RU-ALLRUSSIAN 1987 Problem 4
Your opponent has chosen a 1 x 4 rectangle on a 7 x 7 board. At each move you are allowed to ask whether a particular square of the board belongs to his rectangle. How many questions do you need to be certain of identifying the rectangle. How many questions are needed for a 2 x 2 rectangle?
Dataset text NuminaMath olympiads. Quoted with source.
Solutions
No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.