<prompt> Christian Langeweg noma Kick Langeweg owazalwa ngo-7 Mashi 1937, ungumdlali we-chess waseNetherlands ongu-International Master IM 1962, owine izindondo ezinhlanu ze-Dutch Chess Championship 1969, 1970, 1972, 1980, 1983 kanye ne-Chess Olympiad kathathu owine izindondo zomuntu ngamunye 1966, 1970.  <response>: , 1980. 