r1b3k1/1p2b1pr/p4p1p/1Np1n3/2pqPPnP/P1Q5/1PPBN1P1/3R1K1R b - - 13 20
FEN state: r1b3k1/1p2b1pr/p4p1p/1Np1n3/2pqPPnP/P1Q5/1PPBN1P1/3R1K1R b - - 13 20 ; Best move: d4f2
The current state of the chess board is: Black rook at a8, black bishop at c8 and black king at g8. Black pawn at b7, black bishop at e7, black pawn at g7 and black rook at h7. Black pawn at a6, black pawn at f6 and black pawn at h6. White knight at b5, black pawn at c5 and black knight at e5. Black pawn at c4, black queen at d4, white pawn at e4, white pawn at f4, black knight at g4 and white pawn at h4. White pawn at a3 and white queen at c3. White pawn at b2, white pawn at c2, white bishop at d2, white knight at e2 and white pawn at g2. White rook at d1, white king at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 13. Full move number is 20. Black to move.