STARTING POINT

With half a dozen resignations and redrawn boundaries moving 770,000 voters to different seats, a lot has changed since 2019.

Coalition - 45 (33 Liberal, 12 Nationals)

Labor - 38

Greens - 3

Independents - 7 (Ward, Greenwich, Dalton, Butler, Donato, Piper, McGirr)

UNIFORM SWING NEEDED

For majority government (47 seats):

Coalition - 1.7 per cent

Labor - 6.2 per cent

BUT IT'S MORE COMPLICATED THAN THAT

About one in five seats in 2019 were non-classic contests, meaning a non-major-party candidate won or came second in a seat.

The Liberals face five battles in northern Sydney seats from independents, as well as a Climate 200-backed candidate in Wollondilly.

Three-cornered contests will also occur in Lismore, Tweed and Port Macquarie

Shooters are trying to regain three regional seats held by MPs who quit mid-term

RETIRING MEMBERS

Coalition - 13 including in five ministers

Labor - 3

Other - 2

VULNERABLE COALITION SEATS

Heathcote (notionally Labor 1.7 per cent after redistribution)

East Hills (held by 0.1)

Upper Hunter (Nationals hold by 0.5)

Penrith (0.6)

Goulburn (3.1)

Willoughby (3.3 v Independent)

Tweed (NAT 5.0)

Wollondilly (6.0 v Ind)

Winston Hills (5.7)

Holsworthy (6.0)

Riverstone (6.2)

Parramatta (6.5)

VULNERABLE LABOR SEATS

Kogarah (0.1)

Leppington (1.5)

Lismore (2.0 v NAT, threat from Greens)

OTHER KEY SEATS

Murray (Shooters-turned-independent 2.8 v NAT)

Barwon (Shooters-turned-independent 6.6 v NAT)

Orange (Shooters-turned-independent 15.2 v NAT)

UPPER HOUSE

21 of 42 seats up for grabs. Seats not up for re-election are held by:

Coalition - 8

Labor - 7

Greens - 2

One Nation - 2

Shooters, Fishers and Farmers - 1

Animal Justice - 1