The chess scandal started by the unvoiced, but crystal clear, accusation by the world champion Magnus Carlsen towards GM Hans Niemann after losing to him, has rocked the chess world and world at large.

Accusations have been flying in social media with amateurs bringing all manner of 'data' to either condemn or exonerate the young American player. Others are happy to start throwing stones using mannerisms and attitudes as evidence.

Here is an interview with world renowned expert in cheating detection in chess, Professor Kenneth Regan, who analyzed all of Hans Niemann's games and events from the last two years. These include not only all over-the-board games, but also his online games, including on chess.com, and provides a comprehensive study of the results and renders his verdict.

Chapters:
00:00 Short background of Ken Regan
00:46 First work with chess cheating ('toiletgate')
02:27 Judging on a move or a handful of moves
04:50 What the full test does
07:45 Testing Niemann in Sinquefield
08:50 What is red flag in testing?
13:55 Were Niemann's online games analyzed?
15:00 The principle of 'forcing moves' in toiletgate
18:16 Analysis of all Niemann's games in 2 years
23:18 What is difference between games broadcast and not?
26:09 Comparing to GM Igor Rausis (cheater)
28:23 Chess.com Tweet and accusation
30:20 Are broadcast games more suspicious
32:45 Overview of tournament results
38:30 The meteoric rise of Hans Niemann
43:12 Close look at Capablanca Memorial win (with SF15)
48:15 The question of style
49:52 Verdict for over-the-board chess (since Sept 2020)
50:08 Verdict for online chess (since Sept 2020)
53:01 Verdict for Chess.com games (since Sept 2020)
53:53 Wrap-up

Article at ChessBase News:
https://en.chessbase.com/post/is-hans...

Link to Regan's analysis (shown in video) of Niemann's games:
https://cse.buffalo.edu/~regan/chess/...

Ken Regan's celebrated math blog "Gödel's Lost Letter":
https://rjlipton.wpcomstaging.com/

This is a slightly abridged version of the full interview at    • Is Hans Niemann a cheater? - World re...