Caissa Codex
C67

Ruy Lopez: Berlin Defense, Rio de Janeiro Variation trainer

Back to the opening, all openings to practise or my repertoire

Type a move and press Enter: e4, Nf3, O-O, or from and to squares like g1f3 (e7e8q to promote). The board is also played with the mouse.

Practise the Ruy Lopez: Berlin Defense, Rio de Janeiro Variation

Play Black's moves of the line from memory — 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 Nd6 7. Bxc6 bxc6 8. dxe5 Nb7 9. Nc3 O-O 10. Re1 Nc5 11. Nd4 Ne6 12. Be3 Nxd4 13. Bxd4 c5 — and the trainer plays White's replies; "Play the other side" turns it around.

Read about the line, its statistics on Lichess and Stockfish's evaluation on the Ruy Lopez: Berlin Defense, Rio de Janeiro Variation page, or pick another opening in the opening trainer.

https://chesscodex.org/train/ruy-lopez-berlin-defense-rio-de-janeiro-variation-2