5

After hours of tense calculations and troubleshooting, you and Wesley take a breather in one of the factory’s living rooms.

In the corner, Magnus Carolsen is entertaining a small crowd of elves with a simultaneous exhibition. He glances up as you enter, grinning. "Ah, just in time! Care for a game?" he asks, gesturing at the board.

Wesley waves him off. "No thanks, Carolsen. I’ve had my fill of chess puzzles for the day."

He chuckles and turns to you, saying, "But I do have a little chess problem for you. Care to try?"

The elves lean in as Carolsen sets up the position on the board. "It’s simple," he says. "White needs to add a pawn to the board and deliver mate in two moves."

White to add a White pawn and mate in 2. Note that this is not a helpmate, so White must be able to force a mate regardless of Black's response. First give the square at which to place the pawn, and then the sequence of moves leading to the mate in 2, with White starting and mating on White’s 2nd move.

Please give the answer as the square, then a comma, then the series of moves. Format example: "a2, 1. Qa3 Ka7 2. Qa8#". If anything is unclear, ask in our Discord.