The grid has black squares, some with numbers. Fill some of the white squares with a dark triangle covering half the square — its right angle in one of the four corners. When you’re done, every white area must be a rectangle: either upright, or tilted at 45° like a diamond.
A number on a black square tells you how many of the four squares directly next to it (above, below, left and right) hold a triangle. White squares that stay empty are just white.
The key idea: wherever white parts meet at a corner point of the grid, they must form a right angle or a straight line — never a 45° point or a dent.
Put dark half-square triangles in some white squares so that every white area becomes a rectangle — upright or tilted 45° — and every number counts the triangles beside it.
The full guide, with a worked example and common mistakes: How to play Wedge Rooms.
Yes — rectangles tilted at 45° (diamonds) count, as long as all their corners are right angles.
No — only the four squares directly above, below, left and right.
Yes — every puzzle here is checked to have exactly one solution.
Open the Wedge Rooms Solver, mark the black squares and numbers, and press Solve.