sum1337

Delete numbers until their sums match the ends of the rows and columns.

Here's the (with negatives!) game for today, [date] (UTC):

🎉 Congrats, you won! 🎉

A knockoff of Sumplete, which is itself an unknowing knockoff of Summer, Rullo, Kakuro, and (originally?) Cross Sums. Some differences:

• Just one game every day, for everyone (like Wordle).
• Much less likely to give you a game that has to be solved with guessing.
• Keyboard-accessible!
• Undo/redo
• Auto-fill

Keyboard controls:

• Arrow keys move around the board. (Or use the hjkl keys if you're into that.)
• Space changes the cell from unmarked, to delete, to keep, and back again. Or, use x and o to mark cells directly as delete or keep (or unmark them again).
• z for undo, y for redo
• Autofill: If the sum in a row has been met, press r to mark all unmarked cells in the row as "keep". Use c to do the same for columns. (You can also use f to fill all rows and columns, but only when negative numbers aren't enabled, since autofill can't work properly if there are negatives.)

Missing features:

• Autofill for X, not just O
• Autosave (but then also a restart button)
• Save most recent settings as defaults for future games
• Disclose errors automatically if someone is way off course (but not right away)

Source code:

• sum1337 itself, by Tim McCormack
• cyrb53 hash function, used to turn today's date into a puzzle seed
• mersenne-twister.js random number generator, used to turn the seed into a puzzle