The black king is trapped in a hallway — its diagonal escape squares are blocked. Weave the mating net, then deliver checkmate.
The highlighted piece is yours to move. Click a destination square. Each step is judged by result: does your move achieve the goal?
Checklist: weave → block the king's escape. protect → guard the mating square. mate → deliver checkmate.
Build your streak to reach harder stages. Your clock replenishes on correct answers — run out of time and the game ends.