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Logic game

Shape Sudoku

Every row, every column and every thick box needs each shape exactly once. Look carefully, find the missing shape and fill the board!

  • Ages 5–10
  • Logic
  • Rules
  • Checking

Your puzzle

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Shape Sudoku 4×4 Easy

Draw the missing shapes. Each row, column and thick box has every shape once.

  • Circle
  • Square
  • Triangle
  • Diamond
  • Star
  • Heart

Keyboard: arrow keys move, number keys 1 to 4 place a shape, Backspace erases.

Pick a shape

Tap an empty square, then pick a shape.

How to play

  1. One of each. Each row, column and thick-lined box needs every shape exactly once.
  2. Tap, then pick. Tap an empty square, then a shape. Or pick a shape first and tap every square where it belongs.
  3. Need help? Check shows shapes that clash. Hint fills one square for you.
This row already has a circle, a square and a triangle, so the empty square needs the diamond.