PAINT TRAIL MAZE · TAPCAPER

Level 112: Signal quartet

7 × 6 · 32 paint targets · switch & gate

CORAL STUDIO · HARD

Level 112 /120

Signal quartet

3% painted0 moves26 proven minimum
Switch A: toggles its matching gates on every visitASwitch A: toggles its matching gates on every visitAGate B: closedBSwitch B: toggles its matching gates on every visitBSwitch B: toggles its matching gates on every visitBGate A: closedA

Slide to the wall. Paint every dotted floor tile.

Best: not yet painted. 0/120 complete. New ball skins at 10, 20 and 30 clears.

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Reading this maze

Signal quartet starts at row 4, column 3. Of the 42 grid positions, 32 are paintable and 10 are walls. The start is already painted; the other 31 tiles remain to be reached.

Diamonds A at row 1, column 3 and row 3, column 5 toggle the gate marked A. Diamonds B at row 5, column 5 and row 5, column 7 toggle the gate marked B. Start right and stop at row 4, column 5. Either matching diamond flips its letter; both A diamonds share A, and both B diamonds share B. The first slide covers 3 of 32 target tiles.

The verified opening crosses 2 tiles before stopping. A breadth-first search proves a 26-slide finish from this exact starting board; that is a reference target, not a move limit. You may revisit any painted tile.

Opening board for Signal quartet: 32 paintable tiles, ball at row 4, column 3

Diamonds A and B control separate gate groups. Each letter toggles only its matching barred gate; the other group keeps its current state. Changes take effect during the same slide. Undo restores both groups, and Hint searches from both gate states and the painted floor.