Toehold: Sudoku Explained

By John Doan on AppTrack Ninja.

Every other sudoku app has a hint button. You get stuck, you tap it, it fills in a square, and you have learned nothing. Toehold does the opposite. A panel sits beside your board and keeps a live inventory of the techniques that are available right now — "Hidden single ×2 · Pointing pair ×1 · X-Wing ×1" — updating on every digit and every pencil mark. It tells you what to look for. It does not tell you where. Tap a technique and it shows you the cells that make it true, and one plain sentence explaining why: "The only spots for 6 in box 2 — r1c5 and r3c5 — share column 5, so 6 leaves r4c5 and…

Categories: Games, Casual, Board

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