Motion-blurred skater in a gold and black sweater
Breakdown · STL at BOS

Bruins pull away from the Blues

The verdict · stolen

The Bruins stole one. They lost the expected-goals battle 3.88–2.91 and won anyway.

STL 2 · BOS 5
◆ By the ModelJul 11, 6:51 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

Boston's 5-2 victory disguises a 57-43 control problem. The Blues dominated expected goals 3.88–2.91, yet left empty-handed because the Bruins' finishing and goaltending overwhelmed statistical probability.

The gap started in net. J. Korpisalo stopped 1.88 goals above expected; J. Binnington surrendered 2.09 below. That swing alone accounts for the scoreboard's lie. The Bruins took just 27 shots to St. Louis's 39, and converted 5 high-danger chances to the Blues's 7. By every measure of volume and quality, Boston was outworked. By the goal column, they were not.

Pius Suter's wrist shot from the doorstep (third period, 09:07) epitomized the evening—a low-probability finish executed at the moment it mattered. The Bruins won the rush battle 3 goals on 19 chances; the Blues squandered 9 rebound opportunities for nothing. Crashing the net only counts if you can finish.

  • M. Geekie — 1 goal, 2 assists in 16:42
  • E. Lindholm — 3 assists in 15:37
  • A. Steeves — 1 goal, 1 assist in 16:06

For St. Louis, the loss stings because the underlying play was there. The Blues controlled 57% of expected goals at 5v5 and had more high-danger chances. Underperforming expected goals by 1.88 is not sloppy execution—it's a magnitude of bad luck or goaltending that turns a play-in win into a blowout loss.

Boston rode variance to victory. Whether that variance was elite finishing or fortunate bouncing, the scoreboard read only one way: Bruins 5, Blues 2.

The breakdown in twelve frames

Swipe it

Every number is from this page
Final · Dec 4
STL
2
BOS
5

Bruins pull away from the Blues

Chances 3.9 – 2.9Did they deserve it? →
Did they deserve it?

The Blues deserved better.

Expected goals · chance value
STL
3.88
BOS
2.91
57% of the chances43%

The board read STL 2, BOS 5. The chances read STL 3.9, BOS 2.9.

Our xG model · NHL play-by-play · all situations
Luck check
BOS
+2.1
goals above expected
BOS2.91 expected · 5 scored
Expected
Scored
STL3.88 expected · 2 scored
Expected
Scored

The Bruins scored 2.1 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 06:30BOSA. Steeves0–1
  2. P1 11:25BOSM. Geekie0–2
  3. P2 01:59STLP. Buchnevich1–2
  4. P2 06:04BOSV. Arvidsson1–3
  5. P2 12:26BOSP. Zacha1–4
  6. P2 19:59BOSP. ZachaPP1–5
  7. P3 09:07STLP. Suter2–5
NHL play-by-play · chance value from our xG model
Where the shots came from
STL
58 shots
2
Final
94 shots
BOS
36 shots
5
STL attackBOS attack
STL BOS Goal
58
shots · 2 in
36
shots · 5 in
Every unblocked shot · press play to replay it
Chances by danger
STLBOS
1 / 7
1.59 xG
High danger
1 / 5
1.27 xG
1 / 16
1.61 xG
Medium
3 / 10
1.07 xG
0 / 47
0.69 xG
Low
1 / 29
0.57 xG

High-danger looks: STL 1 of 7, BOS 1 of 5.

Danger tiers by our xG model · high ≥ 20% chance
In the net
A
J. Korpisalo
+1.9
BOS · 37/39
F
J. Binnington
−2.1
STL · 22/27
The numbers, checked
BACKCHECK

Bruins pull away from the Blues

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 10–14
  1. 06:30BOSA. Steeves(M. Geekie, E. Lindholm)0–1
  2. 11:25BOSM. Geekie(E. Lindholm, A. Steeves)0–2
2ndshots 15–8
  1. 01:59STLP. Buchnevich(C. Parayko)1–2
  2. 06:04BOSV. Arvidsson(M. Lohrei)1–3
  3. 12:26BOSP. Zacha(V. Arvidsson, M. Lohrei)1–4
  4. 19:59BOSP. Zachapower play(E. Lindholm, M. Geekie)1–5
3rdshots 14–5
  1. 09:07STLP. Suter(D. Holloway, J. Kyrou)2–5

score reads STL–BOS

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

The numbers

XGBoost xG · NHL play-by-play
2.91
BOS chances
Goals their shots were worth
+2.1
Finishing
Goals above what those chances were worth
1.085
BOS puck luck
Above 1.000 — the bounces went their way
38.6%
Shot attempts
Under half — they were outshot
Split by club

Who controlled the game

3.88Expected goals2.91
STL 57% of the chance quality
39Shots on goal27
7High-danger chances5
70All attempts (Corsi)44
Adjusted for score: STL 67% · BOS 33%
Faceoffs · BOS won41%off33%neu68%def
Source · NHL play-by-play · XGBoost xG
How the game was won

The danger ladder

shotsgoalsexpected
High dangerslot & crease
STL1 / 7 · 1.59 xG
BOS1 / 5 · 1.27 xG
Medium dangermid-range
STL1 / 16 · 1.61 xG
BOS3 / 10 · 1.07 xG
Low dangerperimeter & point
STL0 / 47 · 0.69 xG
BOS1 / 29 · 0.57 xG

BOS went 3-for-10 from medium danger on 1.07 expected goals — 1.9 above expected.

