rnb1k3/pp1pb2p/2p1r2P/4Pp2/P7/2P5/2RPQKPR/1NB2B2 b q - 2 21
FEN state: rnb1k3/pp1pb2p/2p1r2P/4Pp2/P7/2P5/2RPQKPR/1NB2B2 b q - 2 21 ; Best move: d7d5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8 and black king at e8. Black pawn at a7, black pawn at b7, black pawn at d7, black bishop at e7 and black pawn at h7. Black pawn at c6, black rook at e6 and white pawn at h6. White pawn at e5 and black pawn at f5. White pawn at a4. White pawn at c3. White rook at c2, white pawn at d2, white queen at e2, white king at f2, white pawn at g2 and white rook at h2. White knight at b1, white bishop at c1 and white bishop at f1. Black queenside is the only castle move available. Half move number is 2. Full move number is 21. Black to move.