r1bqkbr1/ppp2p1p/2npp1p1/5n2/7P/PPPPP1PB/R2K1P2/1NBQ2NR b q - 0 10
FEN state: r1bqkbr1/ppp2p1p/2npp1p1/5n2/7P/PPPPP1PB/R2K1P2/1NBQ2NR b q - 0 10 ; Best move: e6e5
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 c7, black pawn at f7 and black pawn at h7. Black knight at c6, black pawn at d6, black pawn at e6 and black pawn at g6. Black knight at f5. White pawn at h4. White pawn at a3, white pawn at b3, white pawn at c3, white pawn at d3, white pawn at e3, white pawn at g3 and white bishop at h3. White rook at a2, white king at d2 and white pawn at f2. White knight at b1, white bishop at c1, white queen at d1, 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.