rnb1kb1r/3p1p2/4p1p1/pp5p/1PP2qP1/4BN1P/P3PKn1/2RQ1BNR b q - 0 20
FEN state: rnb1kb1r/3p1p2/4p1p1/pp5p/1PP2qP1/4BN1P/P3PKn1/2RQ1BNR b q - 0 20 ; Best move: g2e3
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at d7 and black pawn at f7. Black pawn at e6 and black pawn at g6. Black pawn at a5, black pawn at b5 and black pawn at h5. White pawn at b4, white pawn at c4, black queen at f4 and white pawn at g4. White bishop at e3, white knight at f3 and white pawn at h3. White pawn at a2, white pawn at e2, white king at f2 and black knight at g2. White rook 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.