Blocking the king's escape

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tactic :: blocking
the double attack | pinning | the discovered attack | the X-ray attack | interception | removing the defender | blocking | freeing | overloading | the intermediate move | deflection | decoying | king's pawns structure | forcing stalemate

Blocking the king's escape

This tactical procedure involves blocking the square on which the king could escape.

In the next game White has more valuable pieces than his opponent. But, Black compensates that by having the possibility of a good move. If Black were to check his opponent's king by moving the queen at a1 then the king could escape to b5 and then perform a powerful counterattack which would lead to White's defeat (the Black king is under serious pressure from both rooks and the knight). The Right move Black should do is 1...b6-b5+. This move blocked the white king's escape. Now White has no possibility of defending himself; even if he captures the pawn c4:b6 the escape square the king still remains blocked and Black can still perform the checkmate: Qe5-a1checkmate

Blocking example. Now, that the king is blocked, Black can perform the checkmate

What follows is a classic example of using blocking. White has his turn to move. He will force Black to block his own king by moving 1. Qg8! R:g8 (the only possible move) and now that the king is blocked he can be easily checkmated Nf7 checkmate. This type of checkmate is called etouffe; the term 'etouffe' is french and it means suffocated. It's called this way because the king is stopped from moving by its own pieces (he is suffocated).

A classic example of using blocking