As the sun broke the horizon I could feel the cold breeze on my face mixing with the warming city air. Like most mornings, I could hear Mr. and Mrs. Shamming discussing their afternoon plans during their daily jog. All the while, Mr. Punch (he got the nickname from fighting over card games) and Mr. Bim were trying to outplay each other in their daily chess matches.
I always enjoy watching them play so I sat at the nearby bench as usual, but I quickly noticed they were a bit grumpier than normal. "Pardon me, gentlemen, but what seems to be the issue?" I asked. Mr. Bim grunted, as was his standard reaction when ladies asked him questions. "It's a parody dear child.", Mr. Punch said softly. I stared at their chessboard as my mind melted into an enigmatic train of thought:
"You know Emma, if you stare much longer, I'm afraid the board may burst into flames and we won't be able to check the result of the game." said Mr. Punch. "You'd like that wouldn't ya, ya putz." snarled Mr. Bim.
After Mr. Punch broke my concentration I caught a brief glimpse of their scoresheets, and neither had recorded Mr. Bim's last move; unfortunately, I can only remember the last two recorded moves:
To further complicate matters, Mr. Punch is tightly clutching the piece from Mr. Bim's last move.
It would seem that Mr. Bim won the match this morning, but what was his final move? How does the state of the chessboard prove your answer?
These types of codes can also be seen as "self-correcting messages". The hidden message is broken and can be corrected to confirm Mr. Bim's last move was in fact the end of the game. Remove the parity bits and inspect what's left.
1: Note that the answer isn't as simple as identifying a valid play of checkmate. Instead, the entire chessboard is required to answer correctly. As such, additional tags include wordplay, computer-science, and knowledge.