It was the last day of legally permitted campaigning for the presidential plebiscite scheduled for Wednesday.

But when General Pinochet faces the voters Wednesday in a presidential plebiscite, it will be under circumstances in which opponents think they have a fair chance of defeating him.

Beginning their campaign to defeat Gen. Augusto Pinochet in a presidential plebiscite, opposition parties promised today not to let Chile fall into a power vacuum or instability if they succeed.

The politician, Patricio Aylwin, president of the Christian Democrats, led the opposition to victory over Gen. Augusto Pinochet in the presidential plebiscite in October.

Is General Pinochet deliberately spreading fear in order to control an increasingly militant opposition that may vote him out of office in a presidential plebiscite that must take place before March 1989?

The programming was to have been part of the 15 minutes of free national television time allotted nightly to opposition parties trying to defeat General Pinochet in a presidential plebiscite on Oct. 5.

Myriad research groups, consultants and others are polling Chileans about their attitudes toward the coming presidential plebiscite, and it is common wisdom that every organization shapes the questions according to its own biases.

Opponents of Gen. Augusto Pinochet concluded their campaign to defeat him in Wednesday's presidential plebiscite with a huge rally today that brought people from the farthest corners of the country.

Political opponents of President Augusto Pinochet are setting up an extensive vote-counting network of their own that they say will guarantee against fraud in the coming presidential plebiscite.

The graffiti here mostly say "Si" -a call to vote for Gen. Augusto Pinochet in the presidential plebiscite.