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George Mackenzie vs George MacDonnell
MacDonnell - Mackenzie (1862/63), London ENG, rd 8, Dec-??
Formation: Hippopotamus (A00)  ·  1-0

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)4.Be3 was played in Keres vs R Pruun, 1933 (1-0)better is 5.h4 h6 6.a4 Bb7 7.a5 bxa5 8.Rxa5 Nf6 9.e5 Ne4 ⩲ +0.85 (21 ply)= +0.29 (24 ply)better is 6.Bf4 Ne7 7.h4 Nbc6 8.Qd2 h5 9.Be3 d6 10.O-O-O O-O ⩲ +0.72 (23 ply)= +0.12 (23 ply)better is 7...Nd7 8.O-O Ngf6 9.Rfe1 O-O 10.Bg5 Qb8 11.Rad1 a6 = +0.21 (25 ply)better is 8.Bh6 Bxh6 9.Qxh6 Ng8 10.Qf4 Nf6 11.O-O Nbd7 12.Rfe1 ⩲ +0.82 (27 ply)= +0.21 (25 ply)better is 9.Ng3 h5 10.h3 h4 11.Ne2 c5 12.c3 Nf6 13.Ng5 O-O 14.O-O ⩲ +0.61 (25 ply)= 0.00 (26 ply) 10...Ng4 11.Bg5 h6 12.Bh4 Nf6 13.e5 Nh7 14.Be4 Bxe4 = 0.00 (27 ply) 11.Bh6 O-O 12.Rad1 c5 13.e5 Ne8 14.Be4 d5 15.Bd3 c4 ⩲ +0.90 (26 ply) 11...Ng4 12.Bg5 f6 13.Be3 Nxe3 14.fxe3 Bh6 15.d5 e5 = -0.37 (26 ply) 12.Bh6 Ng4 13.Bxg7 Kxg7 14.Rad1 Nf6 15.Rfe1 Rad8 16.a3 ⩲ +1.04 (25 ply)= -0.20 (28 ply)better is 13.Bf4 e5 14.dxe5 dxe5 15.Bg5 h6 16.Be2 Qxd2 17.Bxd2 Nf6 = +0.03 (27 ply) ⩱ -0.67 (25 ply)better is 14...Bh6 15.Qf2 f5 16.exf5 Nxf5 17.Nxf5 exf5 18.d5 Rae8 ⩱ -0.78 (25 ply)= -0.28 (24 ply) after 15.Ne2 Rde8 16.Nf4 e5 17.Ne2 f5 18.d5 Bh6 19.Nc3 c6 better is 17.Bxf5 exf5 18.d5 Rde8 19.Nd4 Bh6 20.Nf1 Re7 21.b3 Rfe8 = -0.40 (28 ply) ⩱ -0.98 (25 ply) after 17...Qe7 18.Bxf5 exf5 19.d5 Rfe8 20.Nfd4 Qxe3 21.Qxe3 20...Rfe8 21.Qc3 Re4 22.Nd2 Re7 23.b3 Rde8 24.Re1 Re5 ⩱ -0.86 (28 ply)= +0.49 (28 ply) 21...Rfe8 22.h4 Rxe6 23.dxe6 Qxe6 24.Ng5 Bxg5 25.hxg5 = +0.08 (28 ply) 22.Nxf8 Qxf8 23.Re1 Re8 24.Qd3 Re7 25.Rfe2 g5 26.e4 fxe4 ⩲ +1.10 (28 ply)= -0.35 (30 ply)better is 32...Bxf5 33.Re3 Qh4 34.Rfe1 a6 35.R3e2 b5 36.Ne4 Qf4+ = +0.10 (32 ply) ⩲ +0.61 (31 ply)better is 33...Qg7 34.Qxg7+ Kxg7 35.Rfe1 R5f7 36.Ne4 Rd8 37.Nc3 a6 = +0.33 (29 ply)better is 34.Rfe1 R5f7 35.Ne4 Bf5 36.Kh1 Qd8 37.R3e2 Kh7 38.Kh2 ⩲ +0.84 (30 ply)= +0.25 (32 ply) after 34...Qf6 35.Qxf6 R5xf6 36.Rfe1 g5 37.Nd2 Bf5 38.b3 Kg7 better is 36.Nd2 Bg4 37.Ne4 Bf5 38.R3e2 Kh7 39.Qg3 Rd7 40.Qe3 Bxe4 ⩲ +0.90 (30 ply)= +0.21 (26 ply) 38...g5 39.Nd2 Qg6 40.b3 Rf4 41.Re7 R8f7 42.Rxf7 Rxf7 = +0.22 (29 ply) 39.Nd2 Qxb2 40.Ne4 Qd4 41.Nxd6 Rg7 42.Rf3 Rf6 43.Rxf6 ⩲ +1.37 (32 ply) 39...g5 40.Nd2 Qg6 41.Ne4 Rf4 42.Nc3 Kg7 43.Re7+ R8f7 = +0.47 (28 ply) ± +1.88 (38 ply)better is 46.Re7 Rd7 47.Re8 a6 48.R2e6 b5 49.Rg8 Rg7 50.Rh8+ Rh7 ± +1.82 (35 ply) 46...Rxf2 47.Kxf2 a6 48.a4 g4 49.hxg4 Rd7 50.Kf3 Kg5 ⩲ +1.26 (36 ply)+- +3.52 (31 ply)48...Rf4 49.Rd7 a6 50.Rc7 Rd4 51.Rc6 Rd3+ 52.Kg4 Rd2 +- +3.35 (32 ply)1-0

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
Mar-03-10
Premium Chessgames Member
  Chessical: MacDonnell plays a Modern/Robatsch defence, perhaps he believed that an "irregular" defence would particularly pose Mackenzie problems.

Unfortunately for MacDonnell, he failed to score in either game he used this defence in the match, and it did not go on to be a regular part of MacDonnell's tournament repertoire.

For Steinitz's take on the position as white see - Steinitz vs De Vere, 1866 (castle on Q-side and advance the <g> and <h> pawns.

MacDonnell was correct in so far as Mackenzie missed the best way to exploit his greater amount of space (Bh6), but MacDonnell was also unable to fully exploit the dynamic potential of the set up.

The game is consequently level for most of its course, until <38...Kh7?!>. With <38...g5> a draw would have been a legitimate result. It would have allowed MacDonnell to block the attack on his <d6> pawn which his actual strategy fails to do. For example:

<38... g5> 39. Nd2 Qg6 40. Ne4 Rf4 41. b3 b5 =

<46... Rdf8?!> is an admission of defeat: <46... Rxf2 47. Kxf2 a6 would at least have made Mackenzie further work for his point.

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