Zilch is a computer chess engine and the predecessor to Vapor, the engine I am currently developing.

Zilch was my first stable chess engine. It was preceded by some prototypes I called Knightmare, but they were only experimental and very unstable. It was written from scratch and not based on Knightmare in any significant way. While I intended to release it eventually, it turned out to be vaporware -- which inspired the name of my new engine, Vapor -- primarily because it made use of a small amount of code that wasn't my own. It ran on my 64-bit Linux box and used the xboard protocol.

Copyright © 2010 by Michael Leany