our hero's king takes D1, leaving E1 behind. Check from Captain: the pawn plants itself on C2.

our hero slides the king across the board, from D1 to C1, and right after that with dungeon cunning, Captain brings the rook to E4. With a steady hand, our hero brings the knight to F3; then captain's pawn advances from B5 to B4.

our hero advances the knight from F3 to D2. Check from Captain: the rook plants itself on E1.

Without hurry or fear, our hero places the king on B2. On C1, Captain promotes and gains a reinforcing queen.

our hero's king takes A2, leaving B2 behind. Captain's edge falls on D2 and it is mate against our hero.