KRZYSZTOF JASSEM (Poland) is a well-known international player whose successes include winning the Vanderbilt Cup and a silver medal in the World Olympiad Teams. He is professor of computer science at Poznan University. TOMEK BRUS (Translator) was born in Warsaw, Poland and emigrated to Great Britain in 1972, where he obtained a PhD in theoretical Statistics. He has worked at the University of British Columbia, Vancouver, Bristol University, Pfizer Pharmaceutical Company and Oxford Brookes University.