Nob Yoshigahara Puzzle Design Competition - Wikipedia
MathsPoints.ie - So this a problem by Japanese puzzle maker Nob Yoshigahara that he called his masterpiece. The beauty of it is that he has come up with a puzzle that almost
How to solve Nob Yoshigahra's masterpiece puzzle? - YouTube
HIKIMI L Puzzle by Nob Yoshigahara One-sided packing puzzle