rn2kb1r/6p1/2b5/ppPppP1p/P1P2PP1/8/R2K1n1P/2BQ1BNR b q - 0 20
FEN state: rn2kb1r/6p1/2b5/ppPppP1p/P1P2PP1/8/R2K1n1P/2BQ1BNR b q - 0 20 ; Best move: f2d1
The current state of the chess board is: Black rook at a8, black knight at b8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at g7. Black bishop at c6. Black pawn at a5, black pawn at b5, white pawn at c5, black pawn at d5, black pawn at e5, white pawn at f5 and black pawn at h5. White pawn at a4, white pawn at c4, white pawn at f4 and white pawn at g4. White rook at a2, white king at d2, black knight at f2 and white pawn at h2. White bishop at c1, white queen at d1, white bishop at f1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 20. Black to move.