r1bq1b1r/pp1kpppp/2pp4/4n2n/4PB2/2PP2PN/PP3P1P/RNQ1KB1R b - - 0 10
FEN state: r1bq1b1r/pp1kpppp/2pp4/4n2n/4PB2/2PP2PN/PP3P1P/RNQ1KB1R b - - 0 10 ; Best move: h5f4
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black bishop at f8 and black rook at h8. Black pawn at a7, black pawn at b7, black king at d7, black pawn at e7, black pawn at f7, black pawn at g7 and black pawn at h7. Black pawn at c6 and black pawn at d6. Black knight at e5 and black knight at h5. White pawn at e4 and white bishop at f4. White pawn at c3, white pawn at d3, white pawn at g3 and white knight at h3. White pawn at a2, white pawn at b2, white pawn at f2 and white pawn at h2. White rook at a1, white knight at b1, white queen at c1, white king at e1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 10. Black to move.