rn1q1k2/p1pb1p1p/1r5n/1p1pp1pP/P3PP2/R3Q1P1/1PPK1NB1/1NB3R1 b - - 4 16
FEN state: rn1q1k2/p1pb1p1p/1r5n/1p1pp1pP/P3PP2/R3Q1P1/1PPK1NB1/1NB3R1 b - - 4 16 ; Best move: d5d4
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8 and black king at f8. Black pawn at a7, black pawn at c7, black bishop at d7, black pawn at f7 and black pawn at h7. Black rook at b6 and black knight at h6. Black pawn at b5, black pawn at d5, black pawn at e5, black pawn at g5 and white pawn at h5. White pawn at a4, white pawn at e4 and white pawn at f4. White rook at a3, white queen at e3 and white pawn at g3. White pawn at b2, white pawn at c2, white king at d2, white knight at f2 and white bishop at g2. White knight at b1, white bishop at c1 and white rook at g1. Both players have exhausted their castles. Half move number is 4. Full move number is 16. Black to move.