rn2kbn1/p1q1pp2/1ppp4/6N1/PP2b3/N3K2p/2PP1PPP/2BQ3R w q - 0 21
FEN state: rn2kbn1/p1q1pp2/1ppp4/6N1/PP2b3/N3K2p/2PP1PPP/2BQ3R w q - 0 21 ; Best move: e3e4
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 a7, black queen at c7, black pawn at e7 and black pawn at f7. Black pawn at b6, black pawn at c6 and black pawn at d6. White knight at g5. White pawn at a4, white pawn at b4 and black bishop at e4. White knight at a3, white king at e3 and black pawn at h3. White pawn at c2, white pawn at d2, white pawn at f2, white pawn at g2 and white pawn at h2. White bishop at c1, white queen at d1 and white rook at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 21. White to move.