[YetAnotherNick]

IBM has 1mm * 1mm chip comparable in performance to 1990 Intel, likely much lower in weight than 1g along with photovoltaic cell for power[0]. I don't think this is enough for beating Magnus, but it could at least find tactics.

[0]: https://www.theverge.com/circuitbreaker/2018/3/19/17140116/i....