Kire: Brain Puzzle Games

Can a puzzle be relaxing and ruthless at the same time?

Welcome to Kire — a pure logic puzzle that takes the satisfying deduction of Sudoku, the clean grid of a block puzzle, and the one-a-day ritual of your favourite word game, and cuts them into something sharper.

Your mission is simple: cut the grid into perfect boxes.

💡 Simple Rules, Deep Strategy
The rule of this rectangle puzzle fits in one line. Mastering it does not.
• Every number owns one rectangle — of exactly that many squares.
• Fill the whole grid. No gaps. No overlaps.
• That's it. Now find the only arrangement that works.

Shikaku is the classic Japanese rectangle-splitting logic puzzle, and Kire is Shikaku rebuilt for your phone: bigger grids, a real difficulty ladder, and a daily brain puzzle everybody plays together.

🧠 Never Guess Again
Every single board in Kire is certified to have exactly one solution, reachable by pure logic. No trial and error. No "I got stuck, is this puzzle even valid?" If you are stuck, there is always a next deduction waiting — and Kire will prove it to you. Most grid puzzle games let a broken board waste your evening. This one cannot.

🔢 How To Play
Tap and drag to cut a rectangle out of the grid. Each numbered square must end up inside a rectangle holding exactly that many cells — a 6 owns six squares, a 2 owns two. Every cell belongs to exactly one rectangle when the logic puzzle is done. It takes ten seconds to learn and a long time to master, which is what a good brain teaser is supposed to do.

⛰️ An Infinite Mountain to Climb
• 420 hand-graded pitches across 7 chapters, from gentle 6×6 to brutal 12×12.
• Beyond the last chapter, the mountain never ends.
• Earn medals, master chapters, and reveal a hidden picture at every summit.
• Climb the global leaderboard and see exactly where you rank.
• Every grid is a fresh logic puzzle — never the same board twice.

📅 One Daily Puzzle. The Whole World. Same Board.
Everyone gets the identical daily puzzle each day. Build your streak, protect it with streak freezes when life gets in the way, and share a spoiler-free result card that brags about your time without ruining anyone's morning. If you already play a daily word game with your coffee, this is the daily brain game for the other half of your morning. The Daily is permanently ad-free and completely free. Always.

⚡ Race Your Friends in One Tap
Beat a board, then fire off a "beat my time" link. Your friend plays your exact puzzle instantly in their browser — no install, no account, no excuses. Every board has a par time and a live pace bar, so you always know if you're flying or crawling.

🐣 Raise Your Climbing Companion
A small creature hatches at your basecamp and grows with every summit you reach. Name it. Dress it. Watch it react to your best solves. It never asks you for anything — it just climbs with you.

❤️ Why Kire Will Stay on Your Phone
Kire will not hijack your attention. There are no countdown timers, no fake sales, no lives to wait for, and nothing competitive is ever for sale — every star and every place on the leaderboard is earned by solving. Rewarded ads are always your choice to watch, the full ad schedule is printed in Settings where you can read it, and a single purchase removes ads forever. Play the entire mountain offline, with no account, on a plane, in a tunnel, anywhere. It is a brain training habit that respects your time and your attention.

Kire (切れ) means "to cut." One grid. Cut perfectly. Once a day.

Perfect for fans of Shikaku, sudoku, nonogram and picross, kakuro, minesweeper, block puzzles, logic grid puzzles, rectangle puzzles, number puzzles, brain training apps, and daily brain teasers. If you like puzzle games that reward patience and punish nothing, Kire belongs on your home screen.

Download Kire now, make the first cut, and find out how far up the mountain you can get.