The Pulsar Engine plays Chess, with levels, and six variants. It also includes classic and modern game collections including Kasparov, Carlsen and Morphy. Works offline. I originally developed Pulsar starting in 1998, and between 2002-2009 taught it to play the variants it knows. It was released on mobile for the first time in 2014 and on Android in 2019. The variants are Chess960, Crazyhouse, Atomic, Loser's, Giveaway(also known as Suicide – goal is to lose your pieces) and Three Checks. I