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

Finishing vs expected

expectedactual
STL
2 G · 3.88 xG · -1.9
BOS
5 G · 2.91 xG · +2.1
0123456

STL finished -1.9 against expected, BOS +2.1.

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

Shot diet

goalsshots
STL
WRIST1/12
SNAP1/28
SLAP0/9
BACKHAND0/6
TIP IN0/2
WRAP AROUND0/1
OTHER0/12
BOS
WRIST2/22
SNAP2/4
SLAP1/7
BACKHAND0/2
TIP IN0/0
WRAP AROUND0/1
OTHER0/8
STL
BOS
Off the rush
1 G on 29
2.03 xG
3 G on 19
1.46 xG
Off rebounds
0 G on 9
1.28 xG
1 G on 5
1.00 xG

Wrist shots carried the volume: STL went 1-for-12, BOS 2-for-22. BOS scored 3 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
J. Binnington
STL · 22/27 · .815
-2.1
saved above expected
F
the night
By dangerG/attxGsaved
High danger1/51.3+0.3
Medium3/101.1-1.9
Low1/290.6-0.4

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

J. Korpisalo
BOS · 37/39 · .949
+1.9
saved above expected
A
the night
By dangerG/attxGsaved
High danger1/71.6+0.6
Medium1/161.6+0.6
Low0/470.7+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

94 shots · press play to watch the game back

Where the shots came from

NHL play-by-play coordinates
STL
58 shots
2
Final
94 shots
BOS
36 shots
5
STL attackBOS attack
STL BOS Goal

Each club shoots toward its own end — STL left, BOS 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. Geekie
#39 · C · BOS
1 G · 2 A · 3 SOG · 16:42 on ice · +2
E. Lindholm
#28 · C · BOS
0 G · 3 A · 0 SOG · 15:37 on ice · +1
A. Steeves
#21 · C · BOS
1 G · 1 A · 2 SOG · 16:06 on ice · +2
Ranked from the box score — points first · Backcheck
What the model said beforehand

Before the game

Written Thu, Dec 4
Open the pre-game read
Written from the numbers

The read

Edited for clarity
◆ By the ModelJul 11, 6:50 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 calls it a draw: 2.5 goals each, the Bruins at exactly 50% win probability. There is no lean.

Both teams are underwater in goal differential: St. Louis at -8 over its last 10, Boston at -7. Recent form is nearly indistinguishable.

The underlying metrics split evenly. St. Louis leads in expected goals (49.0% xG%) but trails in shot attempts (48.0% Corsi%). Boston flips: 47.0% xG%, 49.0% Corsi%. Neither has seized control.

Boston's singular advantage is PDO — a 1.023 indicates conversion at an unsustainable pace. Regression awaits. St. Louis sits at 1.000.

Offensively, Viktor Arvidsson drives Boston: 1.04 xG per 60 minutes, 18 goals at a 13.0% shooting rate. St. Louis counters with Jimmy Snuggerud (0.86 xG/60, 15 goals, 11.9% shooting) and Dylan Holloway (0.82 xG/60, 13 goals, 10.8% shooting). Tanner Jeannot (0.75 xG/60, 6 goals) provides secondary punch for Boston.

Defensively, both expose vulnerabilities: St. Louis around Jimmy Snuggerud, Boston around Elias Lindholm. In goal, J. Swayman faces a back-to-back for Boston — load matters.

This close to even, a coin flip is the honest read.

What the model said beforehand

The model's lean

BOS 50%
50%
BOS
Model favorite
50%
50%
STL50BOS

BOS by 0 points of win probability — effectively a coin flip. Projected score STL 2.5–2.5 BOS; 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
STL← edge
edge →BOS
49.0%47.0%
48.0%49.0%
2.342.39
2.402.67
2.002.22
2.121.82
1.0001.023

BOS holds 4 of 6 process categories — and the luck row (1.000 vs 1.023) says BOS has been getting the bounces, which tends not to last.

Source · NHL stats API + our xG · 5v5
Form · Last 10
STL
3-3-4
-8 GD · 2d rest
BOS
4-6-0
-7 GD · 1d rest
1.000
STL PDO
Luck gauge · drifts to 1.000
1.023
BOS PDO
Luck gauge · drifts to 1.000
What decides it

Keys to the game

Regression watch
  • The Bruins' PDO is 1.023 — running hot, expect some regression.
Things to watch
  • J. Swayman is on a back-to-back — watch for a backup start or a tired starter.
  • The Bruins are underwater at -7 goal differential over their last 10.
  • The Blues are underwater at -8 goal differential over their last 10.
  • The Bruins' PDO is 1.023 — running hot, expect some regression.
Last game's lineup · confirmed at warm-up

Lineups

NHL box score
STL
Expected in goal
J. Hofer
2 days rest.950 last start
Backup Joel Hofer · +11.7 GSAx this season

No completed game on file for this club yet.

BOS
Expected in goal
J. Swayman
back-to-back.783 last start
Backup Jeremy Swayman · +28.8 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
STL
Jimmy Snuggerud15G 22A
0.86 xG/60 · 2 HD · 11.9% sh
Dylan Holloway13G 24A
0.82 xG/60 · 1 HD · 10.8% sh
BOS
Viktor Arvidsson18G 24A
1.04 xG/60 · 2 HD · 13.0% sh
Tanner Jeannot6G 14A
0.75 xG/60 · 2 HD · 8.3% sh
Keep going

Where to next