1Rule check
You have 14 tiles that look organized, but they do not match any complete line on the current NMJL card. Can you declare Mah Jongg?
2Rule check
You combine half of one card line with half of another card line, and the result has 14 tiles. Is that a legal win?
3Rule check
A line needs a Kong of 5 Bam. You have 5 Bam, 5 Crak, 5 Dot, and a Joker. Is that a Kong of 5 Bam?