4k2r/1bpp1p2/nN2p1p1/2bB3p/r3P3/5PP1/P1PP2K1/R1B3NR b k - 0 21
FEN state: 4k2r/1bpp1p2/nN2p1p1/2bB3p/r3P3/5PP1/P1PP2K1/R1B3NR b k - 0 21 ; Best move: c5b6
The current state of the chess board is: Black king at e8 and black rook at h8. Black bishop at b7, black pawn at c7, black pawn at d7 and black pawn at f7. Black knight at a6, white knight at b6, black pawn at e6 and black pawn at g6. Black bishop at c5, white bishop at d5 and black pawn at h5. Black rook at a4 and white pawn at e4. White pawn at f3 and white pawn at g3. White pawn at a2, white pawn at c2, white pawn at d2 and white king at g2. White rook at a1, white bishop at c1, white knight at g1 and white rook at h1. Black kingside is the only castle move available. Half move number is 0. Full move number is 21. Black to move.