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See it for yourselfAbout this chess game
This chess game between Rion Okuno (2069) and Toma Matsunaga (2002) was played at Japan Open 2025 in 2025 and finished 1-0. The opening was the Sicilian Defense: O'Kelly Variation (B28).
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 Rion Okuno games or Toma Matsunaga games? This Rion Okuno vs Toma Matsunaga 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: O'Kelly Variation.
Frequently asked questions
Who won Rion Okuno vs Toma Matsunaga?
Rion Okuno vs Toma Matsunaga (2025) finished 1-0, a win for Rion Okuno.
What opening was played in Rion Okuno vs Toma Matsunaga?
The game opened with the Sicilian Defense: O'Kelly Variation (ECO B28).
Can I replay this chess game move by move?
Yes. Use the interactive board on this page to step through every move of Rion Okuno vs Toma Matsunaga, or open it on the CipherChess analysis board to review it with the Stockfish engine.