rnb1k2r/3p1p1p/2pb2pn/1p2p3/1p1B2P1/3P1PK1/P1P1P1B1/RNQ3q1 b q - 3 16
FEN state: rnb1k2r/3p1p1p/2pb2pn/1p2p3/1p1B2P1/3P1PK1/P1P1P1B1/RNQ3q1 b q - 3 16 ; Best move: e5d4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8 and black rook at h8. Black pawn at d7, black pawn at f7 and black pawn at h7. Black pawn at c6, black bishop at d6, black pawn at g6 and black knight at h6. Black pawn at b5 and black pawn at e5. Black pawn at b4, white bishop at d4 and white pawn at g4. White pawn at d3, white pawn at f3 and white king at g3. White pawn at a2, white pawn at c2, white pawn at e2 and white bishop at g2. White rook at a1, white knight at b1, white queen at c1 and black queen at g1. Black queenside is the only castle move available. Half move number is 3. Full move number is 16. Black to move.