After 17.f4! whites pawns deny black the freeing move e5 as well as denying the black knights any outposts for counterplay.

26.d5!!. White has placed his pieces admirably while black remains tied down and now achieves the breakthrough.

31.Qxf5. White has liquidated into a winning endgame. Blacks position is littered with weaknesses and white keeps pressing them until the black position collapses.

36.Qd3! Removes the threat of black liquidating into an endgame where his queenside majority would provide counterplay.

39...f5 Another weakness in the black position which already hanging by a thread.

44.h3 Why risk a back rank mate when you have time to play this?

51.Rg6 and black is bust.

Excellent game.

After 36...Rd6 [see diagram]

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White has a passed pawn and Black's king position is weak. But Black also has a Queenside pawn majority which could be transformed into a passed pawn to create counterplay and force White to play very accurate. So White's next moves are directed against the Black pawn majority on the Queen's side.

After 40.Qd3 see diagram]

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Lasker after 40..a5: "Black is helpless. The b-pawn is backward, his king's side is disorganized and his king bereft of refuge. Alekhine wins methodically by making himself safe and slowly manoeuvering his opponent into zugzwang."

Alekhine claims "Zugzwang!" after 51.Rd3 and then gives the same variation and says "56.Qa7 with a mating attack"

Anybody see a mating attack or zugzwang? Position after 52..b5 53 axb Qxb5 54 Rc3! Qxd5 55 Rc7+ Kg6 56 Qa7

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http://www.russell-enterprises.com/...

<Game 103, Alekhine-Colle, Paris 1925:

This is actually a comment on the
Alekhine-Colle game from Baden-
Baden1925, which is included in the notes
to their game from Paris 1925. First, the
score given in the note to move 10 omits a
few repetitive moves. More importantly,
and as pointed out in the edition we edited
of Lasker’s Manual of Chess (Russell
Enterprises, 2008), a critical saving move
for Black was overlooked. At move 41 for
Black in Alekhine’s score (or move 45 in
Lasker’s),

cuuuuuuuuC
wDwDwD♖D
DwDqDpDk
w0w4wDw0
0wD♙DpDw
♙DwDwDwD
DwDw!wDw
wDwDw)♙)
DwD♖DwIw
vllllllllV

<<<rather than the immediate recapture 41...Kxg2?, Black could have drawn with
41...Qxa4!,>>> and after 42.Re1 Kxg8 White, to avoid losing to Black’s connected
passed pawns, has to force perpetual check
by, for example, 43.Qg3+ Rg6 44.>

45 ... ?

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White has just captured a Black rook on g8 with 45 ♖g3x♖g8. Should Black make the obvious recapture on g8 or does he have a better move?

Colle playing Black simply recaptured the White g8-rook and lost.

45 ... ♔h7x♖g8?

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Instead he could have forced White to take a perp by playing the *much* stronger <ZWISCHENZUG> 45 ... ♕d7xa4!, threatening mate on the <WEAK BACK RANK> while simultaneously creating <CONNECTED PASSERS> on the queenside.

(variation)
45 ... ♕d7xa4!=

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