PeerPuzzles
Kakurasu
Shade squares so every row and column adds up to its target.
A shaded square is worth its column number to its row, and its row number to its column.
Targets sit at the end of each row and column. They go grey when met, red when overshot.
Tap or drag to shade. Switch to Cross (or right-click) to mark squares you know are empty.
Every puzzle solves by logic alone. No guessing needed.
Progress can't be saved in this browser (private browsing, or site data blocked), so solved levels won't be ticked off.
Free play: a new random puzzle
To install: tap Share, then Add to Home Screen.