Circuitous, convoluted, complicated
6 different colours
54 square tiles
Many disparate positions

6 different colours
Only few can complete
Many disparate positions
I am one of them

Only few can complete
Invented many years ago
I am one of them
Still remains a mystery to most

Invented many years ago
54 square tiles
Still remains a mystery to most
Circuitous, convoluted, complicated