Fabiano Caruana, the world No 2, retained his national title on Wednesday when he scored an unbeaten 7/10 in the US Championship at St Louis. First prize was $62,000. Caruana’s winning margin was a comfortable point and a half, after a final round where he won while his nearest rivals all drew or lost, leading to a six-way tie for second on 5.5/10.

The runners-up included the controversial Hans Niemann, who cemented his place among the world top 20, the rising talents Samuel Sevian and Awonder Liang; and the established grandmasters Levon Aronian, Ray Robson and Leinier Domínguez. Wesley So, a pre-tournament favourite, scored 5/10, drew every game and dropped out of the world top 10.

Related: Chess: England gains new grandmaster as Ameet Ghasi qualifies at age 37

Caruana now joins an elite group who have all won at least four US titles: Jackson Showalter, Samuel Reshevsky, Bobby Fischer, Larry Evans, Walter Browne, Yasser Seirawan, Alexander Shabalov, Gata Kamsky and Hikaru Nakamura. Among these, he has been closer to the world crown than any apart from Fischer, holding Magnus Carlsen to 6-6 in their 2018 title match before losing a speed tie-break.

With a peak of 2851, Caruana is the third highest rated chess player in history after Carlsen and Garry Kasparov. He confirmed after the tournament that he will go for a fifth crown in 2025.

This low-scoring contest was affected by the alleged offboard assault reported in last week’s column. Subsequently, Christopher Yoo’s father issued a statement, while Yoo himself made a written personal apology.

Chess is a mind sport, but it still has physical components including adrenalin and increased heart rate under stress. If you win, celebrate. If you lose, you are trapped in your negative emotions, without a physical outlet. Hence, coping with defeat can be difficult, especially after losing an advantage.

Most players try to deal with it internally, and Boris Spassky once cried in the street after a painful loss to Mikhail Tal. There are a few cases of taking it out on the hotel furniture or the opponent, but a fist to an innocent bystander is something else.

Carissa Yip, 21, won her first eight games in the US Women’s Championship and was in contention for the $64,000 Fischer prize for anyone equalling his 11/11 “picket fence” in the 1963-64 US Championship.

Yip lost her next two games but still retained her crown with a round to spare. The 21-year-old won the second board gold medal with 10/11 at the Olympiad, and is on the verge of breaking into the world top 30. She can also realistically aim at the $100,000 Cairns Chess Queen award for US women who become grandmasters at open level.

Ethan Pang, nine, who earlier this year became the youngest ever 2200-rated player and who last month beat three grandmasters in a single tournament, reached a landmark 2300 live rating on Thursday when he led the ongoing Vezerkepzo IM tournament in Budapest with an unbeaten 4/6.

If Pang is still above 2300 at the end of the tournament, he would break the Argentinian prodigy and “chess Messi” Faustino Oro’s age record as the youngest published 2300 player, although Oro would be younger in terms of when the record was set.

Pang lost in Friday morning’s seventh round, but can still regain 2300 with a good performance in his final three games this weekend. His games are available in play-through format at chess-results.com

3943: 1 Rxh7+! and Black resigned. If 1…Qxh7 2 Qe8+ Qg8 3 Rh1 mate. If 1…Kxh7 2 Rh1+ Kg8 3 Qxd5+ when if 3…Qf7 4 Nh6+ forks king and queen and soon mates, or 3…Kf8 4 Rh8+ Qg8 5 Rxg8 mate.

The Channel Isles have a long chess history, and Guernsey’s annual international is now in its 48th year. It is staged in the autumn, with Jersey’s similar event in the spring. Both have given many English talents their first taste of an overseas event, starting with Jersey 1975 when Nigel Short, then aged nine, made his international debut. However, there has never been a result like Guernsey 2024, where three of the top four places went to women and the fourth to a grandmaster.

Anita Strade (Guernsey) and Katarzyna Toma (England) shared first with 5.5/7, followed by the No 1 seed, GM Keith Arkell (England), and Olivia Smith (Wales) and two other players on 5/7. All three women are in their late-30s, and for each of the trio it was a lifetime best result, as they performed between 100 and 250 points better than their official ratings.

Last month’s Budapest Women’s Olympiad can take some credit, for all three competed there, with Strade and Smith making excellent scores on top board for their countries and Toma solid on board four for England. Arkell rarely loses in similar tournaments and won all his five games against male opponents, but both Smith and Toma defeated him in their individual games. Leonard Barden