Wedge Rooms Solver

Wedge Rooms Solver — Step by Step

Click squares to make them black, type a number on a black square if it has one, then press Solve. Or play a generated puzzle and send it here with one click.

Wedge Rooms Solver: rules, how to use it, tips

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 rules

A triangle fills half of a white square, with its right angle in one of the four corners.
Every white area (including the white halves of triangle squares) must form a rectangle, upright or tilted at 45°.
A number on a black square is how many of its four side neighbours hold a triangle.
Black squares never hold triangles.

Using the solver

Choose the size, click the black squares and type their numbers (or press Sample).
Press Solve and step through: numbers and corner points, one triangle at a time.

Tips

Zeros. A 0 means its neighbours are all empty white (or black).
Corner points. Where white parts meet at a grid corner they must make a right angle (90°) or a straight line — never 45° or 270°.
Diamonds. Four triangles around a point, each pointing outwards, make the smallest tilted rectangle.
Walls and edges. A triangle against the grid edge or a black square points its dark corner at it.

The full guide, with a worked example and common mistakes: How to play Wedge Rooms.

Questions

Can a white area be a tilted square?

Yes — rectangles tilted at 45° (diamonds) count, as long as all their corners are right angles.

Do numbers count diagonal neighbours?

No — only the four squares directly above, below, left and right.

Is there always one answer?

Yes — every puzzle here is checked to have exactly one solution.

How do I solve one from a book?

Open the Wedge Rooms Solver, mark the black squares and numbers, and press Solve.