r1b2b1r/pp2pk1p/n2q2p1/2pp1P2/1P4n1/P1P4N/B2P1P1P/RNBQK1R1 b Q - 1 10
FEN state: r1b2b1r/pp2pk1p/n2q2p1/2pp1P2/1P4n1/P1P4N/B2P1P1P/RNBQK1R1 b Q - 1 10 ; Best move: d6e5
The current state of the chess board is: Black rook at a8, black bishop at c8, black bishop at f8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at e7, black king at f7 and black pawn at h7. Black knight at a6, black queen at d6 and black pawn at g6. Black pawn at c5, black pawn at d5 and white pawn at f5. White pawn at b4 and black knight at g4. White pawn at a3, white pawn at c3 and white knight at h3. White bishop at a2, white pawn at d2, white pawn at f2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white queen at d1, white king at e1 and white rook at g1. White queenside is the only castle move available. Half move number is 1. Full move number is 10. Black to move.