A clean strike: Alberto C.'s knight topples the pawn on A3.

Rat's pawn advances from E7 to E6. Alberto C. advances the knight from A3 to C4, and rat sets the king on E7, watching every square.

A clean strike: Alberto C.'s knight topples the pawn on A5.

From the dark, Rat pushes the king to D6. From B7, Alberto C.'s knight forces Rat to defend.

Rat answers by moving the king from D6 to E7; then alberto C. slides the pawn across the board, from E2 to E3. With dungeon cunning, Rat brings the king to E8.

With a steady hand, Alberto C. brings the bishop to C4, and rat's king advances from E8 to F7. Alberto C. advances the knight from G1 to E2, while rat sets the knight on F6, watching every square.

Without hurry or fear, Alberto C. places the knight on F4. From the dark, Rat pushes the knight to D5; then alberto C.'s knight takes E2, leaving F4 behind.

Rat answers by moving the knight from D5 to B6. From B7 to C5, Alberto C.'s knight swallows Rat's pawn.

With dungeon cunning, Rat brings the king to G8. A clean strike: Alberto C.'s knight topples the pawn on E6.

Rat's pawn advances from C6 to C5. By taking the pawn on C7, Alberto C. drives Rat into check.

Rat sets the king on G7, watching every square. From E6, Alberto C.'s knight forces Rat to defend.

From the dark, Rat pushes the king to H7. From E6 to C5, Alberto C.'s knight swallows Rat's pawn.

Rat answers by moving the king from H7 to G7; then alberto C. slides the pawn across the board, from B2 to B3. With dungeon cunning, Rat brings the king to H6.

With a steady hand, Alberto C. brings the pawn to D4, and rat's king advances from H6 to G7. Alberto C. advances the pawn from E3 to E4, while rat sets the king on F6, watching every square.

Without hurry or fear, Alberto C. places the bishop on B2. From the dark, Rat pushes the king to G7.

From D5, Alberto C.'s pawn forces Rat to defend.

Rat answers by moving the king from G7 to G8. Check: Alberto C. tightens the net by bringing the pawn to D6.

With dungeon cunning, Rat brings the king to F8. With a steady hand, Alberto C. brings the bishop to D4, while rat's knight advances from B6 to D7.

By taking the knight on D7, Alberto C. drives Rat into check.

Rat sets the king on E8, watching every square. Check: Alberto C. tightens the net by bringing the knight to F6.

From the dark, Rat pushes the king to D8. Alberto C. gives check with the bishop on B6.

Rat answers by moving the king from D8 to C8. From E6, Alberto C.'s bishop forces Rat to defend.

With dungeon cunning, Rat brings the king to B7. With a steady hand, Alberto C. brings the bishop to E3, and rat's king advances from B7 to A8.

Alberto C. gives check with the bishop on D5.

Rat sets the king on B8, watching every square, and right after that without hurry or fear, Alberto C. places the pawn on D7. From the dark, Rat pushes the pawn to G5.

Alberto C. delivers the final mate from D8.