A suffocating checkmate like the ancient Bạch Đằng battle, where the tide recedes to reveal sharp stakes waiting for the enemy. The Red side is left with only one Pawn, two Bishops, one Cannon, and the Advisors and General, but has cornered the Black General into a 'four-sided ambush' - two weak Advisors shielding, two Bishops adrift in the middle. Can Black escape the Red's 'repeated Cannon' strike, or will they fall like the Southern Han soldiers of old? Discover the tragic defense secrets where every move is a breathtaking escape.