WS MoreOrLess: Maths and Chess

Episode Summary

Executive Summary: Tim Harford interviews former maths professor and top chess grandmaster John Nunn about whether mathematics helps chess. Nunn argues the link is mostly about personality, not direct skill transfer: both attract problem-solvers, but chess is better understood through psychology, discipline, and pattern recognition. The discussion also covers how computers transformed elite chess, improving analysis and public access while enabling new forms of cheating.

Main Topics: Maths and chess: correlation, not causation (Priority: 5/5): Nunn rejects the idea that studying mathematics directly improves chess performance. He says the overlap is mainly that both appeal to analytical, problem-solving people. Why child prodigies appear in chess, maths, and music (Priority: 4/5): Nunn explains that these are self-contained formal systems with internal rules, allowing early mastery without broader life experience. John Nunn’s career and reputation (Priority: 3/5): The interview frames Nunn as an unusually gifted mathematician turned professional chess player, highlighting his elite peak and broad interests. Computers' impact on modern chess (Priority: 5/5): Nunn describes how chess engines now outclass humans and are used routinely for analysis, changing preparation and elite play. Cheating and transparency in the computer era (Priority: 4/5): He notes that pocket devices have made in-game cheating easier, but computers also allow live online viewing with expert evaluation. Lasker, logic, and psychology in chess (Priority: 5/5): Nunn argues Emmanuel Lasker’s success owed more to psychological insight and creating awkward positions than to mathematical logic.

Key Arguments: There is a connection between maths and chess mainly because both attract people with a problem-solving mentality, not because maths directly makes you better at chess. Chess can be valuable for children because it teaches patience, consequence-thinking, and avoiding impulsive decisions. Child prodigies are more common in self-contained disciplines like chess, maths, and music because these fields have internal rule systems that can be mastered early. Magnus Carlsen’s remark that Nunn was "too clever" is interpreted as meaning Nunn had too many interests to focus exclusively on chess. Computers have radically changed elite chess: modern engines are stronger than the human world champion and are used to check openings and moves. The computer era has both harmed chess through cheating risks and helped it through wider live coverage and stronger public commentary. Emmanuel Lasker’s success was driven less by abstract logic and more by psychology: he selected moves that increased the chance of an opponent’s error. A move can be objectively equal on computer evaluation yet still be chosen because it creates a more uncomfortable position for the opponent.

Data Points: John Nunn world ranking peak: 9th in the world - Described as his highest ranking during his professional chess career. Age at Oxford: 15 - Nunn went up to Oxford at age 15 to read maths. Interview reference age: 5 years ago - Harford cites an interview with Magnus Carlsen from five years prior. BBC programme origin: BBC World Service - The short edition of More or Less was first broadcast there.

Pivotal Quotes: "I think there is a slight connection between maths and chess in that they both appeal to the same sort of person." — John Nunn: Explaining the relationship between mathematics and chess "I think it was his understanding. He had a very deep understanding of chess." — John Nunn: Describing why Emanuel Lasker became world champion "I'm actually going to concede at this point." — Tim Harford: Harford resigns after being outplayed during the on-air chess game

Implications: For listeners, the episode suggests that chess success comes more from mindset, discipline, and psychology than from math ability. For modern chess, computers have become essential tools and public assets, even as they raise cheating concerns.