Jan van Koningsveld

Jan van Koningsveld (* 1969 in Emden ) is mental arithmetic, memory sportsman and author. He is a four -time world champion, two-time Olympic gold medalist and multiple world record holder in mental arithmetic. In the " Guinness Book of World Records 2000 " it is listed for reciting the number Pi. Since 2002 he holds the world record in the discipline of "The Ultimate Test of Pi ".

Only at the age of 33, he began seriously to train the mental arithmetic and won at the first World Championships in 2004 at first the title of Vice World Champion ( overall), and the World Champion title in taking the square root. This success he confirmed at the second World Championships in 2006 when he Vice World Champion ( overall) and Vice World Champion (multiplication) was again. In the third World Cup in mental arithmetic in Leipzig in 2008, he received another world title. Van Koningsveld became world champion in the square root, and in the calendar arithmetic. In this championship, he received the title of vice world champion in the overall standings. After a third place in the calendar numeracy and fifth place in the standings in 2010, he was at the 2012 World Championships for the fourth time world champion, here in the cubic root extraction. He also won third place in the overall standings. Van Koningsveld is the most successful participants in the first five world championships, in terms of the overall standings. He succeeded as sole to always be represented in the Top 5, with a record number of four Top 3 finishes.

In the inaugural Memoriad, the Olympics for mental arithmetic and memory sport, which was held in Istanbul on 1 and 2 November 2008 Jan van Koningsveld won the gold medal in the disciplines of multiplication and Calendar Convert each. He also reached the world record in the calendar calculating with 56 correctly assigned days of the week within a minute for the period 1600-2100. These world record he could improve in the following years several times, most recently on September 7, 2010 with 78 correctly assigned days of the week within a minute. Van Koningsveld has ever placed in this category as the first man to set a record with an average computation time of under one second per date.

In 2003 he broke the world record in multiplying two eight-digit numbers ( 50.9 seconds ) and got him a year later with a time of 38.1 seconds back after he lost it a few weeks earlier.

In 2005 he set another world record, this time in the multiplication of two five-digit numbers. Here were 10 items of this type to solve consecutively and without interruption. The time for the flawless solving these tasks was 3 minutes and 6 seconds.

His student Silke beds, also a native of Emden, took part in just the three world championships. In 2004, she finished as the only female contestant to win the 3rd place in the calendar arithmetic. At the 2006 World Championships she cut off as the best of now 5 participants. The World Championships will take place as overall competition, so it will not be counted separately for men and women.

Since 2007, Jan van Koningsveld organizes launched by him Emden computing Championship annually. In various rating classes (mostly divided by school vintages ) children and adults can compete with other participants. The fun of computing is in the foreground, school grades do not matter for participation. Take part between 200 and 300 computing enthusiasts from Emden and the surrounding area every year. The computing Championship takes place at the Früchteburg school and the vocational school I in Emden.

Writings

• Robert Fountain, Jan van Koningsveld: The Mental Calculator 's Handbook. Self Publishing, 1st edition, 2013, ISBN 978-1-300-84665-9.
• Jan van Koningsveld: Add 7 days to the human calendar. Self Publishing, 1st edition, 2013, ISBN 978-1484113660.