Mezue ahịrịokwu na-esonụ: The Keres Attack na-etinye Black n'ọnọdụ nchebe na nke dị ize ndụ. N'ihi nke a, ọtụtụ ndị na-akwado nchebe a na-achọ igwu usoro Najdorf Variation na mgbe ahụ na-egwu 6...e6, na-abanye na Scheveningen. Ihe atụ kachasị ama nke mmasị dị otú ahụ maka iwu Najdorf na-agagharị na-ahụ na
World Chess Championship 1984, ebe mgbe egwuregwu nke mbụ gasịrị mgbe Kasparov nwere nsogbu na mmeghe, o kweghị ka Keres Attack ma mesịa gbanwee gaa na Najdorf gaa. Najdorf na-agagharị, ebe ọ na-ewepụ 6.g4, na-enye ohere ọcha nhọrọ ndị ọzọ dịka 6. Bg5, na g4 ka nwere ike ịga n'ihu. N'ụzọ bụ isi, iwu Najdorf na-egbu oge g4 site na otu mmegharị na-eme ka mwakpo ahụ ghara ịdị ike, ebe iwu Scheveningen na-eme ka mmepe nke eze na-eme 6. Bg5 adịghị ike nke ukwuu. Ebe ọ bụ na a na-atụ egwu mwakpo nke ndị Keres karịa 6. Bg5 Najdorf move order ka a na-ahụkarị n'ọkwa kachasị elu taa. N'ihi na ebumnuche mbụ nke Najdorf bụ igwu e5 niile n'otu oge na akụkọ ihe mere eme nke usoro ịkwaga, mmeghe na-amalite na 5....a6 na-etinyekarị na ngalaba Scheveningen ma ọ bụrụ na e6 na-egwu ozugbo.