Number Waffle

The board occupies a 7×7 grid, but nine intersections contain fixed clue circles instead of movable numbers. The 1–7 rule applies to the four complete seven-cell rows and four complete seven-cell columns. The shorter lines passing through circles are not separate seven-number sets. A green tile contains the right digit for that exact cell; grey tells you that the cell needs a different digit. Green numbers can still be moved, so protecting them is a strategy rather than a lock.

Each circle gives the sum of its two immediate neighbors along the arrows: left and right, or above and below. For example, a vertical clue of 9 with a known 2 above requires 7 below. The other row and column constraints must also fit. This makes Number Waffle a placement puzzle using addition, rather than an equation-entry game.

1. Start with Tutorial to learn one, two and three swaps, or choose Unlimited or Daily directly. No account is required.
2. Inspect the full rows and columns. List missing digits, then use green positions, grey exclusions and nearby sums to narrow each cell.
3. Tap or click one numbered tile, then a second tile anywhere on the board to exchange them. The tiles do not need to touch. Clue circles stay fixed.
4. A swap of different digits uses one move. Selecting the same tile or two copies of the same digit does not spend a move. Watch the updated colors before the next swap.
5. Restore all 40 tiles within the move budget. Completing the board on move 20 is still a win; reaching zero with misplaced tiles ends the round.

• Standard puzzles allow 20 swaps. All 32 boards in the current ZUZI pool have a verified unique solution and an exact minimum of 15 swaps.
• Unlimited lets you start another board without waiting for the next day. It cycles through the current pool; the number of rounds is not limited.
• Daily uses the same ZUZI board for everyone on a given UTC date and changes at 00:00 UTC. The v1 pool repeats after 32 days.
• A standard unassisted win earns one star per unused move: 15 swaps gives five stars; 16, 17, 18, 19 and 20 give four, three, two, one and zero.
• Hint reveals the target digit in one misplaced cell without swapping it or spending a move. There are up to three hints and three undos per round. Undo refunds the last swap; either aid caps the result at three stars.
• Progress, completed Daily results and settings are saved on this device when browser storage is available. A Daily replay is practice and does not replace the recorded result.

• Work on a nearly complete full line first. If only 3 and 6 are missing and one grey cell already shows 3, that cell must ultimately hold 6.
• Read a sum in its stated direction. A total of 3 restricts the neighboring pair to 1 and 2; use crossing lines to determine their order.
• Look for two misplaced tiles that belong in each other’s cells. One exchange can correct both, conserving your limited moves.
• Before using Hint or Undo, decide whether you want help or an unassisted five-star attempt. A revealed digit still has to be placed through a legal swap.

Tap / click two tiles

Select two different digits to swap anywhere on the board; tap the selected tile again to cancel.

Tab, arrow keys, Enter / Space

Tab into the board, navigate between number tiles with the arrows and select with Enter or Space. Escape cancels a selection.

Pause, Restart and New puzzle

Pause without spending moves. Restart the current board or choose another Unlimited board; confirm when discarding an unfinished round.