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George Henry Mackenzie vs George MacDonnell
MacDonnell - Mackenzie (1862/63), London ENG, rd 4, Dec-??
Philidor Defense: Exchange Variation (C41)  ·  0-1



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Kibitzer's Corner
Premium Chessgames Member
  Chessical: MacDonnell achieves equality with his favourite Philidor Defence using a different variation to the second match game in which he was overwhelmed on the King-side. This time, he takes his lead from Morphy

De Vere vs G MacDonnell, 1866

He obviously believed that this was a superior scheme of development, because he used it again:

De Vere vs G MacDonnell, 1866

<6. Qb4!?> is suggested by computers as a sharper way to gain an advantage as White.

Mackenzie's <22. g4!?> is loosening, he could have played more safely either with <22. Bf1> or <22. Nf5>.

MacDonnell destroys Mackenzie's King-side pawn cover and also obtains Bishop and a Knight for a Rook and two pawns, but he does not get an outright winning position.

Move 26, White to play:

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Mackenzie has the harder job in organising his forces, and small errors take their toll more on him than his opponent. <30. Nd4> is a visually nice position for the Knight, but it allows MacDonnell to manoeuvre his Rook to <e5> and thence to the K-side. <30. Kg2> seems more attentive to the needs of Mackenzie's King.

MacDonnell misses the most convincing continuation of: <31... Rg5+!> 32. Kf1 Rh5 33. Rg3 Rh1+ 34. Rg1 Qh2 35. Qxh2 Rxh2; but Mackenzie still finds it difficult to regain and then equality due to his exposed King. Thus, assisted by MacDonnell's failure to play his Rook to the <h> file with numerous threats

<55. Rc1+?!> allows MacDonnell to mobilize his King side pawns <55. Bf5+!> (instead of much less effectively two moves later) and then <55. e5?!> loses a piece.

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Game 4. MacDonnell demolishes his opponent's K-side.
from MacDonnell - Mackenzie 1862/63 (1862) by Chessical

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