Motion-blurred skater in a Calgary Flames sweater
Breakdown · VGK at CGY

Flames pull away from the Golden Knights

The verdict · stolen

The Flames stole one. They lost the expected-goals battle 5.23–3.78 and won anyway.

VGK 3 · CGY 6
◆ By the ModelJul 11, 9:19 PMxG: xgboost-0.758Edited for clarityDrafted from NHL play-by-play by Backcheck's model, worded for clarity by an AI editor that may not change a number. Nobody at Backcheck was at the rink. How this works

Vegas controlled the play. Calgary controlled the scoreboard. The Flames won 6-3 despite the Golden Knights holding 58% of expected goals—a 16-point gap that flips on one number: D. Cooley stopped 2.23 goals above expected.

The story is clean. Vegas generated better chances (5.23 xG to 3.78), but Calgary converted theirs. In high-danger looks, the Flames buried three of six (50%) while Vegas managed zero of seven. One team finished. The other wasted.

The turning point arrived at 19:15 of the first period, when Jonathan Huberdeau's wrist shot from the high slot tilted the ice. By then, A. Schmid had already surrendered three goals on 25 shots—a 0.800 save percentage, 1.22 goals worse than expected.

Vegas's rush efficiency (three goals on 28 chances) matched Calgary's (four on 22). The difference was the net-front game. Calgary created four rebound opportunities and converted two. Vegas created nine and converted none—a chasm that exposes the gap between possession and finishing.

The variance cut both ways: Calgary overperformed its xG by 2.22 goals, Vegas underperformed by 2.23. But one team capitalized.

The breakdown in twelve frames

Swipe it

Every number is from this page
Final · Dec 20
VGK
3
CGY
6

Flames pull away from the Golden Knights

Chances 5.2 – 3.8Did they deserve it? →
Did they deserve it?

The Golden Knights deserved better.

Expected goals · chance value
VGK
5.23
CGY
3.78
58% of the chances42%

The board read VGK 3, CGY 6. The chances read VGK 5.2, CGY 3.8.

Our xG model · NHL play-by-play · all situations
Luck check
CGY
+2.2
goals above expected
CGY3.78 expected · 6 scored
Expected
Scored
VGK5.23 expected · 3 scored
Expected
Scored

The Flames scored 2.2 more than their chances were worth. That does not repeat.

PDO = sh% + sv% · drifts to 1.000 over a season
Every goal, in order
  1. P1 03:54CGYM. Backlund0–1
  2. P1 08:42CGYA. Klapka0–2
  3. P1 10:03VGKR. Smith1–2
  4. P1 15:45CGYR. Lomberg1–3
  5. P2 08:38CGYM. Backlund1–4
  6. P2 12:21CGYJ. FarabeeSH1–5
  7. P2 14:34VGKK. Korczak2–5
+2 more on the full breakdown
NHL play-by-play · chance value from our xG model
Where the shots came from
VGK
57 shots
3
Final
99 shots
CGY
42 shots
6
VGK attackCGY attack
VGK CGY Goal
57
shots · 3 in
42
shots · 6 in
Every unblocked shot · press play to replay it
Chances by danger
VGKCGY
0 / 7
2.05 xG
High danger
3 / 6
2.03 xG
3 / 21
2.49 xG
Medium
3 / 10
1.18 xG
0 / 43
0.69 xG
Low
0 / 39
0.58 xG

The Golden Knights went 0 for 7 from the slot.

Danger tiers by our xG model · high ≥ 20% chance
In the net
A
D. Cooley
+2.2
CGY · 34/37
D-
A. Schmid
−1.2
VGK · 20/25
The numbers, checked
BACKCHECK

Flames pull away from the Golden Knights

A model, not a newsroom. Every number on these frames comes from the NHL's play-by-play and our own models. Nothing was watched, guessed or heard from anyone.

Read the full breakdown
backcheckreport.com
01 / 08 · Final
Every goal, in order

How it happened

NHL play-by-play
1stshots 7–11
  1. 03:54CGYM. Backlund(B. Coleman, C. Zary)0–1
  2. 08:42CGYA. Klapka(Y. Kuznetsov, M. Weegar)0–2
  3. 10:03VGKR. Smith(M. Stone, Z. Whitecloud)1–2
  4. 15:45CGYR. Lomberg(C. Zary, J. Beecher)1–3
2ndshots 9–10
  1. 08:38CGYM. Backlund(M. Weegar, C. Zary)1–4
  2. 12:21CGYJ. Farabeeshorthanded(M. Weegar)1–5
  3. 14:34VGKK. Korczak(M. Marner, T. Hertl)2–5
3rdshots 21–5
  1. 16:03VGKM. Stonepower play(N. Hanifin, M. Marner)3–5
  2. 19:15CGYJ. Huberdeauempty net(M. Backlund, B. Coleman)3–6

score reads VGK–CGY

Source · NHL play-by-play (api-web.nhle.com)
Process vs result

The numbers

XGBoost xG · NHL play-by-play
3.78
CGY chances
Goals their shots were worth
+2.2
Finishing
Goals above what those chances were worth
1.067
CGY puck luck
Above 1.000 — the bounces went their way
43.7%
Shot attempts
Under half — they were outshot
Split by club

