What a check is — answer this one
A check (将军) is any move that attacks the enemy general, and the attacked side must answer at once in one of three ways: move the general out of the line of fire, capture the checking piece, or block the line with another piece. Here Black's general stands alone on the e-file with Red's chariot bellowing at it from e1. With no piece to block or capture with, there is only one kind of answer left — make it.
Solve the challenge to finish this lesson.