XceL Checkerboard Puzzle No. 1

Doyle Puzzle Co., Buffalo, NY, circa 1920?
(cardboard box 5.1"x5.1"x7/8", and 14 distinct cardboard pieces with 3/4" squares;
same as the Famous and Baffling Checkerboard Puzzle with colors reversed;
also made in a 13 piece version, the New XceL Checkerboard Puzzle No. 2;
shown on pages 183-187 of the Haubrich book,
which lists this puzzle as having 84 solutions, one of which is shown below)

Note: The Chequers Puzzle shown on page 97 of the 1893 Hoffmann Book is the same as a mirror image of this puzzle, except that puzzle shows only 63 squares, and can be corrected to make one of the three 4-unit L's be a 5-unit Z.