Goishi: Black & White Puzzle

About

Connect black and white, each in one unbroken group. Goishi is a logic puzzle where you shade every cell of the board black or white. No guessing needed: every board is built to be solved by pure deduction. THREE SIMPLE RULES • Shade every cell black or white • All black cells connect; all white cells connect • No 2×2 square may be a single color Every puzzle has exactly one solution, reached by reasoning, not luck. FEATURES • Hints that explain why: see the next forced cell and the reason (the 2×2 rule, connectivity, or look-ahead). A wrong stone is pointed out and removed • Logic-only puzzles: every board is checked to be solvable without guessing • Four levels: Easy (6×6), Medium (8×8), Hard (10×10), Expert (12×12). Hard and Expert test your look-ahead • Daily Puzzle: one puzzle per date, with a day streak • Ranks: climb from 10 Kyu to 9 Dan. Harder boards raise your rank faster • Resume: unfinished boards are saved automatically • Stats: puzzles solved, day streak, no-hint rate, total time, best and average times by level • Board themes: Washi, Kaya and Sumi • Drag to shade several cells, with optional highlighting of 2×2 rule breaks GREAT FOR • Fans of Nurikabe, Sudoku and other pencil puzzles • Anyone looking for a brain teaser without numbers • Players who prefer a calm, focused game to flashy effects • A daily habit before bed or on the commute PRIVACY • No account needed • Your records stay on your device • No tracking • Puzzles play fully offline Note: the app reads public App Store information to show our other apps.