1r1qkbn1/pbp1pn2/3p4/Bp3p1r/P4p1p/RPPP3P/3KP1P1/1NQ2BNR w - - 4 16
FEN state: 1r1qkbn1/pbp1pn2/3p4/Bp3p1r/P4p1p/RPPP3P/3KP1P1/1NQ2BNR w - - 4 16 ; Best move: a4b5
The current state of the chess board is: Black rook at b8, black queen at d8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at a7, black bishop at b7, black pawn at c7, black pawn at e7 and black knight at f7. Black pawn at d6. White bishop at a5, black pawn at b5, black pawn at f5 and black rook at h5. White pawn at a4, black pawn at f4 and black pawn at h4. White rook at a3, white pawn at b3, white pawn at c3, white pawn at d3 and white pawn at h3. White king at d2, white pawn at e2 and white pawn at g2. White knight at b1, white queen 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 4. Full move number is 16. White to move.