As for less to go to the parent of the parent?

Is it possible less to move to the parent of the parent?

.class1 {
 &-class2 {
 {how to indicate class1}-class3 {

}
}
}

so you need:

.class1 .class1-class2 .class1-class3 {
...
}

sample tags:

p { /* visible in the entire document */
 p { /* visibility only p[0] */
color:blue;
 p { /* visibility only in p[1] */
color:red;
}
}
}