rnb1kbnr/pp4pp/2p5/3ppp2/P4P1P/RQP5/1P1PPKB1/1NB3NR b - - 1 10
FEN state: rnb1kbnr/pp4pp/2p5/3ppp2/P4P1P/RQP5/1P1PPKB1/1NB3NR b - - 1 10 ; Best move: e5e4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at g7 and black pawn at h7. Black pawn at c6. Black pawn at d5, black pawn at e5 and black pawn at f5. White pawn at a4, white pawn at f4 and white pawn at h4. White rook at a3, white queen at b3 and white pawn at c3. White pawn at b2, white pawn at d2, white pawn at e2, white king at f2 and white bishop at g2. White knight at b1, white bishop at c1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 1. Full move number is 10. Black to move.