rnb3nr/1ppp3p/4qk1b/p4pp1/2P5/PP1P1N1P/4PPP1/RNB1KBR1 b Q - 0 10
FEN state: rnb3nr/1ppp3p/4qk1b/p4pp1/2P5/PP1P1N1P/4PPP1/RNB1KBR1 b Q - 0 10 ; Best move: f6f7
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black knight at g8 and black rook at h8. Black pawn at b7, black pawn at c7, black pawn at d7 and black pawn at h7. Black queen at e6, black king at f6 and black bishop at h6. Black pawn at a5, black pawn at f5 and black pawn at g5. White pawn at c4. White pawn at a3, white pawn at b3, white pawn at d3, white knight at f3 and white pawn at h3. White pawn at e2, white pawn at f2 and white pawn at g2. White rook at a1, white knight at b1, white bishop at c1, white king at e1, white bishop at f1 and white rook at g1. White queenside is the only castle move available. Half move number is 0. Full move number is 10. Black to move.