Matrix Brain Twister is a puzzle game, where you have to solve matrices by filling all blocks with the same color. If a block is clicked, the block itself and its horizontal and vertical neighbours ...

Lewis Carroll’s Game of Logic involves placing counters on a board to represent logical statements. The top half of the board is x and the bottom half is “not x”, denoted by x’. The left and right ...

Receive a weekly dose of discovery in your inbox. We'll also keep you up to date with New Scientist events and special offers. Download the app ...