Road to the Grandmaster title - 3 ways to save a lost game

There are 3 key ways to save a lost game: 1. stalemate 2.perpetual checks 3.perpetual attack

In today's training I studied those possibilities and used 2 hours to solve puzzles

from                Chess Tactics for the Tournament Player

---------------------------------------------------------------------------------------------------------------

First I would like to show an example which was played by the great American Champion Frank Marshall (Frank James Marshall (August 10, 1877 – November 9, 1944) was the U.S. Chess Champion from 1909 to 1936, and one of the world's strongest chess players in the early part of the 20th century.) - wikipedia