rnb2b1r/pp1p1n2/B2kN3/4p2p/q1pPP1P1/R1P5/1PQ2P2/1N2K2R b - - 4 21
FEN state: rnb2b1r/pp1p1n2/B2kN3/4p2p/q1pPP1P1/R1P5/1PQ2P2/1N2K2R b - - 4 21 ; Best move: a4c2
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black bishop at f8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at d7 and black knight at f7. White bishop at a6, black king at d6 and white knight at e6. Black pawn at e5 and black pawn at h5. Black queen at a4, black pawn at c4, white pawn at d4, white pawn at e4 and white pawn at g4. White rook at a3 and white pawn at c3. White pawn at b2, white queen at c2 and white pawn at f2. White knight at b1, white king at e1 and white rook at h1. Both players have exhausted their castles. Half move number is 4. Full move number is 21. Black to move.