r1bqkbr1/pp2ppp1/2pp3p/1n2P2n/3P1P2/1B1Q4/PPP3PP/RNB2KNR b q - 0 10
FEN state: r1bqkbr1/pp2ppp1/2pp3p/1n2P2n/3P1P2/1B1Q4/PPP3PP/RNB2KNR b q - 0 10 ; Best move: d6e5
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at e8, black bishop at f8 and black rook at g8. Black pawn at a7, black pawn at b7, black pawn at e7, black pawn at f7 and black pawn at g7. Black pawn at c6, black pawn at d6 and black pawn at h6. Black knight at b5, white pawn at e5 and black knight at h5. White pawn at d4 and white pawn at f4. White bishop at b3 and white queen at d3. White pawn at a2, white pawn at b2, white pawn at c2, white pawn at g2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white king at f1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 10. Black to move.