| | This sequence depends on this, in which the middle intermediating move is a double. This solutes following situation:     With there is to solve a corresponding symmetric situation:     Because you're dealing here with commutators the second half is the inversion of the leading moves. This way the 3 sequences / situations are easy to memorize, beside the symmetry of the situations. | |  |  | | Diese Folge leitet sich von jener ab, in der der mittlere Zwischenzug ein doppelter ist. Dieser löst folgende Situation:     Mit läßt sich dann auch eine entsprechend symmetrische Situation lösen:     Da es sich hier um Kommutatoren handelt, ist die zweite Hälfte einfach eine Umkehrung des Einleitungszuges. Somit lassen sich diese 3 Folgen / Situationen leicht einprägen, mal abgesehen davon, daß die Situationsbilder leicht zu merken sind, aufgrund ihrer Symmetrie. | | |