Boo! vs Takuzu

'Boo!' is a spooky puzzle game for you! To solve the puzzles you have to dip the pumpkin in the different paints and wear attributes to mask certain parts of the pumpkin. The puzzles start easy but it gets more difficult! Can you make the correct pumpkin in 42 Halloween themed levels? Complete all the levels to unlock the brand new daily puzzle mode. Happy Halloween, @BartBonte

Binary logic, graded by the technique each board actually needs. Fill a grid with two symbols under three rules: never three of the same symbol in a row, an equal count of each per line, and no two identical rows or columns. Tap a cell to cycle it. That is the whole game. DIFFICULTY THAT MEANS SOMETHING Boards are labelled by the DEEPEST solving technique they genuinely require — Dawn, Day, Dusk and Night — computed by the same deterministic solver that proves each board has exactly one solution. Dawn, Day and Dusk are solvable by pure forward deduction: no hypotheticals, no guessing. Night asks for exactly one bounded "what-if" chain that resolves in a few steps, never open-ended trial and error. We say that precisely rather than promising a "never guess" that a hard board would contradict. WHY YOU'LL STAY • One puzzle a day, byte-identical worldwide, with no server • Streaks, and a fully reconstructible free archive • Several sizes, from a quick grid to a long sit-down • Hints reveal the next forced cell, never the answer MADE TO BE COMFORTABLE • The two symbols always differ in SHAPE, not just colour, at every cell size • A colorblind-safe palette and a fully accessible input path • Play in English, German, Arabic, Persian or Kurdish (Sorani) • Proper right-to-left layout and localized numerals • Fully offline. No account, no sign-up FREE, HONESTLY The daily, the archive, streaks and stats are free with light optional ads. Rewarded video is opt-in and only ever buys a hint. No banner ads on the board, ever. One purchase removes all ads and lifts the hint cap — no subscription.