A mouse hides in a ring of holes and moves to a neighbouring hole every night. Each day you open two holes. How quickly can you be sure to catch it?
Tap two holes to open them. On a keyboard, type the hole number. Press R to restart a level.
Inspired by the classic "13 Caves and a Thief" brain teaser, a puzzle known from Google job interviews: a thief hides in one of thirteen caves in a circle and moves to a neighbouring cave every night, two police officers search two caves a day. The mouse here is that thief, in every cave at once. Thanks to @piratecodeofficial, whose reel about the puzzle started this. The maths behind it.