Diving into State of Origin 2020
We’re unusually late in the year to be talking Origin but to understate it completely, 2020 has been an unusual year.
I’ve tried analysing Origin using my slate of analytical tools in previous years (2018 and 2019) with mixed success. Taking those lessons on board, I’ve reworked some of the tools and we’ll look at this year’s series through these lenses:
- Elo ratings
- Venue records
If you just want to cut to the chase, my tips are the Blues for the men’s and Maroons for the women’s. Further, I expect that the ratings dip we saw through the finals will continue through the Origin series and we’ll be back to mid-week games by next winter. To keep broadcasters happy and make up for this year’s underperformance, any talk of standalone weekends will be quashed. It’ll be just like in the 80s, so that will keep the Daily Telegraph readers and ARLC chairman happy until they realise the futility of nostalgia, which will probably only happen on their deathbeds, if at all. It’s not like anyone wants to see New Zealand versus Tonga anyway.
I always said it would be stupid to do an Elo rating system for a three game per year series with only two teams contesting it but here we are.
New South Wales’ current rating is 1516 and Queensland’s 1483. On neutral ground, as in Adelaide, the Blues have a 55% probability of winning (equivalent to a one point margin). In Sydney for game 2, the Blues’ chances improve to 64% (3 points) and in Brisbane for game 3, the Maroons’ would be 54% favourites (1 point). Obviously, this will change as the games are played and ratings updated.
For the nerds, this system is margin-based (like Form Elo, we set a line based on pregame ratings and after the game, ratings go up for the team that beats the line) but with a low K-value (50) to make the series relatively slow moving. To maximise tips would require setting K at 225, which turns the ratings into chaos. As is, Elo has tipped the correct winner 53% of the time in the Origin era, which rises to 60% if we crank the K value up to 225. You could just tip against the winner of the last game or flip a coin for a similar success rate. We’re being descriptive, rather than predictive.
Home ground advantage and margin prediction factor is based on the whole history of interstate games, which the home team (excluding games at neutral venues) won 59% of the time by an average of 4.5 points. I had intended to generate these values on a decade-by-decade basis but there are several points in history where the away team had the advantage, which ruins the whole system. I say keep it simple.
Home ground advantage
You could do pretty well tipping Origin by simply tipping the home team. That strategy would have returned a 58% success rate over the last ten series.
Suncorp has long been a fortress for Queensland. Since 2010, the home ground advantage has been worth over ten points to the Maroons. Equally, but with far fewer games, the neutral venues have been considerably more accommodating to the Blues. Go figure. The Blues have an advantage of less than two points at ANZ Stadium but as the memory of Queensland’s golden age fades from memory, I would expect it to return to its long term advantage of approximately four points.
The advantage should be with New South Wales for games 1 and 2 and with Queensland in game 3.
I want to preface this section by saying that this is not really what the Taylor system for player ratings was designed for and that rugby league isn’t a sport where you could plug and play players and get 2 + 2 = 4, especially when you take a surplus of fullbacks and drop them into other parts of the back line. I get it, I really do, but we have to use the tools we have at our disposal.
With that in mind, I went back a looked at how the lineups from 2014 onwards would have been rated by Taylors.
For these charts, I have calculated each player’s TPR to that point in the season that the game was played and estimated the number of Taylors (xTy) they would produce at their listed position. I have also included the actual Taylors (Ty) generated by the player during the game. If you’re not interested in the detail, here’s a table summarising these charts.
The most obvious issue is that this method almost always tips New South Wales. The last six series have been split 9-9, so this may not be a great means of guessing who will win. However, the average projected Taylors per game is 865 Taylors and the average actual Taylors produced is also 865. This shows there is at least some internal consistency but we may be suffering at the hands of rugby league chaos which does not allow for nice, neat mathematical projections.
In reality, what happens is that the best players are selected from their club teams and, as there is considerable overlap between talent and production, we end up with a lot of highly productive players in too small a space. The way rugby league is actually played means that only so much can be done in a game and some players will not be as productive as they would in a club situation. Similarly, many players will be out of position and adjusting on the fly, rather than playing at their best.
Having said that, Origin produced 116 Taylors more than the typical NRL game did over the same period (749 Taylors per game). Origin means more football.
Interestingly, the Maroons have typically outperformed their projection by 20 Taylors per game. Mal Meninga was able to coax an additional 39 Taylors per game over the projections in 2014 and 2015, while Kevin Walters has only managed 13 from 2016 to 2019. New South Wales underperformed by 59 Taylors during Laurie Daley’s reign (2014 to 2017) but have outperformed by an average of 54 Taylors under Brad Fittler’s tenure (2018 and 2019). Some of those differences will be squad composition, self-belief and motivation and some of it will be coaching, although I wouldn’t care to speculate on the precise mix.
This all provides context for when we look at this fairly damning chart for game 1 of this year’s series.
