<prompt> Qedela le nkulumo elandelayo: Umqondo wokunikela ngesidladla esino...b5 no...a6 usemdala kakhulu. UKarel Opočenský wasebenzisa lo mbono ngokumelene, phakathi kwabanye, uGideon Ståhlberg ePoděbrady 1936, uPaul Keres ePärnu 1937, uErich Eliskases ePrague 1937, noTheo van Scheltinga e-  <response>: I-Buenos Aires Chess Olympiad ka-1939. Kamuva, umdlalo kaMark Taimanov noDavid Bronstein eMqhudelwaneni Wabangeneleli, eZurich 1953, wadonsela ukunakekela. Iningi lale midlalo liqala njenge-Kings Indian, bese kuthi abamnyama kamuva badlale...c5 no...b5. Kungenzeka ukuthi umdlalo wokuqala owasebenzisa i-1.d4 Nf6 2.c4 c5 3.d5 b5 owawuseMunich Olympic ngo-1936 kwakunguThorvaldssonVaitonis. 