Logic Islands vs Chromata

Logic Islands is a world of handcrafted deduction puzzles, built by a mathematician and a neuroscientist for people who like a real problem. Not logic grids. Not another Sudoku clone. Not pattern-matching dressed up as a brain game. These are original deduction puzzles in the tradition of Raymond Smullyan's knights and knaves logical puzzles: islanders who can only tell the truth or only lie, and your job is to work out who is who from what they say. From there it gets stranger. You reason about what characters know, what they could have said, what the truth would have to be, and what questions you must ask. Every puzzle is made by hand by a mathematician who has spent over a decade inventing them. No AI, not now, not ever. Each one was tested on hundreds of real people and refined until it was exactly hard enough, the progression exactly right. All explanations are handwritten too. Ten islands, each with its own logic You begin on the island of truth-tellers and liars. Beyond it lie nine more, each with its own residents, its own rules, and its own way of bending the truth. Enter a gallery of deceit, weigh the reliability of up to eight witnesses to a single crime, and learn to ask the right questions of the right people, in the right order. The rules are taught through play, the difficulty climbs toward the genuinely mind-bending, and new islands keep arriving. A fresh trio every day Three new puzzles land each morning, separate from the island puzzles: a warmup, a challenge, and a master. Small enough to fit in a coffee break, but stimulating enough to stay with you all day. Keep your streak alive and climb the weekly and all-time leaderboards against everyone solving the same set. Help at every step, never just the answer Being stuck is part of it, but you are never stranded. Professor Logic gives a targeted nudge when you want one and a refresher on the idea in play. Once you solve a puzzle, he walks you through exactly why the answer holds. You come away understanding how to reason your way through even the most complicated problems. Real reasoning, in the shape of a game The skills here are the genuine article: the deductive reasoning used in mathematics and proof, relied on by anyone who has to think clearly under pressure, and tested on the LSAT and GRE. Propositional logic, knights and knaves, strategic questioning, reasoning about what others know, possibility and necessity, and more exotic logics. You'll learn to read AND, OR, XOR, IF-THEN, NOT, and a great deal more, as fluently as you read English. You will not feel like you are studying. You will just get sharper. Who it's for Puzzle solvers who have run out of things that truly challenge them. People who want more depth from their games. Anyone who loves paradoxes, proofs, or that satisfying moment when one detail forces every other piece into place. People who like a good argument and take pride in thinking things through. Mathematical, philosophical, and computing minds. Anyone preparing for the LSAT or GRE, or just looking to improve their logical reasoning skills. And anyone who misses the feeling of working something out entirely on their own, and wants to protect that. Logic Islands is free to download. You get the first island and your first five days of daily trios free, no account required, no ads. When you want the rest, Logic Islands Pro opens every island, every daily puzzle, and every island still to come, plus personal analytics. Think again. Questions, feedback: hello@logicislands.com Report a bug: support@logicislands.com. Press: press@logicislands.com. Subscriptions auto-renew unless cancelled at least 24 hours before the end of the period. Manage in your Apple ID settings. Restore Purchases is available in the profile settings. Terms of Use: https://logicislands.com/terms Privacy Policy: https://logicislands.com/privacy FOLLOW US: https://x.com/LogicIslandsApp

A code is deduced, never guessed. One secret code. Five colors. One certainty: everything can be deduced. Chromata is a solo logic deduction game. A code hides behind three, four or five colors, each carrying a value from 1 to 5. You don't guess it — you prove it. HOW IT PLAYS Each turn, three statements are offered to you — with no verdict attached. "Iris is greater than Cobalt." "The sum of Sulphur and Amber is less than 5." You pick one. Only then does the game reveal whether it is true or false. And that is the whole point: a false statement teaches you exactly as much as a true one. If "Iris > Cobalt" is false, then Iris ≤ Cobalt. There is no bad draw, no luck to suffer — only reasoning that is more or less efficient. Cross out impossible values on the grid, cross-reference, narrow it down. When one candidate is left, submit it. A BREAK MADE OF ATTENTION No endless feed, no autoplaying video, no banner blinking to keep you here. Chromata asks for the exact opposite of scrolling: a few minutes of continuous attention, a line of reasoning held from start to finish, and the very distinct satisfaction of having worked something out instead of having consumed it. A game lasts two to ten minutes. It plays in silence, offline, on a commute or in a quiet room. WHAT'S INSIDE • 3, 4 or 5-color codes — up to 3,125 possible combinations • Three difficulties, which change the nature of the clues served, not just their number • Eight families of statements: comparisons, sums, orderings, counts, positions, membership • A fully interactive elimination grid — your scratchpad, right on screen • Jokers, for when a game closes in on you • Divination mode: reroll a triplet of statements at the cost of points • Timed mode: reasoning under pressure, with a speed bonus under one minute • Full history: every game can be replayed, statement by statement, verdict by verdict • Seven ranks to climb, from Greyness to Divine Lagoon • English and French, interface and statements alike • No ads, no account, no data collection, no connection required FULL VERSION The game installs and plays for free: 3-color codes, easy and normal difficulty, unlimited games, tutorial included. A single purchase — never a subscription — unlocks 4 and 5-color codes, hard mode and timed mode.