Games

Step by step from flipping a card — colours, pairs, remembering. Finish and face the computer on a real board.

From pushing one tile to row-pushes and corner spins — the method that solves any board on your own.

Korean chess, played straight in the browser. Full rules, against the computer or against a friend anywhere.

9, 13 and 19 lines. Captures, suicide and ko all enforced. The computer plays games out to the end to pick its move.

Every piece caught between two of yours becomes yours. Near the end the computer reads the game right out to the last move.

Five in a row wins. Black alone is held back by the double-three and overline bans, which evens the game out. Banned points are marked with an ✕.

The bingo you played at school. A called number is crossed off on both boards at once — so it is not luck, it is what you choose to call.

The Korean stick game. Throw the four sticks and race your four pieces home. Captures, stacking and shortcuts included.

Only deals that have been played to the end and proven winnable. You can also ask whether the deal you are on is still alive.

Deal numbers match every other FreeCell. Deal 1 is deal 1 anywhere. Nothing is face down, so it is thinking rather than luck.

Build King down to Ace in one suit and clear eight runs. Winnable deals only.

Take pairs that add up to 13 and bring twenty-eight cards down. Winnable deals only.

Chain cards one rank up or down and clear all thirty-five. Every deal is worked out to the end before it is handed out.

Take down three peaks one rank at a time. The longer the chain runs, the harder the score climbs.

No stock pile — all fifty-two cards are on the table. Any face-up card moves with everything on top of it.

Match the suit or the rank. 2 and Ace make them draw, 7 changes the suit. The computer sees only its own hand.

Cards go down face-down and you only say what they are. When you have none, you have to lie. The computer works out when to call you.

No turns. Both players go at once. Whoever plays one rank up or down first takes the pile.

Turn two at a time and find the pairs. The computer only remembers what has actually been shown — and on easy it forgets more.

Whoever is not holding the odd card at the end wins. The trick is not hiding it — it is getting someone to take it.

Everything is laid out and you find it by eye. There is exactly one matching pair on every board.

Only puzzles with a single answer. Every time a digit is removed, the puzzle is re-checked to make sure the answer has not split in two.

Only puzzles that never need a guess — each one is solved line by line to the very end before it is handed out.

Only boards that never need a guess — each one is checked to the end using nothing but the deductions a person would make. You never die unfairly.

Pressing a square flips it and its neighbours. Turn every light off to win. Only boards that are certain to be solvable.

Slide tiles into the gap to put the numbers in order. Boards that cannot be solved are never handed out.

Sudoku with greater-than and less-than laid over it. Every board is solvable by reasoning alone, never by guessing.

One tent for every tree. The counts down the rows and columns are the clue. Only boards with a single answer.

Cut the whole board into rectangles, each as big as the number inside it. Only boards with a single answer.

Join the islands with bridges. Nothing may cross, and everything must end up connected. Only boards solvable by reasoning.

Trace every line exactly once without lifting the pen. Count the odd points and you can tell in advance whether a figure can be drawn at all.

Move in L shapes and land on every square exactly once. You only ever start from a square a full tour really exists from.

Work out the hidden number from strikes and balls alone. It is not a guessing game, it is a reasoning game.

Cars only slide forwards and backwards. Clear a path and get your car out of the exit on the right. It also tells you the fewest moves possible.

A falling-block puzzle. Three-square pieces for an easy game, twelve pentominoes for a hard one.