r4kn1/3bqp1r/p1p1p1p1/3p4/nP6/R1P1PP2/3PKNPP/1NB2B1R w - - 2 20
FEN state: r4kn1/3bqp1r/p1p1p1p1/3p4/nP6/R1P1PP2/3PKNPP/1NB2B1R w - - 2 20 ; Best move: a3a4
The current state of the chess board is: Black rook at a8, black king at f8 and black knight at g8. Black bishop at d7, black queen at e7, black pawn at f7 and black rook at h7. Black pawn at a6, black pawn at c6, black pawn at e6 and black pawn at g6. Black pawn at d5. Black knight at a4 and white pawn at b4. White rook at a3, white pawn at c3, white pawn at e3 and white pawn at f3. White pawn at d2, white king at e2, white knight at f2, white pawn at g2 and white pawn at h2. White knight at b1, white bishop at c1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 2. Full move number is 20. White to move.