r1b2k1r/p2p3p/nbp2np1/4qp2/P4p2/2BP2P1/1P1NB1QP/2R1K1NR w K - 8 20
FEN state: r1b2k1r/p2p3p/nbp2np1/4qp2/P4p2/2BP2P1/1P1NB1QP/2R1K1NR w K - 8 20 ; Best move: c3e5
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at f8 and black rook at h8. Black pawn at a7, black pawn at d7 and black pawn at h7. Black knight at a6, black bishop at b6, black pawn at c6, black knight at f6 and black pawn at g6. Black queen at e5 and black pawn at f5. White pawn at a4 and black pawn at f4. White bishop at c3, white pawn at d3 and white pawn at g3. White pawn at b2, white knight at d2, white bishop at e2, white queen at g2 and white pawn at h2. White rook at c1, white king at e1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 8. Full move number is 20. White to move.