1r1k2r1/pqp1bppp/1pn1p2n/P2pP1Q1/1P1P1Bb1/5N2/2P1BPPP/R3KNR1 b Q - 4 16
FEN state: 1r1k2r1/pqp1bppp/1pn1p2n/P2pP1Q1/1P1P1Bb1/5N2/2P1BPPP/R3KNR1 b Q - 4 16 ; Best move: c6b4
The current state of the chess board is: Black rook at b8, black king at d8 and black rook at g8. Black pawn at a7, black queen at b7, black pawn at c7, black bishop at e7, black pawn at f7, black pawn at g7 and black pawn at h7. Black pawn at b6, black knight at c6, black pawn at e6 and black knight at h6. White pawn at a5, black pawn at d5, white pawn at e5 and white queen at g5. White pawn at b4, white pawn at d4, white bishop at f4 and black bishop at g4. White knight at f3. White pawn at c2, white bishop at e2, white pawn at f2, white pawn at g2 and white pawn at h2. White rook at a1, white king at e1, white knight at f1 and white rook at g1. White queenside is the only castle move available. Half move number is 4. Full move number is 16. Black to move.