1nb2knr/r1bp1p2/8/1Pp1p1pp/1P2P3/3P3Q/P4PPP/1R2KBNR w K - 1 21
FEN state: 1nb2knr/r1bp1p2/8/1Pp1p1pp/1P2P3/3P3Q/P4PPP/1R2KBNR w K - 1 21 ; Best move: b4c5
The current state of the chess board is: Black knight at b8, black bishop at c8, black king at f8, black knight at g8 and black rook at h8. Black rook at a7, black bishop at c7, black pawn at d7 and black pawn at f7. White pawn at b5, black pawn at c5, black pawn at e5, black pawn at g5 and black pawn at h5. White pawn at b4 and white pawn at e4. White pawn at d3 and white queen at h3. White pawn at a2, white pawn at f2, white pawn at g2 and white pawn at h2. White rook at b1, 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 1. Full move number is 21. White to move.