rqb1r3/2pp2pk/7b/pp2p2p/2P2QpP/1P1P1PR1/P2BP3/RN2KBN1 b Q - 1 20
FEN state: rqb1r3/2pp2pk/7b/pp2p2p/2P2QpP/1P1P1PR1/P2BP3/RN2KBN1 b Q - 1 20 ; Best move: e5f4
The current state of the chess board is: Black rook at a8, black queen at b8, black bishop at c8 and black rook at e8. Black pawn at c7, black pawn at d7, black pawn at g7 and black king at h7. Black bishop at h6. Black pawn at a5, black pawn at b5, black pawn at e5 and black pawn at h5. White pawn at c4, white queen at f4, black pawn at g4 and white pawn at h4. White pawn at b3, white pawn at d3, white pawn at f3 and white rook at g3. White pawn at a2, white bishop at d2 and white pawn at e2. White rook at a1, white knight at b1, white king at e1, white bishop at f1 and white knight at g1. White queenside is the only castle move available. Half move number is 1. Full move number is 20. Black to move.