Sergei Tiviakov was the surprise winner of the 2026 Netherlands Chess Championships held at the Renaissance Amsterdam Schiphol Airport Hotel. Whilst the event was missing the strongest two players, Anish Giri and Jordan van Foreest, it was a pretty respectable field and Tiviakov was the eighth seed.

Tiviakov beat IM Eelke De Boer in the first round. In the second he lost the first game to Erwin L'Ami but recovered in a must win game two before winning the blitz (5m+2spm) tie-breaks 1.5-0.5. He beat Eric Van den Doel 1.5-0.5 in the semi-finals. His opponent in the final was another surprise, 9th seed 24-year-old Liam Vrolijk. The two classical games were drawn before Tiviakov won the two blitz games to take the title.