Ma Tsun-Kuen (MTK) Tai Chi Chuan is based on Yang style techniques, but differs often in emphasis and execution.
Fernando Chedel (born 1949 in Argentina) started learning Tai Chi Chuan with Master Ma Tsun-Kuen in 1973 and trained intensively with him until Master Mas death in 1993. Fernando became the lineage holder and renamed the school after his Master.
In 2005 Fernando moved to Spain, and now holds workshops in Spain, and teaches regularly across Europe and Argentina. matsunkuen.com