Comment by modin

I played Kasparov in 2017, in a setting similar to Capablanca in the ingress of the article. Whilst I managed 50+ moves, he was sometimes struggling in a way I wouldn't have expected for a GM. It so happened that our chess board was turned "upside down" by the organisers (we didn't notice until it was time to start; white was on row 7,8 instead of 1,2), and I have always wondered how much that mattered.