Once a photo has won a challenge it can't be used again in future challenges. This includes any revised versions with a crop, flip, hue changes or a nearly identical version.

The spirit of GuruShots is to show off your photography skills and using a very similar or almost identical photo every time to continue winning goes against that ethos.
We would appreciate it if you could try to win with other photos and retire similar or almost identical photos.

The only unique case in which this is allowed: a photo is taking part in several active challenges and wins one of them. This is the only time where the photo will not be removed from the challenges.
Note: If you swap the photo out of the challenge after the win, you will not be able to bring it back in.