A certain arrangement of matches is given. In the diagram, move/remove a given number of matches so that it fulfils the given objectives (i.e. turn it into the biggest number possible, turn it into a valid equation, etc.).
History of the puzzle
This type is pretty old. A puzzle involving matchsticks appears in Sam Loyd's Cyclopedia of Puzzles, published in 1914.
Appearances in the past WPCs
- WPC 2016/Round 7 by Michal Forišek