NRL | Round 12

alphr.com.au

SYD
Roosters
VS
CRO
Sharks
POLYTEC STADIUM, GOSFORD • SATURDAY 24 MAY, 7:35 PM

Win Probability

AI Game Review

Roosters defied the model's 64% prediction for Sharks, a notable upset. The margin model missed here, predicting 4.8 but the actual margin was 26 points. Roosters led 20–6 at the break and pulled away in the second half to win by 26. The model went 1/3 on this match. The over 44.5 total call was correct.

Model vs actual outcomes • Post-match analysis

🏁

AI Referee Insights

Grant Atkins officiated this match (318 career games). The combined score of 58 points was 15 points above Grant Atkins's career average of 43. Roosters's victory aligns with Grant Atkins's historical trend, Roosters have a 63% win rate under this referee. Grant Atkins averaged 14.4 penalties per game heading in, a whistle-heavy referee profile.

Based on referee career statistics • Post-match analysis

Momentum Replay
Beta
80', Roosters firmly in control (99%)
ROO42
99%80'1%
16SHA
HT100%50%0%0'20'40'60'80'
Sharks momentumMomentum +22Roosters momentum →
Next Try (within 10 min)
AI Model
88% none
ROO 6%No try 88%SHA 6%
Biggest Swings

AI Win Probability

64%SharksFavourite

Roosters

36%

Sharks

64%

AI Match Overview

Sharks hold the advantage at 64% win probability, though Roosters are far from out of this at 36%. The model sees Sharks ahead on 3 of 7 key factors including ELO Difference, Forward Pack and Recent Win Rate. Sharks carry a 123-point ELO rating advantage (1609 vs 1486). Recent form favours Sharks with 4 wins from their last 5 compared to 3 for Roosters. The margin model predicts Sharks by 4.8 points with a combined total of 51.

Generated from model features • Pre-kick-off analysis

Edge Analysis

1 ACTIVE EDGE

Each market is predicted by an independent model, H2H, margin, and totals may occasionally disagree.

H2H Recommendation

Sharks to Win @1.50

Lost ✗

Edge

-12.4%

Line / Spread

Sharks +8.5 @1.91

Lost ✗

Edge

-12.4%

Total Points

Over 44.5 @1.91

Winner ✓

Edge

+19.3%

Form & History

TeamLast 5Avg Pts
Roosters
W
W
W
L
L
28.0
Sharks
W
W
W
W
L
28.2

Avg Conceded

24.8

Roosters

18.4

Sharks

Avg Margin

3.2

Roosters

9.8

Sharks

Run Metres

1673

Roosters

1744

Sharks

Line Breaks

5.8

Roosters

4.2

Sharks

Referee Indicator

Favours Roosters

Grant Atkins

318 career games · since 2013

AI Analysis

Win rate when Grant Atkins refs each team (vs any opponent)

Roosters
35W – 21L
63%
Sharks
17W – 15L
53%

Roosters hold a 10-point edge: 35W–21L (63%) vs Sharks's 17W–15L (53%).

Avg Total

43.2 pts

Home Win %

54%

Home Bias

Leans home

Penalty & Discipline

Pen / Game

14.4

Sin Bins / Gm

0.29

SB Away %

56%

Avg Penalties Per Game

vs Home Teams6.8
vs Away Teams7.6

Penalty Advantage Under This Ref

Positive = opponent penalised more than your team

Roosters
+0.3
Sharks
-1.1

Grant Atkins averages 14.4 penalties per game, above the league norm. Expect frequent stoppages. Penalises away teams more, 6.8 against home vs 7.6 against away. Roosters get a +0.3 penalty advantage under Grant Atkins vs Sharks's -1.1.

H2H History (Last 5)Sharks lead 3-2
Apr 2026SYD 34 - 22 CRO
Sep 2025SYD 10 - 20 CRO
Jul 2025SYD 18 - 31 CRO
May 2024SYD 30 - 38 CRO
Sep 2023SYD 13 - 12 CRO
Prediction BreakdownPure Alpha Model

📊Team ELO Ratings

SYD
1486Overall1609
CRO
ELO difference: -123 in favour of Sharks

🏈Positional Matchups

Player ELO aggregated by position group, higher = stronger unit

939Forwards1094
Best: 1180CRO +154Best: 1320
1010Backs930
Best: 1102SYD +80Best: 1092
1185Halves1153
Best: 1185SYD +32Best: 1153
1000Hooker972
SYD +28

📈Recent Form (Last 5)

SYD
Stat
CRO
3.0
Wins (Last 5)
4.0
28.0pts
Avg Score
28.2pts
24.8pts
Avg Conceded
18.4pts
3.2pts
Avg Margin
9.8pts
1673.2m
Run Metres
1744.4m
5.8
Line Breaks
4.2
317.8
Tackles
318.0
13.0
Errors
11.0

🔑Key Prediction Factors

What the model weighted most in this prediction

1
ELO Difference14.0%
Sharks
2
Forward Pack12.0%
Sharks
3
Backline Quality10.0%
Roosters
4
Halves Control9.0%
Roosters
5
Recent Win Rate9.0%
Sharks
6
Referee Tendency7.0%
7
Venue Advantage7.0%

Model Confidence

64%

Sharks predicted to win by 5 points

Predicted total: 51 · Line: -4.8

1/3 match predictions correct
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