The Chess Champion Mark V shot to fame when it won the World Microcomputer Chess Championship (Commercial Class) at Travemunde, West Germany held on 21st - 26th September 1981. It was up against a Fidelity Champion Sensory Chess Challenger, a Novag Savant and a Great Game Machine with Grunfeld / Morphy / Capablanca modules. It scored 8.5 / 12 although it lost 1.5 / 2.5 to the Fidelity. This is the crucial win by Mark V over the Fidelity (link) in the last round.

The strength of play assumed from this win allied to a striking design and many new features made it a must have machine for the chess computer enthusiast. Well this enthusiast at least.

The Mark V was regarded as cutting edge technology, and at a comparatively reasonable price. The cost was £280, compared with a GGM + Morphy at £295 and a Fidelity Champion Sensory at £330 in the UK.

In May 1981 the protoype Mark V (below) had competed at the Chess Programs World Tournament in Paris. There it came second to Mephisto Experimental X (Mephisto II) scoring 5/7 after losing from a piece up against that rival in the fifth round. The Mark V also drew with two Morphy versions.

In September just before Travemunde it took part in the European Microcomputer Chess Championship in London. This event was held at the Personal Computer World show at The Barbican and I went along to have a look. I remember being fascinated watching Martin Bryant’s White Knight in action and particular the displayed evaluations, move sequences etc. Something I had never seen before. Anyway Mark V finished 9th of 12 in a very strong competition. The winner was Richard Lang’s Cyrus, from Dave Wilson and Mike Johnson’s Advance 2.0 and Kaare Danielsen’s Logichess.
 

Photo provided by the owner, a German collector

Opening up the Chess Champion Mark V reveals it to be more complex than other chess computers of this era. The modular design, LCD chessboard and extensive keypad options all contribute to the complexity.