Who controlled the game

5.23Expected goals3.78
VGK 58% of the chance quality
37Shots on goal26
7High-danger chances6
71All attempts (Corsi)55
Adjusted for score: VGK 63% · CGY 37%
Faceoffs · CGY won33%off38%neu87%def
Source · NHL play-by-play · XGBoost xG
How the game was won

The danger ladder

shotsgoalsexpected
High dangerslot & crease
VGK0 / 7 · 2.05 xG
CGY3 / 6 · 2.03 xG
Medium dangermid-range
VGK3 / 21 · 2.49 xG
CGY3 / 10 · 1.18 xG
Low dangerperimeter & point
VGK0 / 43 · 0.69 xG
CGY0 / 39 · 0.58 xG

VGK went 0-for-7 from high danger on 2.05 expected goals — 2.0 left on the table.

Source · Backcheck xG model · NHL play-by-play
The luck layer

Finishing vs expected

expectedactual
VGK
3 G · 5.23 xG · -2.2
CGY
6 G · 3.78 xG · +2.2
01234567

VGK finished -2.2 against expected, CGY +2.2.

Source · Backcheck xG model
Shot types · rush and rebound chancesopen +
What they shot — and what went in

Shot diet

goalsshots
VGK
WRIST0/27
BACKHAND1/10
SLAP0/5
TIP IN0/3
SNAP1/6
BAT1/4
DEFLECTED0/1
WRAP AROUND0/1
OTHER0/14
CGY
WRIST3/25
BACKHAND1/2
SLAP0/5
TIP IN0/6
SNAP1/2
BAT0/0
DEFLECTED1/2
WRAP AROUND0/0
OTHER0/13
VGK
CGY
Off the rush
3 G on 28
2.96 xG
4 G on 22
2.80 xG
Off rebounds
0 G on 9
1.51 xG
2 G on 4
0.53 xG

Wrist shots carried the volume: VGK went 0-for-27, CGY 3-for-25. CGY scored 4 of theirs off the rush.

Source · Backcheck xG model · NHL shot types
New to these numbers?

Two things happened in this game: who created the better chances, and who put the puck in the net. They are not the same thing, and this page separates them on purpose.

The one to watch is expected goals— the best single read on who deserved to win. When it disagrees with the scoreboard, that disagreement is usually the story. Nothing here is a projection; every figure is computed from this game's play-by-play. Full glossary →

xG
Expected goals. Every shot scored by how often that exact look goes in. 2.5 xG means the chances were worth about two and a half goals.
HD
High-danger chances — shots from the slot and the crease, where shots actually become goals.
Corsi
Every shot attempt, including the ones that missed or got blocked. A rough read on who had the puck.
Adj.
Score-adjusted. Teams that trail shoot more and teams that lead sit back, so this corrects the attempt count for the scoreboard.
GSAx
Goals saved above expected. A positive number means the goalie stopped more than an average goalie would have on those shots.
PDO
Shooting % plus save % — a luck gauge. It sits near 1.000 over a season, so a game far from it usually means the bounces decided it.
Shot by shot

In the net

Graded on goals saved above expected
A. Schmid
VGK · 20/25 · .800
-1.2
saved above expected
D-
the night
By dangerG/attxGsaved
High danger3/62.0-1.0
Medium3/101.2-1.8
Low0/390.6+0.6

A+ ≥ +2.5 saved above expected · A ≥ +1.5 · B+ ≥ +0.75 · B ≥ +0.25 · C ≥ −0.25 · D ≥ −0.75 · F below −1.5

D. Cooley
CGY · 34/37 · .919
+2.2
saved above expected
A
the night
By dangerG/attxGsaved
High danger0/72.0+2.0
Medium3/212.5-0.5
Low0/430.7+0.7

A+ ≥ +2.5 saved above expected · A ≥ +1.5 · B+ ≥ +0.75 · B ≥ +0.25 · C ≥ −0.25 · D ≥ −0.75 · F below −1.5

99 shots · press play to watch the game back

Where the shots came from

NHL play-by-play coordinates
VGK
57 shots
3
Final
99 shots
CGY
42 shots
6
VGK attackCGY attack
VGK CGY Goal

Each club shoots toward its own end — VGK left, CGY right — the way you would watch it. A dot's size is how dangerous the look was, from distance and angle; it is a proxy for shot quality, not the xG model the article is written from. Hover a dot for the shooter and the clock.

