The position of the black Cannon has rendered the Elephant at the base a “paralysed carriage” on Red’s final check with C8+4.

Another instance of the “Dashing the Heart” tactic with a Chariot, leading to a smothered checkmate. The Cannon check must be delivered before the Chariot sacrifice. Why?

The key move is Red’s R2=6, threatening C9+3 followed by R6+1. If Black tries to avoid smothered checkmate by playing A4+5, then comes the Iron Bolt checkmate after Red’s C9=5.

The critical move is #5/11 offering the Chariot the second time. R5=6 instead would be a fatal mistake, because Black could capture the Cannon with check, and turn the table around!