Chess computers have come a long way over the years. The latest models work with Lichess and Chess.com. Many people use their smartphones to play against engines and others anyway. Before smartphones, people used to buy portable chess computers. Take the Sharper Image sm460 Computer Chess Companion for instance: it is a compact chess computer from a while back that easily fits in your bag. It has a peg sensory board and tiny pieces that you can use to enter the moves.
The SM 460 has an estimated rating of 1600, so it is made mainly for beginners. You just need 4 x AAA batteries to run this computer for hours. This model has various levels for you to choose, from 3 seconds to multiple minutes per move. You will be able to track the moves through a simple LCD display. This is a rare chess computer but you may still be able to find it on eBay.
[HT]
