ShakaShaka: Slant Logic Puzzle

Draw one diagonal. Such a small move, and somehow your mind goes quiet.

ShakaShaka is a solo slant logic puzzle guided by numbers. There are only three rules: draw a diagonal in every cell, make each corner number match how many diagonals touch that point, and never let the diagonals close a loop. That's all you need to know.

Behind those simple rules is a genuinely satisfying challenge. No guessing, ever. Follow the numbers and the no-loop rule and every board resolves by pure logic, with exactly one solution. It's the "of course!" moment, again and again.

HOW TO PLAY
- Tap a cell to cycle its diagonal
- A circled number on a grid corner is how many diagonals meet there
- Numbers turn indigo when satisfied; diagonals in a loop light up red
- Fill every cell, match every number, make no loops, and you're done

FEATURES
- Always exactly one solution, every board generated to be solvable by logic
- Four sizes: Easy 6x6, Medium 8x8, Hard 9x9, Expert 10x10
- Daily puzzle: the same board for everyone, every day
- Track your streak, puzzles solved and average time
- Hints, undo and clear when you need them
- Washi-paper look with indigo lines, plus Dark Mode
- English and Japanese

GREAT FOR
- Sudoku and Kakuro fans looking for something new
- Brain teasers on your commute or coffee break
- Winding down with something calm before bed
- Anyone who wants easy-to-learn rules with real depth

PRIVACY
- No account or sign-in
- Your records stay on your device
- Puzzles play offline
- To show our other apps, the app may load public App Store information. No personal data is sent