KRZYSZTOF JASSEM (Poland) is a well-known international player whose successes include winning three World titles and the Vanderbilt Cup. 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.