Beth England proceeded with her fine ongoing structure by heading in the opener from Jonna Andersson's cross.
Spikes evened out contrary to the rules through Kerys Harrop's free header, yet the Blues hit back quickly with Sam Kerr smoothly reestablishing their lead.
Erin Cuthbert hit the post as the hosts botched opportunities to settle their nerves.
Emma Hayes' side, who have played a game more than their title rivals Arsenal, will be sure of a third back to back association title in the event that they dominate their last two matches.
Kerr told Sky Sports she was prodded on to score the champ by "developed outrage and adrenaline" at surrendering to Spurs not long before the span.
She said that her group needed to "dig profound" to guarantee the triumph, adding: "They've taken large focuses off huge clubs this year so we realized it would not have been simple.
"They're a decent group so it seems like a decent three focuses yet any success is a significant success now - there are two games to go and we're about to crush through. Assuming we get every one of the six focuses we're champions."
Chelsea v Tottenham as it worked out
'Win the only thing that is in any way important's
These different sides met on Sunday with Chelsea asserting a 3-1 triumph regardless of playing a large part of the coordinate with 10 players.
Against 11 away from home, Spurs set up another solid battle, and for a short period in the final part led to various issues through Australia forward Kyah Simon.
In any case, Chelsea's quality radiated through, and they urgently held firm to hold the benefit in the title race.
"The success is the only thing that is in any way important, and nobody recollects the exhibitions come the finish of the time, the outcome counts," Blues administrator Hayes told Sky Sports.
"Whenever it's 2-1 obviously the resistance is still in the game yet you simply need to attempt to see it out and I figured we did that."
They will be overpowering top picks against base side Birmingham City on Sunday, yet face an interesting home match against Champions League-pursuing Manchester United on the last day.
"There are two games to go. We must get new for Birmingham since we've played some hard football these last two games," added Hayes.
The title could currently be won by then assuming Spurs help Chelsea out and beat Arsenal next Wednesday.
Before that match Tottenham face Everton at Walton Hall Park on Sunday.
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