r1bqk1r1/2p1pp2/7b/p4p2/1Pp2P2/1n1PpP2/P2B4/RN2KBN1 w q - 0 21
FEN state: r1bqk1r1/2p1pp2/7b/p4p2/1Pp2P2/1n1PpP2/P2B4/RN2KBN1 w q - 0 21 ; Best move: g1h3
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at e8 and black rook at g8. Black pawn at c7, black pawn at e7 and black pawn at f7. Black bishop at h6. Black pawn at a5 and black pawn at f5. White pawn at b4, black pawn at c4 and white pawn at f4. Black knight at b3, white pawn at d3, black pawn at e3 and white pawn at f3. White pawn at a2 and white bishop at d2. White rook at a1, white knight at b1, white king at e1, white bishop at f1 and white knight at g1. Black queenside is the only castle move available. Half move number is 0. Full move number is 21. White to move.