notyetagm: Position after 28 ... ♖c8-e8?:
 click for larger viewAlekhine now wins material with 29 ♖c1x♘c5!, a combination based on the following tactical points <1) A DEFENDER WHOSE GUARD CAN BE REMOVED DOES NOT COUNT AS A DEFENDER AT ALL>
Since the Black c5-knight which <DEFENDS> the Black b7-queen can be captured (29 ♖c1x♘c5!),
the Black queen is effectively <UNDEFENDED> and lined up with the White f3-queen on the a8-h1 diagonal <2) BLOCKADERS DO NOT DEFEND, THEY ONLY BLOCKADE>
Black d6-pawn must <BLOCKADE> the White d5-pawn to prevent the <DISCOVERED ATTACK> d5-d6 so
it cannot leave the <BLOCKADING> d6-square and hence cannot <DEFEND> either c5 or e5 <3) ZWISCHENSCHACH (IN-BETWEEN CHECK)>
After 30 ... ♕b7x♕f3 White does not immediately recapture the queen but instead first interpolates
31 d6x♗e7+ ♖e8xe7, winning a piece for his pawn, and only -then- does he recapture the queen with
32 ♘d2x♕f3
The result of this beautiful <petite combinaison> is that White wins two pieces for a rook and a pawn,
a material advantage that Alekhine converts into a win. 29 ♖c1x♘c5! <remove the guard> d6x♖c5 <blockaders do not defend> 30 d5-d6 <discovered attack>
♕b7x♕f3 31 d6x♗e7+ <zwischenschach> ♖e8xe7 32 ♘d2x♕f3 Position after 32 ♘d2x♕f3 :
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