Futoshiki

Rules

• Fill the grid so every row and column contains each number once.
• Where a sign sits between two squares, the numbers must respect it: the open side faces the larger number.
• Every puzzle has one solution and never needs a guess.

Difficulty

Difficulty is how far the signs must be followed: single signs for Easy, chains of signs and pairs for Hard. Every puzzle here has exactly one solution, checked by a program, and can be solved step by step without guessing.

Techniques and controls