Kakurel: Cross Sums

Every crossing adds up. Kakurel is an original, offline number crossword with 120 uniquely solvable boards. Fill each white run with different digits from 1 to 9 so it adds up to its diagonal clue. Underlined starter digits are printed anchors: use them in both crossing sums. A complete puzzle collection • Five volumes, from compact 7×7 boards to 11×11 Grand crossings. • The first four volumes are available immediately. Eight distinct clears earn the Grand volume; assisted clears count too. • Each board has been independently checked for a single solution with its printed digits. Tools for careful thinking • Ink and pencil entry, erase, Undo and Redo. • See the across and down combinations for your selected crossing. • Optional hints explain a narrowed digit or explicitly label a checked search continuation. • Check highlights impossible runs. Computed notes and hints mark an assisted attempt. • Practise distinct-digit sums in the Combination lab. Your own pace • Unfinished boards, notes, progress and preferences save on this device. • Keep your latest 80 clear records, with up to 2,000 recent entry and tool actions per attempt. • Share a named JSON record through your device's share sheet. This is a record export, not a backup or import. • Today's crossing selects a board from the included collection using the UTC date. • Optional active solving time, quiet original music and separate sound controls. • An adaptive tablet workspace places the grid beside crossing combinations and the keypad. One upfront purchase. No advertising, in-app purchases, subscriptions, accounts or analytics. English interface. Offline play; support and privacy links open your browser. Local progress is removed when you reset or uninstall.