Sum Cross
Classic kakuro, made friendly: fill each run with different digits that add up to its clue. A built-in combination helper shows which digit sets can fit, across 30 hand-checked puzzles plus a daily challenge.
Play nowHow to play
Controls
TapKeyboard←→↑↓ N H- Tap a cell, then a number.
- Each run must add up to its clue with no repeats.
- Keys: arrows, 1-9, N notes, H hint.
About the game
Sum Cross is classic kakuro with a friendly helper. The grid is made of white runs, each with a clue that tells you what the digits in it must add up to. Fill every white cell with a digit from 1 to 9 so that each run reaches its total, and never repeat a digit inside the same run. Every puzzle has exactly one answer, reachable by logic.
Tap a white cell and the helper below the board lists every set of digits that could fill its runs, crossing out the sets that no longer fit with what you have already placed. That turns the usual memorised sum tables into something you can see at a glance. Notes mode lets you pencil in candidates, and a hint fills in one correct digit. There are thirty levels from small 4x4 grids up to 7x7, plus a daily puzzle with a streak.
Free to play in your browser. No download, no sign-up. Works on phones, tablets and computers. Your progress is saved on this device.