rn2kbn1/2p1ppp1/2rq4/1p1p4/5P1P/B1NPP2b/P5R1/b2QKBN1 b q - 1 20
FEN state: rn2kbn1/2p1ppp1/2rq4/1p1p4/5P1P/B1NPP2b/P5R1/b2QKBN1 b q - 1 20 ; Best move: a1c3
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 knight at g8. Black pawn at c7, black pawn at e7, black pawn at f7 and black pawn at g7. Black rook at c6 and black queen at d6. Black pawn at b5 and black pawn at d5. White pawn at f4 and white pawn at h4. White bishop at a3, white knight at c3, white pawn at d3, white pawn at e3 and black bishop at h3. White pawn at a2 and white rook at g2. Black bishop at a1, white queen at d1, white king at e1, white bishop at f1 and white knight at g1. Black queenside is the only castle move available. Half move number is 1. Full move number is 20. Black to move.