Today's puzzles

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New puzzles every midnight (New York time) · Every puzzle has exactly one solution.

How to play

Fill every square with 0 or 1.
No more than two of the same digit next to each other in a row or column (no 000 or 111).
Each row and column has as many 0s as 1s.
No two rows are the same, and no two columns are the same.

Tap a square to cycle: empty → 0 → 1 → empty. Keyboard: arrows to move, 0/1 to fill, Backspace to clear.

Fill white squares with digits 1–9.
The number above a diagonal is the sum of the squares to its right; the number below is the sum of the squares beneath it.
No digit repeats within one sum.

Tap a square, then a number on the pad (or type 1–9).

Every puzzle has exactly one solution and needs no guessing.
Everyone gets the same puzzles. New ones at midnight, New York time.
“Show mistakes” marks wrong squares in red. Your result card will note that you used it.
Your progress, streaks and settings stay on this device only.

Stored only in this browser. Streaks count puzzles solved on their own day.

This clears your entries. The timer keeps running.