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Hugh Kennedy vs Jozsef Szen
London (1851), London ENG, rd 4
Sicilian Defense: Paulsen. Normal Variation (B45)  ·  1/2-1/2

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)7.Qd4 was played in Harmonist vs Schiffers, 1889 (1-0) 8...Nf6 9.Qf3 Bxc3 10.bxc3 dxe4 11.Bxe4 Nxe4 12.Rd1 = -0.04 (24 ply)better is 9.Qh5 Qc7 10.Be3 h6 11.exd5 exd5 12.Rfe1 Bd6 13.a3 O-O ⩲ +0.73 (19 ply)= +0.10 (23 ply) after 9...O-O 10.exd5 Bxc3 11.bxc3 cxd5 12.Qg3 Nf5 13.Qh3 g6 12.Ba3 Re8 13.Qd4 Qa5 14.Bb4 Qb6 15.f4 Ba6 16.Bd6 Bxd3 ⩲ +0.65 (27 ply)= -0.28 (24 ply) after 12...Qb6+ 13.Kh1 c5 14.Qe2 Rb8 15.Be3 Bd7 16.a4 Rfc8 better is 18...Rf7 19.Rf2 Qa3 20.Bd4 Raf8 21.Raf1 g6 22.Qh3 Qxa2 = -0.31 (21 ply)= +0.25 (23 ply) 20...h5 21.fxe6+ Kxe6 22.gxh5 Rxf1+ 23.Rxf1 Rh8 24.Bxa7 = 0.00 (23 ply) ⩲ +1.28 (24 ply) 25...Rxf5 26.Re1 Rg5+ 27.Kh2 Rh5+ 28.Kg2 Rg5+ 29.Kh3 ⩲ +1.23 (25 ply)+- +2.66 (21 ply) 28.Rb6+ Ke7 29.Rb7 Ke6 30.Ra7 Ba4 31.Ra6+ Ke7 32.e6 Be8 +- +3.28 (24 ply) ⩲ +1.06 (26 ply) 29.Rhxh7 Kxe5 30.Rbe7+ Kf4 31.Re2 Rg3 32.Rh4+ Rg4 33.Rh5 ⩲ +1.24 (27 ply)= 0.00 (37 ply) 33.Rg1 Ke6 34.Rxg5 Kxe5 35.Rg8 f4+ 36.Kd2 Bf5 37.Re8+ ⩲ +0.67 (30 ply) 33...Be4 34.Rg1 g4 35.Ke3 Ke6 36.Kf4 d4 37.cxd4 c3 38.Ke3 ⩱ -1.19 (30 ply)= 0.00 (39 ply) 34...Be4 35.Rh6+ Ke7 36.Rh5 g4 37.Rh7+ Ke6 38.Rg7 Bh1 = +0.19 (37 ply) ± +2.17 (30 ply) after 35.Rg1 Be4 36.Rxg5 a4 37.Rh5 f4 38.Rh6 Ke7 39.Rf6 f3 35...Kg7 36.Rh2 Be4 37.e6 f4 38.Ke5 f3 39.e7 Bg6 40.Kxd5 +- +2.78 (27 ply) 36.e6+ Kg7 37.Rh2 Bd1 38.Kxd5 g3 39.Rh3 f4 40.e7 Ba4 +- +4.87 (27 ply) 36...Kg7 37.Rh5 Kg6 38.Rh2 Be4+ 39.Kd6 g3 40.Rh3 f4 41.e6 ± +1.69 (28 ply)+- +5.74 (27 ply) 42.Rg4 Bd7 43.Rxg3 Kf6 44.Kxc4 Kf5 45.Re3 a4 46.Re7 Bc8 +- +7.34 (28 ply) 42...Bd7 43.Re4+ Kf6 44.Re3 g2 45.Rg3 Bc8 46.Kd4 Bb7 ± +1.53 (35 ply)+- +2.67 (35 ply)better is 44.Kd4 Kf5 45.Re1 Bf3 46.Ke3 Bd5 47.a3 Ke5 48.Rd1 Ke6 ± +2.47 (36 ply)+- +6.77 (29 ply)better is 46.Kd6 Be2 47.Rxg2 Ba6 48.Kc5 a4 49.c4 Ke4 50.Kb4 Kf4 +- +12.58 (26 ply)+- +3.48 (35 ply) 48.Kf2 Bd5 49.a3 Bc6 50.Re3 Be4 51.c4 Kf4 52.Re1 Kf5 +- +4.48 (36 ply) 48...Ke5 49.Rg5+ Kf6 50.Rg8 Ke5 51.a3 Bb7 52.Rg3 Bc6 ± +1.60 (45 ply)better is 49.Kf2 Ke5 50.Rd3 Be4 51.Rd2 Ba8 52.Rd8 Be4 53.a3 Bb7 +- +4.31 (36 ply) 49...Ke5 50.Rg8 Bb7 51.Rg5+ Kf6 52.Rg4 Kf5 53.Rg7 Kf6 ± +1.95 (55 ply) 50.Kf2 Ke5 51.Rg7 Bc6 52.Rg6 Be8 53.Rxg2 Kd4 54.Rg8 Bc6 +- +5.05 (37 ply) 50...Ke5 51.Kf2 Kd4 52.Rg4+ Kxc5 53.Rxa4 Kb5 54.Rb4+ Ka6 ⩲ +1.10 (55 ply)+- +2.87 (54 ply) 51...Ke4 52.Rxg2 Kd4 53.Rg5 Be8 54.Ke1 Bd7 55.Kd2 Kc4 +- +2.65 (51 ply)+- +7.04 (37 ply)58.Ra6 Bc2 59.Kxg2 Kd7 60.Kf2 Kc7 61.Ke3 Bd1 62.Kd4 Kb7 +- +13.18 (32 ply)1/2-1/2

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-28-15
Premium Chessgames Member
  offramp:


click for larger view

In this position white played a simple move, 21.Bc5, attacking the rook on f8.

Why didn't Szen just move the rook away? To b8 for example:

21... Rfb8


click for larger view

Then there would follow
22. fxe6+ Kxe6 23. Rf6+ Kxe5 24. Bd4+


click for larger view

24...Ke4 25. Re1#
So instead black decides to give up the exchange.

Much later, after 35...g4


click for larger view

...white missed a clever win:
36. e6+ Kg7 37. Rh2 Be4 38. Rh7+!

Later still,


click for larger view

41.Kd6 would have won fairly easily, even though black's pawns look threatening.

The final position:


click for larger view

...which is a clear win for white. Szen put many problems in white's way and if this game was drawn it is a good achievement.

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