RU-ALLRUSSIAN 1991 Problem 12
- Answer
The figure below is cut along the lines into polygons (which need not be convex). No polygon contains a 2 x 2 square. What is the smallest possible number of polygons?

Answer 12
Dataset text NuminaMath olympiads. Quoted with source.
Show the answer
12
Solutions
No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.