Complex sentence: Portisch defeated Samuel Reshevsky in a playoff match to advance to the Candidates' series for the first time, but he lost his first round match against Mikhail Tal at Bled 1965, by 2.5-5.5.
Split into simpler sentences: Portisch defeated Samuel Reshevsky in a playoff match to advance to the Candidates' series for the first time. But he lost his first round match against Mikhail Tal at Bled 1965, by 2.5-5.5.