r2qkbr1/1bp5/2n1p3/pp2n1pp/3p1P2/3PQ1P1/PPP1P2P/RN1KBBR1 b q - 4 16
FEN state: r2qkbr1/1bp5/2n1p3/pp2n1pp/3p1P2/3PQ1P1/PPP1P2P/RN1KBBR1 b q - 4 16 ; Best move: d4e3
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8, black bishop at f8 and black rook at g8. Black bishop at b7 and black pawn at c7. Black knight at c6 and black pawn at e6. Black pawn at a5, black pawn at b5, black knight at e5, black pawn at g5 and black pawn at h5. Black pawn at d4 and white pawn at f4. White pawn at d3, white queen at e3 and white pawn at g3. White pawn at a2, white pawn at b2, white pawn at c2, white pawn at e2 and white pawn at h2. White rook at a1, white knight at b1, white king at d1, white bishop at e1, white bishop at f1 and white rook at g1. Black queenside is the only castle move available. Half move number is 4. Full move number is 16. Black to move.