Ranked from the box score

Three stars

Points first
Three stars · computed, not voted
M. Weegar
#52 · D · CGY
0 G · 3 A · 2 SOG · 22:51 on ice · +2
M. Backlund
#11 · C · CGY
2 G · 1 A · 5 SOG · 19:24 on ice · +2
C. Zary
#47 · C · CGY
0 G · 3 A · 1 SOG · 16:14 on ice · +2
Ranked from the box score — points first · Backcheck
What the model said beforehand

Before the game

Written Sat, Dec 20
Open the pre-game read
Written from the numbers

The read

Edited for clarity
◆ By the ModelJul 11, 9:18 PMEdited for clarityDrafted from NHL play-by-play by Backcheck's model, worded for clarity by an AI editor that may not change a number. Nobody at Backcheck was at the rink. How this works

The model gives the Golden Knights a 2.6-to-2.3 scoring edge with a 54% win probability. This is a pick'em in all but name.

Vegas owns the underlying play. At 54.0% 5v5 expected goals and 52.0% Corsi, the Golden Knights drive territorial control and generate chances at a genuine advantage. Calgary sits at 47.0% xG and 49.0% Corsi—a secondary team by both measures.

Both clubs are running cold. Vegas's 0.983 PDO and Calgary's 0.985 PDO suggest regression ahead for whichever team needs it more. If the Flames catch a bounce, they're closer to parity than the underlying numbers indicate. If Vegas's dominance converts, they pull away.

The goaltending adds uncertainty. D. Wolf faces a back-to-back, which may mean a backup start or a tired starter—a variable either way.

Offensively, Vegas centers on Brandon Saad and Tomas Hertl. Saad (0.91 xG/60, 3G 6A, 1 high-danger goal) shoots at 4.1%—suggesting his scoring will rise. Hertl (0.88 xG/60, 5G 17A, 1 high-danger goal) carries 4.3% shooting—steadier volume, similar underperformance room.

For Calgary, Blake Coleman is the core engine. At 0.89 xG/60 with 16 goals, 12 assists, and 2 high-danger goals, Coleman shoots at 11.4%, well above trend—he's due for regression. Matt Coronato adds 0.80 xG/60, 10 goals, and 16 assists at 6.6%, a secondary scorer with volume.

Defensively, Rasmus Andersson is Vegas's weak link. For Calgary, it's Coronato—an odd vulnerability since he's also an offensive contributor.

The better team on paper (Vegas) faces a club (Calgary) that could easily steal this one. Trust the model: pure coin flip.

What the model said beforehand

The model's lean

VGK 54%
54%
VGK
Model favorite
54%
46%
VGK50CGY

VGK by 8 points of win probability — a modest lean. Projected score VGK 2.6–2.3 CGY; 18% chance it's tied after 60.

Source · Backcheck Poisson projection · season scoring rates
Season rates · 5v5

Tale of the tape

NHL stats API · our xG
VGK← edge
edge →CGY
54.0%47.0%
52.0%49.0%
2.522.36
2.112.66
2.121.76
2.102.15
0.9830.985

VGK holds 6 of 6 process categories — and the luck row (0.983 vs 0.985) says CGY has been getting the bounces, which tends not to last.

Source · NHL stats API + our xG · 5v5
Form · Last 10
VGK
6-1-3
+2 GD · 2d rest
CGY
6-3-1
+4 GD · 1d rest
0.983
VGK PDO
Luck gauge · drifts to 1.000
0.985
CGY PDO
Luck gauge · drifts to 1.000
What decides it

Keys to the game

Where the edges live
  • The Golden Knights own the underlying play — 54.0% 5v5 xG vs 47.0%.
  • The Golden Knights drive Corsi at 52.0% — expect territorial tilt.
Regression watch
  • The Flames' PDO is 0.985 — running cold, due for positive regression.
  • The Golden Knights' PDO is 0.983 — running cold, due for positive regression.
Things to watch
  • The Golden Knights own the underlying play — 54.0% 5v5 xG vs 47.0%.
  • The Golden Knights drive Corsi at 52.0% — expect territorial tilt.
  • D. Wolf is on a back-to-back — watch for a backup start or a tired starter.
  • The Flames' PDO is 0.985 — running cold, due for positive regression.
Last game's lineup · confirmed at warm-up

Lineups

NHL box score
VGK
Expected in goal
C. Hart
2 days rest.970 last start
Backup Akira Schmid · -1.0 GSAx this season

No completed game on file for this club yet.

CGY
Expected in goal
D. Wolf
back-to-back.913 last start
Backup Dustin Wolf · -1.8 GSAx this season
Back-to-back: the backup often gets this one. Treat the starter as unconfirmed.

No completed game on file for this club yet.

Lineups are the players who dressed in each club's last game, with their minutes; clubs confirm tonight's at warm-up. Every player this preview names was in that lineup.

Computed danger · scouting

Players to watch

NHL stats API · our xG
VGK
Brandon Saad3G 6A
0.91 xG/60 · 1 HD · 4.1% sh
Tomas Hertl5G 17A
0.88 xG/60 · 1 HD · 4.3% sh
CGY
Blake Coleman16G 12A
0.89 xG/60 · 2 HD · 11.4% sh
Matt Coronato10G 16A
0.80 xG/60 · 0 HD · 6.6% sh
Keep going

Where to next