'Two Brains' is a weekly column in The London Times newspaper which challenges readers to pit their wits in a test of IQ, logic and imagination. Many readers have contacted The Times to point out that this column is the item which they first go to on receiving their weekend paper. The column has not just been responsible for stretching the neuronal capacity of readers but has also provided a remarkably popular forum for devotees of The Times to write in with their own brainteasers. In this book, the best of the weekly puzzles have been gathered together.

The Times Two Brains provides the ideal equipment for your daily mental workout.

Ray Keene is a chess grandmaster, former British champion and is chess correspondent of The Times.

Byron Jacobs is an experienced author and journalist and has written extensively on chess, related board games and puzzles.