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Johannes Zukertort vs George Mackenzie
Paris (1878), Paris FRA, rd 3, Jun-21
Four Knights Game: Double Spanish (C49)  ·  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)better is 10.b4 Ba7 11.Bb3 Nxd5 12.Bxd5 Qf6 13.Bb3 Be6 14.Be3 Ne7 = +0.19 (23 ply)better is 10...Nxd5 11.exd5 Bxe3 12.dxc6 Ba7 13.Re1 Rb8 14.d4 exd4 = -0.31 (22 ply) 11.Nxe3 b5 12.Bb3 Rb8 13.Re1 Bd7 14.a3 Re8 15.Rb1 Na5 = +0.24 (22 ply) ⩱ -0.55 (23 ply)better is 19.Qf2 a5 20.Bc4 Rac8 21.Bd3 a4 22.b4 axb3 23.axb3 c6 = -0.05 (22 ply) ⩱ -0.72 (23 ply)better is 20...g5 21.Qc3 Nxf3+ 22.Qxf3 Qe5 23.Rd2 Be8 24.Bd1 a5 ⩱ -0.87 (25 ply)= -0.26 (24 ply) 22.Rc1 Bh5 23.Rf2 Bg6 24.Qd2 Qg5 25.Rcf1 Rf6 26.Ba4 Raf8 = -0.18 (23 ply) ⩱ -0.97 (21 ply) after 22...h5 23.e5 dxe5 24.Bc2+ Bg6 25.Bxg6+ Kxg6 26.Qe4+ Kh6 better is 24...Qf6 25.Qd4 Qg5 26.Re1 h5 27.Qf2 Kg8 28.h4 Qe5 29.g5 ⩱ -1.34 (25 ply)better is 25.b4 Qg5 26.Re1 c6 27.dxc6 bxc6 28.Kh2 Qe5 29.Rf1 Bf7 ⩱ -0.66 (21 ply) ⩱ -1.21 (22 ply) after 25...Qf6 26.Re1 Kg8 27.h4 Bh7 28.Re2 Re7 29.h5 Re5 30.Kf1 better is 26...Kg8 27.b4 Qf6 28.h4 Bh7 29.c5 g5 30.Rh3 gxh4 31.Qxh4 ⩱ -1.22 (22 ply) 27.c5 Kg8 28.cxd6 cxd6 29.Kg2 b5 30.b4 h5 31.h4 Qe7 = -0.48 (22 ply)better is 27...Kg8 28.Kg2 Qf6 29.h4 Bh7 30.b4 g5 31.h5 Qe7 32.Qd4 ⩱ -1.47 (22 ply)better is 28.Qd2 Qg5 29.Ref1 Re7 30.Kg1 Ref7 31.Qf2 Kg8 32.b4 h5 ⩱ -0.84 (23 ply) 28...Kg8 29.Kg1 Bh7 30.Re2 g5 31.Rh3 h5 32.Qf3 gxh4 ∓ -1.51 (22 ply) 29.Kg2 Kg8 30.Rxf4 Rxf4 31.Qxf4 Qxh4 32.Rf1 Qe7 33.Re1 = -0.50 (22 ply) ∓ -1.71 (24 ply)better is 30.Rg1 Bd7 31.Kh1 Qf6 32.Qh2 Kg8 33.Rgf1 Qg5 34.Rxf4 ⩱ -1.35 (25 ply) ∓ -1.85 (27 ply) 36.Qf3 Qe8 37.Kf1 Kg8 38.Qf2 Rh5 39.Rh4 Rg5 40.Qh2 Qf7+ ∓ -2.15 (23 ply) 36...Qd1 37.Qe3 Kg8 38.Qf3 Qd2+ 39.Be2 Kh7 40.Rf7 Be8 -+ -3.11 (24 ply) 37.Ke3 Qe8 38.Rf2 Rg5 39.Qf3 Rf5 40.Qg3 Rxf2 41.Qxf2 Qe7 ∓ -1.63 (23 ply)-+ -2.59 (26 ply) after 37...Qh1 38.Qf3 Qxf3+ 39.Rxf3 Rxe4 40.Bd3 Rh4 41.Bg6 38.Bg4 Bxg4 39.Qxg4 Qxg4 40.Rxg4 g5 41.Ke3 h5 42.Rg2 Kf7 ∓ -2.02 (26 ply)-+ -3.12 (24 ply) 39.Qg2 Rg5 40.Qf3 Qe5 41.Rf8+ Kh7 42.Qc3 Qh2+ 43.Ke1 Rg2 -+ -2.80 (25 ply)-+ -4.24 (26 ply) 43.Qg3 Re7 44.Kg2 Qxb2+ 45.Rf2 Qe5 46.Qxe5 Rxe5 47.Kg3 -+ -2.82 (23 ply)-+ -6.06 (21 ply)-+ mate-in-8 after 53...h1=N+ 54.Rxh1 Rxh1 55.Qe8 Qxe8 56.Ke3 Qxe5+; 54.Kf3 h1=Q+ 55.Rxh1 Rxh1 56.Qb4 Bh5+ 57.Ke3 Qg5+ 58.Qf4 -+ mate-in-110-1

rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1
FEN COPIED

Annotations by Stockfish (Computer).      [35434 more games annotated by Stockfish]

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Kibitzer's Corner
Feb-20-08  Knight13: Maybe 31. Rxf4 might've looked like a mistake, but defending the pawn with Rg1 and Kh3 would've been worse since Black could strike with ...g6 followed by ...h5 and by then white wouldn't be very happy.

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