<prompt> Bhala ukuqhubeka kwalesi sigaba - Umqondo wokunikela ngesidladla nge...b5 ne...a6 usemdala impela. UKarel Opočenský wasebenzisa lo mbono ngokumelene nabanye, uGideon Ståhlberg ePoděbrady 1936, uPaul Keres ePärnu 1937, u-Erich Eliskases ePrague 1937, noTheo van Scheltinga kuma-Olympic Chess eBuenos Aires 1939  <response>: . futhi. 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. 