Common Letters

From WPC unofficial wiki

Place each word into a different box such that the number between two boxes indicates the number of letters those words have in common. Duplicate letters are counted separately.

(Rules from WPC 2017 IB, example from WPC 2004 IB)

History of the puzzle[edit]

Most likely first appeared on WPC 2001. Which round it did appear nor by whom was it written is unknown. [1]

Appearances in the past WPCs[edit]

References[edit]