Hubbard
How to play Cross Sums
- Fill the white cells with 1 to 9.
- Each run of white cells must add up to its clue: the number top-right of a block is the across sum, bottom-left is the down sum.
- No digit repeats within a single run.
- A run that breaks the sum or repeats a digit turns red.
Your first useful move
Start with a short run and list the different digits that can make its total. Use the crossing run to remove candidates that cannot satisfy both sums.
Playing on HubbardGames
Open a Library board to find this game’s controls. The how-to-play button keeps the rules close by while you solve, so you can check a detail without leaving the puzzle.
Choose your difficulty
The Library shows the available difficulty levels for this game. Choose a board that suits you, then return for another when you want more practice.
Can I practise without affecting the league?
Yes. Choose a puzzle from the Library to practise this game. Library practice does not add league points. You can return to an unfinished puzzle later.
