Puzzle 14 (APP5) Solution

Some of these chess configurations are impossible.

Impossible: A, C, D, E, F, L, M, O Possible: B, G, H, I, J, K, N, P By marking the letters in the 2x3 grids corresponding to impossible configurations, Braille letters are revealed.

The message is "Ogletree School Trail".

Picture key to the chess configurations