r2qkbr1/3pppp1/1p5p/1B1b4/p1p1Q1PP/NPn1P3/PRPB1P2/4KR2 w q - 2 17
FEN state: r2qkbr1/3pppp1/1p5p/1B1b4/p1p1Q1PP/NPn1P3/PRPB1P2/4KR2 w q - 2 17 ; Best move: e4h7
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8, black bishop at f8 and black rook at g8. Black pawn at d7, black pawn at e7, black pawn at f7 and black pawn at g7. Black pawn at b6 and black pawn at h6. White bishop at b5 and black bishop at d5. Black pawn at a4, black pawn at c4, white queen at e4, white pawn at g4 and white pawn at h4. White knight at a3, white pawn at b3, black knight at c3 and white pawn at e3. White pawn at a2, white rook at b2, white pawn at c2, white bishop at d2 and white pawn at f2. White king at e1 and white rook at f1. Black queenside is the only castle move available. Half move number is 2. Full move number is 17. White to move.