International Master Herman Grooten has over 35 years' experience as a professional chess trainer, with many pupils becoming world's leading players, such as GM Loek Van Wely,GM Benjamin Bok, GM Robin Swinkels etc. He wrote several books, all of hem received a world wide great acclaim.

The concept is extremely attractive to amateur players: whatever your strength, it carries the promise of learning or revising some general strategic knowledge in an easy way. GM Mathew Sadler, New In Chess Magazine 05/19.

International Master Herman Grooten has over 35 years' experience as a professional chess trainer, with many pupils becoming world's leading players, such as GM Loek Van Wely,GM Benjamin Bok, GM Robin Swinkels etc. He wrote several books, all of hem received a world wide great acclaim.

The concept is extremely attractive to amateur players: whatever your strength, it carries the promise of learning or revising some general strategic knowledge in an easy way. GM Mathew Sadler, New In Chess Magazine 05/19.