rn2kbn1/pp2pppr/6bp/1p6/8/P1PPp2q/RQK1N2R/1NB2B2 w q - 0 20
FEN state: rn2kbn1/pp2pppr/6bp/1p6/8/P1PPp2q/RQK1N2R/1NB2B2 w q - 0 20 ; Best move: f1h3
The current state of the chess board is: Black rook at a8, black knight at b8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at a7, black pawn at b7, black pawn at e7, black pawn at f7, black pawn at g7 and black rook at h7. Black bishop at g6 and black pawn at h6. Black pawn at b5. White pawn at a3, white pawn at c3, white pawn at d3, black pawn at e3 and black queen at h3. White rook at a2, white queen at b2, white king at c2, white knight at e2 and white rook at h2. White knight at b1, white bishop at c1 and white bishop at f1. Black queenside is the only castle move available. Half move number is 0. Full move number is 20. White to move.