The Pruth River Campaign was one of the most successful conflicts that the Ottomans had against the Russians. The Ottomans had managed to defeat a Russian force headed by Tsar Peter the Great. However, the Ottomans allowed the Russian force to retreat after wringing a relatively light treaty from them with some minor territorial gains and other concessions.
However, this didn't really go down well in Constantinople, where there was outrage against the light terms the Russians had escaped with. The question is, what would have happened if the Ottomans saw an opportunity to crush the Russians for years to come and kept fighting? Could they indeed cripple the Russian army and kill/capture Peter the Great? How would this affect the Great Northern War? And in the long term, how would Russia develop in the aftermath of these events?