rn2k2r/1b2bpn1/pp2p3/P1p1p1Np/1NP2PPP/8/RP1PQ3/2BK1B1R w q - 2 21
FEN state: rn2k2r/1b2bpn1/pp2p3/P1p1p1Np/1NP2PPP/8/RP1PQ3/2BK1B1R w q - 2 21 ; Best move: f1g2
The current state of the chess board is: Black rook at a8, black knight at b8, black king at e8 and black rook at h8. Black bishop at b7, black bishop at e7, black pawn at f7 and black knight at g7. Black pawn at a6, black pawn at b6 and black pawn at e6. White pawn at a5, black pawn at c5, black pawn at e5, white knight at g5 and black pawn at h5. White knight at b4, white pawn at c4, white pawn at f4, white pawn at g4 and white pawn at h4. White rook at a2, white pawn at b2, white pawn at d2 and white queen at e2. White bishop at c1, white king at d1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 2. Full move number is 21. White to move.