notyetagm: Position after 35 ... ♘f5-d4?? 36 c4-c5!:
 click for larger viewBlack's 35 ... ♘f5-d4?? made a <LOOSE> piece and 36 c4-c5! closed the line of the defending Black b6-queen (<INTERFERENCE>). Now in this position, the White c3-rook does -not-, repeat does -not- threaten the <UNDEFENDED> Black c8-rook because the White c3-rook has no <BALEFUL INFLUENCE> -through- the White c5-pawn. That is, the line of attack of the White c3-rook reaches only the c5-square because it is <BLOCKED> by its own White c5-pawn. But if Black captures the White c5-pawn with 36 ... d6xc5 in order to <DEFEND> his Black d4-knight, then everything changes with regard to the line of attack of the White c3-rook. (VAR) Position after 36 ... d6xc5:
 click for larger viewWhereas the White c3-rook had no <BALEFUL INFLUENCE> against the <UNDEFENDED> Black c8-rook with a -White- pawn on c5, the White c3-rook now does in fact threaten the <UNDEFENDED> Black c8-rook now that there is a -Black- pawn on c5. <<<That is, that the White c3-rook threatens c8 through the Black c5-pawn but not through the White c5-pawn!>>> The result of this <BALEFUL INFLUENCE> with the Black pawn being on c5 is that this pawn is <PINNED> against the <UNDEFENDED> Black c8-rook and thus cannot also <DEFEND> the Black d4-knight. Hence 37 ♖a4x♘d4! wins a whole piece for White. (VAR) Position after 36 ... d6xc5 37 ♖a4x♘d4!:
 click for larger viewThis Kasparov combination is the best example I have ever seen of the tactical idea <<<YOU OPEN LINES FOR YOUR OPPONENT'S LINE PIECES WHEN YOU CAPTURE HIS PAWNS>>>. |