leading block

13 LETTERS · STARTS WITH L

leading block is a valid 13-letter word worth 22 points in Scrabble and 28 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

L1E1A1D2I1N1G2B3L1O1C3K5

1 + 1 + 1 + 2 + 1 + 1 + 2 + 0 + 3 + 1 + 1 + 3 + 5 =22 PTS

DOUBLE WORD → 44TRIPLE WORD → 66

MEANING

What does leading block mean?