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You just replayed Mark Mueller vs Oleg Derr. On CipherChess, the same board opens up any game — check every move against the engine, prep the players you're about to face, and keep it all in one place that follows you everywhere.
See it for yourselfAbout this chess game
This chess game between Mark Mueller (1966) and Oleg Derr (2140) was played at Heusenstamm Schloss Open in 2025 and finished 0-1. The opening was the Sicilian Defense: Open (B32).
You can replay the full game move by move on the interactive board above, or open it on the CipherChess analysis board to study every move with the Stockfish engine.
Looking for more Mark Mueller games or Oleg Derr games? This Mark Mueller vs Oleg Derr encounter is one of millions of chess games indexed in the CipherChess mega database. Browse both players' full records, the openings they play most, and head-to-head results, then load any game onto the board to prepare your own lines against the Sicilian Defense: Open.
Frequently asked questions
Who won Mark Mueller vs Oleg Derr?
Mark Mueller vs Oleg Derr (2025) finished 0-1, a win for Oleg Derr.
What opening was played in Mark Mueller vs Oleg Derr?
The game opened with the Sicilian Defense: Open (ECO B32).
Can I replay this chess game move by move?
Yes. Use the interactive board on this page to step through every move of Mark Mueller vs Oleg Derr, or open it on the CipherChess analysis board to review it with the Stockfish engine.