r1bq1br1/2pk1pp1/npR4p/Pn2pN2/1p1pP3/B7/2PP1PPP/3QKBNR w K - 9 21
FEN state: r1bq1br1/2pk1pp1/npR4p/Pn2pN2/1p1pP3/B7/2PP1PPP/3QKBNR w K - 9 21 ; Best move: f1b5
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black bishop at f8 and black rook at g8. Black pawn at c7, black king at d7, black pawn at f7 and black pawn at g7. Black knight at a6, black pawn at b6, white rook at c6 and black pawn at h6. White pawn at a5, black knight at b5, black pawn at e5 and white knight at f5. Black pawn at b4, black pawn at d4 and white pawn at e4. White bishop at a3. White pawn at c2, white pawn at d2, white pawn at f2, white pawn at g2 and white pawn at h2. White queen at d1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 9. Full move number is 21. White to move.