Chess Crossword

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Across
  1. 1. ?
  2. 5. Rook vs bishop
  3. 8. The C in CM
  4. 9. The act of taking something lesser
  5. 10. A basic tactic
  6. 13. An example of the longest notation possible
  7. 14. e4 e5 Nf3 Nc6 Bb5
  8. 17. Checkmate delivered by a knight and the king is blocked by his own pieces
  9. 20. The best computer at chess
Down
  1. 2. No legal moves
  2. 3. A 3-point piece
  3. 4. A variation of the Sicilian as well as a chess engine
  4. 6. Two connected pawns that are isolated from others
  5. 7. The international chess federation
  6. 11. A GM in the 2022 candidates
  7. 12. The notation of a horse in Shogi
  8. 15. The master who performed the Opera Mate
  9. 16. A mating pattern with two bishops
  10. 18. Queenside castling
  11. 19. The country of the current world champion