Magnus Carlsen's impressive year-long winning streak in classical chess came to an end at the TePe Sigeman Chess Tournament 2026, where he was defeated by Dutch Grandmaster Jorden van Foreest in a thrilling Round 4 match. Carlsen, who had not lost a classical game since his notable defeat to Gukesh Dommaraju at Norway Chess 2025, faced a challenging multi-piece ending against Van Foreest. Despite having opportunities to hold the game, Carlsen's knight was trapped, leading to his resignation. Van Foreest expressed surprise at his victory, noting the game's fascinating nature. This loss is significant as it interrupts Carlsen's return to classical chess after stepping back from the world title in 2022, during which he focused on rapid and blitz formats. The tournament also features 14-year-old Yagiz Kaan Erdogmus, who has taken the sole lead, further intensifying the competition.