r1b1k2r/ppqnpp2/5b2/3p1n1p/2P3P1/2N1P2R/PPP2PB1/R1B1QKN1 b q - 4 16
FEN state: r1b1k2r/ppqnpp2/5b2/3p1n1p/2P3P1/2N1P2R/PPP2PB1/R1B1QKN1 b q - 4 16 ; Best move: h5g4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black rook at h8. Black pawn at a7, black pawn at b7, black queen at c7, black knight at d7, black pawn at e7 and black pawn at f7. Black bishop at f6. Black pawn at d5, black knight at f5 and black pawn at h5. White pawn at c4 and white pawn at g4. White knight at c3, white pawn at e3 and white rook at h3. White pawn at a2, white pawn at b2, white pawn at c2, white pawn at f2 and white bishop at g2. White rook at a1, white bishop at c1, white queen at e1, white king at f1 and white knight at g1. Black queenside is the only castle move available. Half move number is 4. Full move number is 16. Black to move.