r1b1kb2/ppqn2p1/1p5r/3ppp1p/P3n3/2PBPNPP/R2P1P1R/1NBQK3 b q - 2 16
FEN state: r1b1kb2/ppqn2p1/1p5r/3ppp1p/P3n3/2PBPNPP/R2P1P1R/1NBQK3 b q - 2 16 ; Best move: e4c5
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black bishop at f8. Black pawn at a7, black pawn at b7, black queen at c7, black knight at d7 and black pawn at g7. Black pawn at b6 and black rook at h6. Black pawn at d5, black pawn at e5, black pawn at f5 and black pawn at h5. White pawn at a4 and black knight at e4. White pawn at c3, white bishop at d3, white pawn at e3, white knight at f3, white pawn at g3 and white pawn at h3. White rook at a2, white pawn at d2, white pawn at f2 and white rook at h2. White knight at b1, white bishop at c1, white queen at d1 and white king at e1. Black queenside is the only castle move available. Half move number is 2. Full move number is 16. Black to move.