r4bnr/pbkpp2p/nq6/1Pp2pp1/5P2/NP1P1N2/P3PKPP/1RBQ1B1R w - - 4 10
FEN state: r4bnr/pbkpp2p/nq6/1Pp2pp1/5P2/NP1P1N2/P3PKPP/1RBQ1B1R w - - 4 10 ; Best move: b5a6
The current state of the chess board is: Black rook at a8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black bishop at b7, black king at c7, black pawn at d7, black pawn at e7 and black pawn at h7. Black knight at a6 and black queen at b6. White pawn at b5, black pawn at c5, black pawn at f5 and black pawn at g5. White pawn at f4. White knight at a3, white pawn at b3, white pawn at d3 and white knight at f3. White pawn at a2, white pawn at e2, white king at f2, white pawn at g2 and white pawn at h2. White rook at b1, white bishop at c1, white queen at d1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 4. Full move number is 10. White to move.