r1bq2r1/3n3p/1p1p1b2/p1pPppkP/1n3pP1/N3B2B/P1PQP3/R3K1NR b - - 1 21
FEN state: r1bq2r1/3n3p/1p1p1b2/p1pPppkP/1n3pP1/N3B2B/P1PQP3/R3K1NR b - - 1 21 ; Best move: f4e3
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8 and black rook at g8. Black knight at d7 and black pawn at h7. Black pawn at b6, black pawn at d6 and black bishop at f6. Black pawn at a5, black pawn at c5, white pawn at d5, black pawn at e5, black pawn at f5, black king at g5 and white pawn at h5. Black knight at b4, black pawn at f4 and white pawn at g4. White knight at a3, white bishop at e3 and white bishop at h3. White pawn at a2, white pawn at c2, white queen at d2 and white pawn at e2. White rook at a1, white king at e1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 1. Full move number is 21. Black to move.