. . . . "But when I play advanced chords, where it is nessecary to press each and every string with the barree-indexfinger, some strings, especially the D- and G-string,are stummed and not pressed sufficiently.I am able to solve this problem by pressing the indexfinger very very hard on the strings, but I??m afraid, this is not the very best way to solve this problem, not least as this very hard pressure n" .