- من
- Motoro Ohno
- ماذا
- 10 total number
- أين
- اليابان (Chiyoda)
- متى
The most Othello (reversi) boards memorised is 10, achieved by Motoro Ohno (Japan) in Chiyoda, Tokyo, Japan, on 31 October 2017.
After memorising 10 boards, Motoro Ohno took 42 minutes to replicate all of them correctly.