Chessdoku vs ORDR

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.

ORDR is a logic puzzle you can play without reading a single word. A row of empty slots. A handful of shapes. Above them, a few rules — not sentences, pictures: this shape sits here, this one comes before that one, these two are never side by side. Exactly one order satisfies every rule. Drag the shapes into place and find it. Then ORDR tells you something no other puzzle does: which of your moves were deduced and which were guesses. Every placement is marked green when the rules already forced it, yellow when it was right but you could not yet have known, red when it broke a rule. The line you share shows the shape of your thinking and gives nothing away. ONE PUZZLE A DAY The same puzzle for everyone, every day, with a result you can share. A CAMPAIGN THAT TEACHES BY SHOWING Two hundred levels. Every new rule arrives in a level where it is the only unfamiliar thing, easy enough to solve by looking at it. Nothing is ever explained, because nothing needs to be. ENDLESS Pick a difficulty and play as long as you like. Every level is generated on your device and proved before it is shown: exactly one answer, and not one rule that could be taken away. DIFFICULTY YOU CAN TRUST A level's difficulty is measured, not guessed: it is how many rules you have to hold in your head at once. One is read-and-place. Four is a real think. NO WORDS, NO ACCOUNT, NO NETWORK Nine kinds of rule, all drawn. The same game in every language. No sign-in, no server, nothing collected, nothing to buy.