The Blues blew the title race wide open with their 2-0 victory at Anfield yesterday that ended Liverpool's 11-game winning run, with Demba Ba and Willian getting on the scoresheet.
Chelsea boss Jose Mourinho has been criticised for his decision to set up defensively and catch Liverpool on the counter, which prompted Liverpool boss Brendan Rodgers to suggest that the Blues had gone beyond simply trying to stifle his side.
"We were clearly the better side today but congratulations to Chelsea," he said.
"They won the game. We just couldn't find the breakthrough today. They were obviously set up really deep. I think it was two buses parked today rather than one."
However Schwarzer, who has stepped in between the posts following Petr Cech's season-ending shoulder injury last week, says that the final score justified Chelsea's approach.
"We played right down to the gameplan and it worked very, very well,” the 41-year-old told the Alan Brazil Sports Breakfast.
“Obviously we tried to slow the game down, that was obvious from the start, and it worked in our favour. It frustrated Liverpool and it frustrated their fans and the pressure started to mount on them.
“They had everything in their own hands and they really needed to win to continue the momentum and keep it in their own hands but the longer we went without conceding, the more pressure we applied by taking our time with things and the more frustrated they became.
“The bottom line is there was a tactic we employed and it worked down to a tee. We play within the rules, we played as we thought we could get a result and frustrate Liverpool at Anfield and it worked."
Liverpool are the league's highest scorers this season, and are aiming for their first ever Premier League title. Three points now separate them from Manchester City in third place, although they have a game in hand on the Reds - while Chelsea are in second, two points adrift of the leaders.
“Football is a strange game and there are all sorts of different tactics you can play," Schwarzer continued.
"A couple of weekends ago there was a very open and free-flowing game between Liverpool and Manchester City and everyone loved it because of the amount of goals that were scored, but the bottom line is we wanted to go there and win the game.
“We didn’t want to just go there and sit back and just try to get a result or park two buses in front of our goal, like it was suggested. We wanted to be strong defensively but we also wanted to attack them and score goals on the counter or whenever the opportunities came along and it worked perfectly for us.”