Whakaotihia te rerenga e whai ake nei: Ko tenei tuunga mai i te Taakaro 17 o te 1978 World Championship i waenga i a Viktor Korchnoi, te kaiwhakataetae, me te Toa o te Ao, Anatoly Karpov. Ko Karpov, e tākaro ana i a Black, e whakawehi ana i tētahi hoa rangatahi ki te 39...Rc1#. Ka taea e Korchnoi te aukati i tenei ma te neke i tana g-pawn (engari kaore i te h-pawn na te mea 39.h3 ranei h4 e arahi ana ki te 39...Rc1+ 40.Kh2 Nf1+ 41.Kg1 Nfg3+ 42.Kh2 Rh1 #), e whakarato ana i tetahi papa rerenga mo tona kingi. I roto i te raruraru nui o te wa, i takaro a Korchnoi me te whakarere i muri i te 39... Nf3 + me te mate mate i muri i te 40. gxf3 Rg6 + 41. Kh1 Nf2# rānei 40.Kh1 Nf2# rānei. I haere a Karpov ki te wikitoria i te tukinga, a, i muri mai, ka hinga ano a Korchnoi i te tau 1981 i te "
Te kohurutanga i Merano".