Small puzzles.
Better moves.
Find your next five-minute challenge. Play at your own pace, or learn a new way to solve it.
A place for
every piece.
Meet Tile Shift. A familiar puzzle with room to think.
Play Tile Shift ↗Learn Rectangle Rooms, one idea at a time.
Start with the rules, try the same board, then work toward an independent challenge. Each lesson has its own worked example.
- 1Beginner rules ↗
Learn how opposite corners define a room, practise a refused placement, and divide one checked four-by-four board into four rectangles with a complete area ledger.
- 2Solving strategy ↗
Compare nine candidate rectangles, reproduce two locally legal dead ends, and use a blank corner cell to force the right room on a different checked board.
- 3Practice challenge ↗
Try a new five-room challenge with no initial single candidate. Find the cells shared by two possible sixes, then check a complete solution and a reversible wrong assumption.
What feels fun today?
A little logic, a little memory, a little “one more try.”
Tile Shift
Slide the numbers into place, one thoughtful move at a time.
Memory Match
Find eight matching pairs in a quiet game of observation.
Light Switch
Untangle a grid where every move changes more than one light.
Number Merge
Combine equal numbers and work your way toward a 2048 tile.
Line Three
Play a compact strategy classic against a careful opponent.
Sum Select
Pick numbers that add up to the target in ten untimed rounds.
Clue Grid
Use row and column clues to deduce a five-by-five filled pattern.
Bridge Links
Join numbered islands with single or double bridges, without crossings.
Loop Trace
Draw a single loop on grid edges while matching every numbered cell.
Rectangle Rooms
Partition a numbered grid into nonoverlapping rectangular rooms, each with one matching area clue.
A good move starts with an idea.
Rectangle Rooms practice: find shared cells before choosing a room.
Try a new five-room challenge with no initial single candidate. Find the cells shared by two possible sixes, then check a complete solution and a reversible wrong assumption.
Lesson 2Solving strategyRectangle Rooms strategy: check the candidates, then the uncovered cells.
Compare nine candidate rectangles, reproduce two locally legal dead ends, and use a blank corner cell to force the right room on a different checked board.
Lesson 1Beginner rulesRectangle Rooms for beginners: one number, one matching area.
Learn how opposite corners define a room, practise a refused placement, and divide one checked four-by-four board into four rectangles with a complete area ledger.
Take your time.
That’s part of the fun.
Our puzzles have no countdowns, entry fees, or public leaderboards. Try a move, notice what changes, and make the next one a little more deliberate. The guides explain the rules and the reasoning, with examples you can try for yourself.