[Correction: The tip should have read “New South Wales by 66%” but didn’t due to a calculation error. Still a big gap though.]
Irrespective of the merits of the tips, we haven’t seen on paper advantage like this in recent times and you would very likely have to go back to 1995 to find a similar chasm between the two sides. Famously, Queensland won that series in a clean sweep, which just goes to show that anything is possible, especially if your opposition thinks they’ve already got it won.
The most productive game in NRL history by Taylors was Souths stomping on the Roosters at the end of the 2020 regular season, which generated 1042 Taylors. Only game 1 of 2019 in Origin has exceeded that with 1049 Taylors. We are projecting 1023 Taylors for game 1 of 2020, the highest aggregate projection. Even with Vlandoball, that doesn’t leave a lot of room to exceed expectations. If one were to clutch at straws, it would be that Queensland have a lot more room to outperform, even if this is the highest projected output of a Maroons side since game 3, 2014.
Queensland may well alter this line-up before game day. Personally, I would have preferred to see Harry Grant at hooker. His .174 TPR would have added an additional 13 Taylors and closed 14% of the gap between the two states. However, the Maroons appear to be in big trouble with the wingers and centres chosen. In a normal year, a functional Corey Oates would add another 6 Taylors over Xavier Coates but unfortunately, Corey is broken. Valentine Holmes’ addition on the other side would be a similar improvement. Nonetheless, these changes would close the gap a little but does not eliminate it.
For New South Wales, it’s hard to imagine a better squad. Brad Fittler will get a lot of credit for his coaching genius when, in reality, he has a sizeable talent advantage to work with. Clint Gutherson, one of the better fullbacks in the game, does not seem suited to his responsibilities at centre, which could be an avenue that Origin Gagai exploits. Some of the forward selections seem a bit doughy, especially Jake Trbojevic at lock after the season he has had, but their Queensland counterparts aren’t rated much better.
We’ve already established that the Taylors lean NSW and Elo, until recently, loved Queensland, so we’re really only left with home ground advantage to separate the teams. It’s hardly a good or useful or robust system but since someone will inevitably ask for it, here’s what an Origin jury would have tipped.
Despite this, I’m inclined to agree with the Jury’s recommendation of the Blues. In fact, I voted that the Blues would clean sweep the series in the end of season fan poll. It would take an exceptional turnaround, not beyond the realms of possibility but very close to a miracle, for it to be any other way. Truly, this would be a fitting end for 2020.
At the risk of this being seen as a tack-on, the reality is that records of women’s interstate games is spotty and that 21 NRLW games over three years does not give us the kind of statistical sample size that suits the kind of analysis I want to do. We are, unfortunately, left with the eye test.
Idiots will tell you that women’s Origin should have been moved from North Sydney Oval to Bankwest for this year’s edition because, somehow in a series of only two teams, most commentators forgot about the second team. Fortunately, the NRL is not that silly and has forced the coward Blues to face a hostile crowd on the Sunshine Coast. That said, bigger idiots think the women’s game should be a curtain raiser to the men’s, ensuring the women never play in front of a decent crowd.
If Queensland win this, it would be their first official Origin win and first interstate win since 2014 (2015 was a draw, after winning fourteen in a row prior according to Wikipedia). The Maroons have closed the gap that existed in previous Origins. Ali Brigginshaw, rather than being slowed by age, has had her best season yet and with Tarryn Aitken serving in the halves and Tamika Upton at fullback, Queensland have a dynamic playmaking combination. Broncos trio Tallisha Harden, Annette Brander and shot putter Chelsea Lenarduzzi will run it up the middle to lay a platform. Letting go of the pre-NRLW stalwarts and focussing on the younger talent that has come through is going to help immensely. The key ingredients are there.
The Blues’ stars, particularly those at the Dragons, looked extremely lack lustre during the NRLW season. Maddie Studdon has been dropped, Sam Bremner has other commitments and Isabelle Kelly and Kezie Apps will carry injuries in to this game. As usual, keeping a lid on Jess Sergis will be key to getting the upper hand. Hannah Southwell and Millie Boyle are a strong pair to underpin the pack. Kylie Hilder didn’t play NRLW this year or last year and is 44 years old, so I’m not sure if her naming isn’t an error. In contrast, a stack of Roosters have been named and if they can retain their cohesion from the NRLW, they may well overcome any talent deficit.
If nothing else, the women’s game will be much closer than the men’s series and should be considerably more compelling. I’m tipping the Maroons.
Like the NRLW, women’s Origin is coming along in leaps and bounds. The end goal – however long it takes – will be to have a women’s competition and representative season that is equal to and independent of the men’s side of the game. That means not having women’s games as curtain raisers but as standalone events. It will take time for the audience to grow, and women’s standalone games will likely be at smaller venues in the immediate future, but the audience will come if the product remains entertaining and is given the nourishment it needs to grow.