grid variation

14 LETTERS · STARTS WITH G

grid variation is a valid 14-letter word worth 18 points in Scrabble and 21 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

G2R1I1D2V4A1R1I1A1T1I1O1N1

2 + 1 + 1 + 2 + 0 + 4 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =18 PTS

DOUBLE WORD → 36TRIPLE WORD → 54

MEANING

What does grid variation mean?