PlockySmall games. Big fun.
All gamesPuzzle / Free browser game

Cross Sums

YOUR NEXT LITTLE OBSESSION

Make every run add up.

Free to play · Right here in your browser
A LITTLE FRIENDLY COMPETITION

Community leaderboard

Best fastest solves, shared by players. Lower is better.

Community submissions · unverified
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A LITTLE ABOUT THE GAME

Make every run add up.

Fill every white square with a digit from 1 to 9 so that each run of squares, across or down, adds up to the clue at its start, and no digit repeats within a run. It's the classic number crossword, also known as kakuro. Every puzzle has exactly one solution and can be solved by logic alone, no guessing. A Combinations strip lists the digit sets that make a run's sum, like a printed chart, and notes let you pencil in candidates. Small, medium and large grids each have a Plocky leaderboard for the fastest solves.

The classic number crosswordSmall, medium and large gridsEvery puzzle solvable by logicFastest-solve leaderboardsNotes, undo and a combinations chart

Progress and preferences stay in this browser. Opening the game in another browser or device starts fresh.

How to play

Click / tap
Pick a square, then a digit
Arrows, 1–9
Move and fill by keyboard
Backspace, 0
Clear the square
N
Notes on or off
U, Ctrl+Z
Undo

Tap a square, then a digit on the keypad below the grid.

UP FOR SOMETHING DIFFERENT?Calcudoku