Shoal Ledger

Shoal Ledger is an offline logic puzzle on a snow covered lake grid. Each board prints its clues first: sounding holes count the fish around them, and margin plates total each row and column. You never uncover a cell. Tap a cell to flag a hidden fish, tap again to sweep it clear, and long press for a pencil note. Press Haul to check the whole board at once. Every board comes from a fixed seed and is proved solvable by reasoning alone, so no board needs a guess. Later lakes add pairs of fish that never touch. Six lakes hold twelve boards each, from 5x5 up to 9x9. A clean haul pays three tongs marks, marks unlock the next lake, and a daily board keeps a streak going. Browse the Shoal Chart to pick a board and open the Rule Slate to reread each inference card with its worked example. Everything works offline with no account. Your progress, marks, pencil notes and settings stay only on your device, so Shoal Ledger plays the same with the connection off.