r1bq4/p2pkppr/n6n/1Np3Np/1b2P1PP/P3PK2/1PP2P2/1RB1QBR1 w - - 3 16
FEN state: r1bq4/p2pkppr/n6n/1Np3Np/1b2P1PP/P3PK2/1PP2P2/1RB1QBR1 w - - 3 16 ; Best move: a3b4
The current state of the chess board is: Black rook at a8, black bishop at c8 and black queen at d8. Black pawn at a7, black pawn at d7, black king at e7, black pawn at f7, black pawn at g7 and black rook at h7. Black knight at a6 and black knight at h6. White knight at b5, black pawn at c5, white knight at g5 and black pawn at h5. Black bishop at b4, white pawn at e4, white pawn at g4 and white pawn at h4. White pawn at a3, white pawn at e3 and white king at f3. White pawn at b2, white pawn at c2 and white pawn at f2. White rook at b1, white bishop at c1, white queen at e1, white bishop at f1 and white rook at g1. Both players have exhausted their castles. Half move number is 3. Full move number is 16. White to move.