r1b2rk1/pp1pq1p1/2p1pp2/3nbP1p/3NP2N/1PP2RnP/P2P2P1/R1BQKB2 b Q - 3 18
FEN state: r1b2rk1/pp1pq1p1/2p1pp2/3nbP1p/3NP2N/1PP2RnP/P2P2P1/R1BQKB2 b Q - 3 18 ; Best move: g3e4
The current state of the chess board is: Black rook at a8, black bishop at c8, black rook at f8 and black king at g8. Black pawn at a7, black pawn at b7, black pawn at d7, black queen at e7 and black pawn at g7. Black pawn at c6, black pawn at e6 and black pawn at f6. Black knight at d5, black bishop at e5, white pawn at f5 and black pawn at h5. White knight at d4, white pawn at e4 and white knight at h4. White pawn at b3, white pawn at c3, white rook at f3, black knight at g3 and white pawn at h3. White pawn at a2, white pawn at d2 and white pawn at g2. White rook at a1, white bishop at c1, white queen at d1, white king at e1 and white bishop at f1. White queenside is the only castle move available. Half move number is 3. Full move number is 18. Black to move.