute <14.g5> with many moves. The line I like the most is <14.g5 e5 15.Bg2 d5!>

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