The word chessboards is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 20
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (20 words)
abscess, adsorbs, barcode, bashers, brassed, brasses, brocade, cashers, chaoses, chasers, crashed, crashes, crossed, crosses, dashers, decarbs, roached, roaches, sarcode, shaders