Chessdoku vs Arrow Loop

Place the given chess pieces so every row and column holds exactly one piece — and no piece threatens another. That's Chessdoku: the discipline of Sudoku, the geometry of chess. NO GUESSING, EVER Every puzzle is generated by a built-in deduction engine and verified solvable by pure logic. Stuck? The hint doesn't just drop a piece — it explains the deduction you could have made. FIVE WAYS TO PLAY - Classic — open square boards, from a gentle 4×4 to the deep end - Panorama — wide boards that bend your instincts - Fortress — frozen pawn walls cut the lines, so extra pieces fit - Command — you place the pawns, and your pieces need them - Torus — borderless boards where attacks wrap around the edges 300 levels in each mode — 1,500 puzzles in all. EVERY DAY, ONE PUZZLE A daily challenge seeded from the date, identical for every player on Earth. Keep your streak alive and share your result, spoiler-free. THINK WITH YOUR HANDS Cross off dead squares with the X tool, pencil-mark individual piece options Sudoku-style, long-press any piece to see exactly what it attacks, and let the app prove it the moment a position becomes unwinnable. FREE TO PLAY The daily challenge, the tutorial, and a generous run of free levels — including the first 100 in Classic — are free to everyone. One optional purchase unlocks all 1,500 levels and every Quick Play preset — no subscription, ever. YOURS, OFFLINE No account. No ads. No tracking. Puzzles are generated on your device and your progress never leaves it. Seventeen handcrafted board themes, including a colorblind-friendly high-contrast set.

Sharpen your logic in quiet focus. One loop. A few shaded cells. That's the whole rule — and the longer you look at the board, the clearer your mind becomes. Use the arrow-and-number clues to shade exactly as many cells as each arrow points to, then draw a single closed loop through every remaining cell. Shaded cells never touch side by side, and clue cells are never shaded or crossed by the loop. WHAT YOU GET - A pencil logic puzzle in the Yajilin style: draw the loop, shade the cells - Every board has exactly one answer - Hand-picked boards you can solve by reasoning alone. No guessing required - Four levels from Easy (6x6) to Expert (12x12), graded by the depth of reasoning - Today's puzzle: one board for everyone, set by the date - Drag to draw the loop, tap to shade a cell - Leave a puzzle and continue right where you stopped - Ranks and titles that grow as you solve - Gentle help when you're stuck: mistake highlighting and hints - Six board themes: Indigo, Ink, Vermilion, Pine, Sakura and Night - Fully offline. No sign-up - English and Japanese, in a calm paper-and-ink style MADE FOR YOU IF - You want to turn a few spare minutes into quiet, focused thinking - You enjoy Slitherlink, Nurikabe, Sudoku or nonograms - You're tired of ambiguous puzzles and ad-heavy apps - You love the satisfying click of a single, certain answer - You'd like a small bedtime ritual with nothing chasing you PEACE OF MIND - Free to start. No subscriptions - No third-party ads - Your records stay on your device (no account needed) - The app shows small cards introducing other apps by the developer (TORANKIRITE). To build them, the app reads public App Store information; nothing about you is sent