rnb1k3/ppp1p3/4qbp1/B2n1p1r/1P1Pp1Pp/P1Q4N/2P2PBP/RN2K1R1 b Q - 10 20
FEN state: rnb1k3/ppp1p3/4qbp1/B2n1p1r/1P1Pp1Pp/P1Q4N/2P2PBP/RN2K1R1 b Q - 10 20 ; Best move: f5g4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8 and black king at e8. Black pawn at a7, black pawn at b7, black pawn at c7 and black pawn at e7. Black queen at e6, black bishop at f6 and black pawn at g6. White bishop at a5, black knight at d5, black pawn at f5 and black rook at h5. White pawn at b4, white pawn at d4, black pawn at e4, white pawn at g4 and black pawn at h4. White pawn at a3, white queen at c3 and white knight at h3. White pawn at c2, white pawn at f2, white bishop at g2 and white pawn at h2. White rook at a1, white knight at b1, white king at e1 and white rook at g1. White queenside is the only castle move available. Half move number is 10. Full move number is 20. Black to move.