The 12 values are 88, 64, 48, 32, 24, 16, 12, 8, 6, 4, 2 and 1. Top patterns include Big Four Winds, Big Three Dragons, All Green, Nine Gates, Four Kongs, Seven Shifted Pairs and Thirteen Orphans.
MCR applies non-duplication principles: a lower pattern that is inevitably contained in a higher one may not be counted again. Beginners should first learn the 8-point threshold and common patterns before tackling all 81.
Read the hand
Identify its main patterns and win method.
Remove duplicates
Apply the non-duplication principles.
Add the points
The eligible total must reach at least 8.