rn2q1r1/5k2/1N1pb2p/p1p3p1/1P1b1B2/3B1Pn1/P1P4P/R2K2N1 b - - 5 21
FEN state: rn2q1r1/5k2/1N1pb2p/p1p3p1/1P1b1B2/3B1Pn1/P1P4P/R2K2N1 b - - 5 21 ; Best move: g5f4
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at e8 and black rook at g8. Black king at f7. White knight at b6, black pawn at d6, black bishop at e6 and black pawn at h6. Black pawn at a5, black pawn at c5 and black pawn at g5. White pawn at b4, black bishop at d4 and white bishop at f4. White bishop at d3, white pawn at f3 and black knight at g3. White pawn at a2, white pawn at c2 and white pawn at h2. White rook at a1, white king at d1 and white knight at g1. Both players have exhausted their castles. Half move number is 5. Full move number is 21. Black to move.