What kind of file type is required to upload a sudoku that I created?

[Will Power]

The system tells me it doesn't recognize an Excel file when I try to upload, and I do not know how to save a file on F-Puzzles.com, if that is the preferred file type.  Thank you.

[Modesty]

You can find help here:

https://logic-masters.de/Raetselportal/H...?chlang=en

Once all requirements are met you can start. Most puzzles require a puzzle diagram. You can upload image files to our server using the upload files page. If the upload is successful you will see a six-character image ID. The following file formats are recognised: PNG, JPEG, GIF, BMP, TIFF, XCF, PS, and EPS. If your puzzle diagram is available in a different format you have to convert it to one fo these formats first. Watch out: you can also upload PDF files for the contest engine, but you can't use PDF files in the puzzle portal!

[Will Power]

You can find help here:

https://logic-masters.de/Raetselportal/H...?chlang=en

Once all requirements are met you can start. Most puzzles require a puzzle diagram. You can upload image files to our server using the upload files page. If the upload is successful you will see a six-character image ID. The following file formats are recognised: PNG, JPEG, GIF, BMP, TIFF, XCF, PS, and EPS. If your puzzle diagram is available in a different format you have to convert it to one fo these formats first. Watch out: you can also upload PDF files for the contest engine, but you can't use PDF files in the puzzle portal.

  
Danke, Modesty

[Dandelo]

Short: Type in the text, in English or German or both. If only one language, leave the other field empty, for solution code look at similar puzzles. Create a picture file (e.g. PNG), width maximal 1000px, upload the file, remember the number (###) and refer to it with <img:###>. The rest in standard html, if needed.

For a detailed description follow Mody's link.

I don't know f-puzzles, but with penpa+, it is possible to create almost everything needed. There, click on 'screenshot', reduce the width to 1000px (if it is greater, for 9x9-sudokus not necessary).

From Excel  it should also be possible to create a picture.