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This is an archived problem from a previous year. Submissions are closed, but you can view the problem and its solution.

1

Proof gameRetrograde

Welcome to a new year of Advent of Chess!

Starting from the initial position, give a sequence of moves that reaches this position in exactly 4 moves (4 moves for White and 4 moves for Black).

Write the answer using algebraic chess notation. See the paragraph on Chess Notation on the About page if you don't know how to write chess moves.

If you're confused about anything, join our Discord server.

You have until midnight CET to submit an answer!

Good luck!

First 10 to solve #1

Total number of solvers: 536