rnb3n1/pp1kb1p1/1N3p2/4pN1r/2p1p3/PPP3p1/2BP1P1P/1RB2K1R b - - 1 20
FEN state: rnb3n1/pp1kb1p1/1N3p2/4pN1r/2p1p3/PPP3p1/2BP1P1P/1RB2K1R b - - 1 20 ; Best move: a7b6
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8 and black knight at g8. Black pawn at a7, black pawn at b7, black king at d7, black bishop at e7 and black pawn at g7. White knight at b6 and black pawn at f6. Black pawn at e5, white knight at f5 and black rook at h5. Black pawn at c4 and black pawn at e4. White pawn at a3, white pawn at b3, white pawn at c3 and black pawn at g3. White bishop at c2, white pawn at d2, white pawn at f2 and white pawn at h2. White rook at b1, white bishop at c1, white king at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 1. Full move number is 20. Black to move.