Abaku

Arrange numbers instead of words in a crossword-style puzzle, creating intersecting equations with every move. Combine arithmetic operations, think ahead, and make clever use of premium spaces to score the most points.

Abaku is an elegant tile-placement game that blends the satisfaction of crossword puzzles with engaging mathematical strategy. First published in 2008, it has remained a favorite among puzzle enthusiasts and has also been played online continuously since 2009.