Grid Deduction
Place one of each symbol in every row and column using the clues marked on the grid.
The game opens here and keeps you on WapTRICK.
How to play Grid Deduction
Touch controls: Tap a palette symbol to choose it, then tap cells to place or clear that symbol. Undo and Clear cell sit under the grid and are at least 48 pixels tall.
Keyboard controls: Arrow keys or W A S D move the cell cursor, number keys 1 to 6 choose and place a symbol, Backspace or 0 clears the current cell, U undoes, P or Escape pauses, R restarts and M toggles sound.
Screen: This game works best in any orientation.
About Grid Deduction
Grid Deduction is a small latin-square puzzle. Each grid holds one of every symbol in every row and every column, and a handful of cells are already fixed as clues, marked with a gold corner. Nothing else is written down: the marked clues are the whole rule set, and the rest is deduction.
Five grids follow one another, from four by four up to six by six, with fewer clues as they grow. A symbol that repeats in its row or column costs one of five slips and is ringed in clay red so the clash is obvious on the board itself.
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