rnb1kbr1/Np1p1pp1/3R4/P1p1p2P/1B6/1PP1n2P/3KPP2/5BNR w q - 5 20
FEN state: rnb1kbr1/Np1p1pp1/3R4/P1p1p2P/1B6/1PP1n2P/3KPP2/5BNR w q - 5 20 ; Best move: d2e3
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 g8. White knight at a7, black pawn at b7, black pawn at d7, black pawn at f7 and black pawn at g7. White rook at d6. White pawn at a5, black pawn at c5, black pawn at e5 and white pawn at h5. White bishop at b4. White pawn at b3, white pawn at c3, black knight at e3 and white pawn at h3. White king at d2, white pawn at e2 and white pawn at f2. 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 5. Full move number is 20. White to move.