rnb2bn1/pp1ppk1r/2p3p1/5p2/q1PPP2p/1P3K2/P3QPPP/R1B2BNR w - - 0 10
FEN state: rnb2bn1/pp1ppk1r/2p3p1/5p2/q1PPP2p/1P3K2/P3QPPP/R1B2BNR w - - 0 10 ; Best move: b3a4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black bishop at f8 and black knight at g8. Black pawn at a7, black pawn at b7, black pawn at d7, black pawn at e7, black king at f7 and black rook at h7. Black pawn at c6 and black pawn at g6. Black pawn at f5. Black queen at a4, white pawn at c4, white pawn at d4, white pawn at e4 and black pawn at h4. White pawn at b3 and white king at f3. White pawn at a2, white queen at e2, white pawn at f2, white pawn at g2 and white pawn at h2. White rook at a1, white bishop at c1, white bishop at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 10. White to move.