Castle Footing Survey

Chording opens neighbors only when flags match the clue, with visible mines on failure. A second irregular ruins survey is fully solvable from supplied clues by local safe/mine deductions.

Survey an irregular castle floor. Missing corners are not cells; clue numbers count the eight available surrounding squares.

Tap or click the controls. Keyboard: Tab and Enter/Space operate every button; arrows/WASD move where available, R restarts, Z undoes calm puzzles.

This challenge has reachable failure. Restart returns to the same fair opening.