r1bq1rk1/5p2/B1n1p1p1/NPpp3p/8/R1Pn1Qb1/1B2NPPP/3K3R b - - 1 21
FEN state: r1bq1rk1/5p2/B1n1p1p1/NPpp3p/8/R1Pn1Qb1/1B2NPPP/3K3R b - - 1 21 ; Best move: d3b2
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black rook at f8 and black king at g8. Black pawn at f7. White bishop at a6, black knight at c6, black pawn at e6 and black pawn at g6. White knight at a5, white pawn at b5, black pawn at c5, black pawn at d5 and black pawn at h5. White rook at a3, white pawn at c3, black knight at d3, white queen at f3 and black bishop at g3. White bishop at b2, white knight at e2, white pawn at f2, white pawn at g2 and white pawn at h2. White king at d1 and white rook at h1. Both players have exhausted their castles. Half move number is 1. Full move number is 21. Black to move.