ZEBRA: Einstein's Riddle

Five houses in a row. Who keeps the zebra? ZEBRA takes Einstein's famous riddle and generates a fresh one every time — always exactly one answer, always reachable by logic alone. Read a clue, rule something out, and watch the last house fall into place. Also known as the Zebra Puzzle or Einstein's Riddle, this is the logic grid puzzle with a twist: you're not just matching pairs, you're working out the order. Left, right, next to, at the end. ◆ Exactly one answer, never a guess Every puzzle is checked by the built-in logic engine before you see it: one unique solution, reachable by deduction alone. Puzzles that fail either test are never shown. ◆ Deduce the order, not just the pairs • The ivory house is immediately to the left of the green house • Milk is drunk in the middle house • The Norwegian lives next to the blue house Combine clues like these to pin down the row, one house at a time. ◆ Features • Four sizes: 3, 4, 5 and 6 houses. Five is the size of the original riddle • The original Einstein zebra puzzle, included • A visual row of houses that fills in as you solve — roofs take their colour once you know it • A question for every puzzle, and houses that light up when you finish • Tap a clue to highlight the houses and cells it refers to; fully used clues dim automatically • Logic hints: the next square you can deduce, and the clue numbers that prove it • Daily Challenge: one shared puzzle for everyone, every day • Weekly Challenge: a new six-house puzzle every Monday • Past dailies: play any day you missed from the calendar • Ranks from Novice to Master Detective, plus nine badges • Auto-X, notes, undo, and continue where you left off • Themes: Classic, Forest, Street, Station, Harbor • Adjustable clue text size and dark mode • English, Japanese, German, French, Spanish, Portuguese, Italian, Korean and Traditional Chinese ◆ Grand Village (included with Premium) Rows of 7 and 8 houses and three new kinds of clue: somewhere between, not next to, and at one end of the row. Every puzzle here has exactly one answer, too. ◆ Perfect for • Anyone who has solved Einstein's riddle on paper and wants more • Players who want a different puzzle every time, not one classic recycled • Fans of logic grid puzzles, sudoku and brain teasers looking for something deeper • Players who'd rather learn how to think through a puzzle than be told the answer • A quiet, offline brain game for commutes and flights ◆ Peace of mind • No third-party ads • Your records stay on your device. No account, no sign-in • Puzzles are generated on your device, so you can play offline. To introduce the developer's other apps, ZEBRA may load public App Store information (no personal data is sent)