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Battenburg Example.png Battenburg Example Solution.png

Place a given number of black and white circles in every row, column and thickly outlined region. Wherever two black and two white circles form a 2x2 checkerboard pattern, a Battenburg marking is given. Some circles are already placed.

(Rules (modified) and example (3 blacks and whites each) from WPC 2017 IB)

History of the puzzle[edit]

Battenburg Sudoku first appeared on Bram de Laat's (Netherlands) website in 2013 as a part of Daily League Sudoku series. This puzzle was developed as a practice material for the said puzzle. [1]

The name comes from Battenburg markings used for emergency services in the UK and other regions. [2]

Appearances in the past WPCs[edit]