Chechmate of the lion

The chechmate of the lion is more the possible small portion of failures, it makes only two blows. This part has especially an educational role: it shows the danger to push its pawns arbitrarily.

Course of the part

This part starts with: 1. g2-g4 e7-e5 2. f2-f3

The push of the white pawn G opens the Diagonale e1-h4, the white king being located in e1. As the push of the pawn E black made it possible to open the diagonal d8-h4 with the black lady, this one can thus move in a blow in h4 or it puts the black king in failure.

The white camp is then obliged to cover this failure. To cover a failure, a camp has three possibilities:

to capture the part or the pawn which put the king in failure
to interpose a part or a pawn between the part which puts the king in failure and the king (in the case of the Pièces with long range)
to move the king

Let us examine these three possibilities:

the black Lady can be captured
no part cannot interpose between the black Lady and the white King, nor even a pawn since they have already advanced
the king can move only in f2 where it would be always in failure

thus 2. … Dd8-h4 # (failure and chechmate)

Conclusion: the push g2-g4 was fatal with the white. In a general way, it is necessary to be very careful on the push g2-g4 or g7-g5 for the blacks if large the castling were not carried out, because if the king is in the center, the push opens the diagonal h4-e1 or h5-e8 and in the case of the king-side castling, that dislocates the structure of the pawns likely to protect the king.

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