r1bnk1n1/ppp3p1/4r3/1QbB1p1p/P3pP1P/1NP1q3/6PR/1RB2KN1 b q - 2 21
FEN state: r1bnk1n1/ppp3p1/4r3/1QbB1p1p/P3pP1P/1NP1q3/6PR/1RB2KN1 b q - 2 21 ; Best move: c8d7
The current state of the chess board is: Black rook at a8, black bishop at c8, black knight at d8, black king at e8 and black knight at g8. Black pawn at a7, black pawn at b7, black pawn at c7 and black pawn at g7. Black rook at e6. White queen at b5, black bishop at c5, white bishop at d5, black pawn at f5 and black pawn at h5. White pawn at a4, black pawn at e4, white pawn at f4 and white pawn at h4. White knight at b3, white pawn at c3 and black queen at e3. White pawn at g2 and white rook at h2. White rook at b1, white bishop at c1, white king at f1 and white knight at g1. Black queenside is the only castle move available. Half move number is 2. Full move number is 21. Black to move.