Sumline - Kakuro Sum Puzzle

Sumline is a sum-arithmetic logic puzzle in the style of Kakuro.

Fill every white cell with a digit 1-9 so each run — a stretch of cells
running right or down from a clue — sums to exactly the number shown, with
no digit repeated within that run. Work the crossings between horizontal
and vertical runs, and the whole ledger balances out.

There is no guessing. Each puzzle has been checked by a real solver to
guarantee a single, logical filling — a path of pure deduction always
exists from the first cell to the last.

FEATURES
• 125 hand-verified puzzles across three ledgers
– Petty Cash (6×6), General Ledger (7×7), Full Audit (8×8)
• Guaranteed unique solution on every board — solvable by logic alone
• Simple tap-and-type controls: select a cell, enter its digit
• Live duplicate-digit detection within each run
• Earn up to three stars per puzzle for efficient solving
• Warm crimson-ledger visuals with gold clue numerals
• Calm ambient soundtrack and tactile feedback — both toggleable
• Fully offline. No ads, no accounts, no tracking. Progress stays on your
device.

Balance every run.