In April 2018, Paltchik won the gold medal in the Tbilisi Grand Prix in Georgia, when he defeated Merab Margiev of Russia in the final, after two minutes and a half. In the 2018 European Championship held in April in Tel Aviv, Paltchik won a bronze medal in the category U100 kg. In the first round, he met Latvias Jevgenijs Borodavko. Two minutes from the start of the fight, Peter won a wazari, that eventually make him pass the first round. In the top-16, he met the Serbian Bojan Dosen, and after four minutes without scoring, the battle went into a golden score, in which the Serbian took the third penalty and Paltchik went up to the quarterfinal. At that stage, Paltchik overcame Zelym Kotsoiev from Azerbaijan, when a minute and 13 seconds to the end of the fight, he managed to get a wazari. In the semifinal, Paltchik competed against French Cyrille Maret. After 2 minutes and 16 seconds from the start of the fight, Maret entered a choking exercise, and Peter fainted. Afterwards, Paltchik competed for the bronze medal, facing the Russian Niiaz Bilalov, and won the fight after 39 seconds, after scoring an ippon.