Let's face it; the weekend just won't arrive if we don't fly a new mentalfloss.com Brain Game Free-for-all Friday challenge up the proverbial flagpole. Enjoy!

Which letter of the alphabet is missing from the
following list, and what does the list represent?

B, ?, N, P, Q, R

Here is the ANSWER.

THE ANSWER:

The missing letter is K.

The list represents the written notation of the 6 different pieces in the game of chess:

B = bishop
K = king
N = knight
P = pawn
Q = queen
R = rook

Thanks for playing! Please join us in three days for a new Monday Math Square.