rnb1kb1r/3pp1p1/pQp5/5p1p/1n1PNq2/2B1PP2/P1P3PP/2KR1BNR w q - 4 16
FEN state: rnb1kb1r/3pp1p1/pQp5/5p1p/1n1PNq2/2B1PP2/P1P3PP/2KR1BNR w q - 4 16 ; Best move: e3f4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at d7, black pawn at e7 and black pawn at g7. Black pawn at a6, white queen at b6 and black pawn at c6. Black pawn at f5 and black pawn at h5. Black knight at b4, white pawn at d4, white knight at e4 and black queen at f4. White bishop at c3, white pawn at e3 and white pawn at f3. White pawn at a2, white pawn at c2, white pawn at g2 and white pawn at h2. White king at c1, white rook at d1, white bishop at f1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 4. Full move number is 16. White to move.