2rq1knr/pp2b3/5p1p/Pn2pPp1/1pB1P2P/N5R1/1B1PNP2/R2K4 b - - 1 21
FEN state: 2rq1knr/pp2b3/5p1p/Pn2pPp1/1pB1P2P/N5R1/1B1PNP2/R2K4 b - - 1 21 ; Best move: b4a3
The current state of the chess board is: Black rook at c8, black queen at d8, black king at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7 and black bishop at e7. Black pawn at f6 and black pawn at h6. White pawn at a5, black knight at b5, black pawn at e5, white pawn at f5 and black pawn at g5. Black pawn at b4, white bishop at c4, white pawn at e4 and white pawn at h4. White knight at a3 and white rook at g3. White bishop at b2, white pawn at d2, white knight at e2 and white pawn at f2. White rook at a1 and white king at d1. Both players have exhausted their castles. Half move number is 1. Full move number is 21. Black to move.