4kb1r/1bpnpp1p/r3q2B/np1p2P1/P1PPP2p/3BK3/5P2/RN2Q1NR b - - 4 21
FEN state: 4kb1r/1bpnpp1p/r3q2B/np1p2P1/P1PPP2p/3BK3/5P2/RN2Q1NR b - - 4 21 ; Best move: d5e4
The current state of the chess board is: Black king at e8, black bishop at f8 and black rook at h8. Black bishop at b7, black pawn at c7, black knight at d7, black pawn at e7, black pawn at f7 and black pawn at h7. Black rook at a6, black queen at e6 and white bishop at h6. Black knight at a5, black pawn at b5, black pawn at d5 and white pawn at g5. White pawn at a4, white pawn at c4, white pawn at d4, white pawn at e4 and black pawn at h4. White bishop at d3 and white king at e3. White pawn at f2. White rook at a1, white knight at b1, white queen at e1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 4. Full move number is 21. Black to move.