QueenBee is an experiment in monte carlo and distributed computing.
The even later incarnation of my chess program. This one is written in Java and is brute force. It later became DeepBrutePos/PuppetMaster: a program which doesn't play chess itself but asks 7 other programs what they would do in a position. Then the most often chosen is played.
The latest incarnation of my chess program. Written in Java. It is the first which played legal chess and does not crash. It doesn't use a search-tree(!).
My second attempt at a chess-program, in C++. Like bullucks this was written way before I had internet access and thus access to sources of information on the computer chess topic. Cpp1 and bullucks don't always play valid chess and also crash often.