6

Back at your local North Pole pub, after your game with the mirroring elf, you're ready for a new challenge. This time, you're facing Wesley Snow, another one of Santa's elves. As you set up the chessboard, Snow remarks, "I'm not into mirroring moves like my friend. Let's try something where we work together."

He arranges a position on the board and explains, "From this setup, you'll make three consecutive moves as Black. Then, it's my turn as White to deliver a checkmate in just one move. Remember, this challenge is all about teamwork."

Recalling how a hasty Bishop move yesterday led to an unnecessarily missed point, you remind yourself to take your time today. You also remember to join Offerspill's Discord channel if you need any clarifications, ensuring you don't repeat the same mistake. After your third move, having made the perfect setup, Snow leans in, ready to deliver the final blow.

In short: Black plays 3 consecutive moves, without reply from White, after which White mates in one!

How? Give the whole series of moves. Here's the position on Lichess.

PS: Pay attention to the board rotation. You're seeing the board from White's side. Also, no intermediate checks are allowed, meaning that Black can only check on the 3rd move.