Determine which shape should replace the question mark!

Difficulty
Grid Size
00:00 Accuracy: — Avg. time: —

A little space to think.

Find the shape that belongs in the ? cell. Every row and every column must contain each shape exactly once.

  1. Look at the shapes already on the board.
  2. Pick a shape below, or press its number key. Click or tap a cell to place it. If the cell already has that shape, it clears; a different shape is replaced. Right-click also erases one cell. The eraser button clears all of your shapes at once, keeping clues and revealed hints. Your chosen shape stays selected.
  3. Use the arrow keys to move the cell outline. Press Space to place your chosen shape, or remove it if that same shape is already there. Use other empty cells as your scratchpad. Game-provided clues cannot be changed.
  4. A wrong answer shows Incorrect! Try again or move to the next puzzle. The question mark stays empty so you can retry. A correct answer highlights the cell green, locks the board, and shows Correct! Click the arrow for a new puzzle. Press the arrow when you’re ready to continue. Each puzzle counts once toward accuracy: a correct first guess scores 100%; the first wrong guess fixes the score at 0%. Further mistakes add no penalty, and solving after a mistake gives no accuracy reward.

Need a hand? The light bulb reveals a supporting shape.

1–5 pick a shape↑↓←→ moveSpace place / remove⌫ eraseEnter next puzzleH hintN new puzzle

A fresh start?

This will clear your accuracy and average time and start a new puzzle.