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

Bruins hold off the Kraken

The verdict · stolen

The Bruins stole one. They lost the expected-goals battle 3.86–2.36 and won anyway.

SEA 2 · BOS 4
◆ By the ModelJul 12, 12:56 AMxG: 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 won 4–2 despite controlling just 38% of expected goals. Superior goaltending and Seattle's inability to finish decided the game.

The xG split was 2.36 for Boston, 3.86 for Seattle. At 5v5, Seattle commanded 62% of the expected-goal share. The Bruins scored two goals from low-danger spots—exactly the kind of chances an opposing goalie needs to stop. J. Swayman made 26 saves on 28 shots, stopping 1.86 goals above expected. That's not luck; that's theft.

Boston's scoring model was rush-heavy: three goals on 19 rush chances, an elite conversion rate that masks a deeper problem. Outside the rush, the Bruins shot into a storm—just 24 shot attempts to Seattle's 28—and the danger levels didn't match their finish. The Kraken created four rebound opportunities, converting one, which suggests a team that understood how to generate second chances. They just couldn't put them away.

For Seattle, J. Daccord stopped 20 of 23 shots but underperformed his expected total by 0.64 goals. High-danger chances finished even at 3–3, meaning Seattle did the difficult work and got nothing for it. Their power play was the only outlier: 2 goals on 18 shots, with 1.95 xG—genuine dominance rendered meaningless in a loss.

The breakdown in twelve frames

Swipe it

Every number is from this page
Final · Jan 15
SEA
2
BOS
4

Bruins hold off the Kraken

Chances 3.9 – 2.4Did they deserve it? →
Did they deserve it?

The Kraken deserved better.

Expected goals · chance value
SEA
3.86
BOS
2.36
62% of the chances38%

The board read SEA 2, BOS 4. The chances read SEA 3.9, BOS 2.4.

Our xG model · NHL play-by-play · all situations
Luck check
BOS
+1.6
goals above expected
BOS2.36 expected · 4 scored
Expected
Scored
SEA3.86 expected · 2 scored
Expected
Scored

The Bruins scored 1.6 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 00:54BOSM. Khusnutdinov0–1
  2. P1 03:45BOSV. Arvidsson0–2
  3. P1 07:29SEAC. StephensonPP1–2
  4. P2 04:40BOSM. KastelicSH1–3
  5. P2 12:27SEAE. TolvanenPP2–3
  6. P3 19:45BOSD. PastrnakEN2–4
NHL play-by-play · chance value from our xG model
Where the shots came from
SEA
42 shots
2
Final
75 shots
BOS
33 shots
4
SEA attackBOS attack
SEA BOS Goal
42
shots · 2 in
33
shots · 4 in
Every unblocked shot · press play to replay it
Chances by danger
SEABOS
0 / 3
0.65 xG
High danger
2 / 3
1.04 xG
2 / 22
2.68 xG
Medium
0 / 8
0.71 xG
0 / 37
0.53 xG
Low
2 / 37
0.60 xG

The Kraken went 0 for 3 from the slot.

Danger tiers by our xG model · high ≥ 20% chance
In the net
A
J. Swayman
+1.9
BOS · 26/28
D
J. Daccord
−0.6
SEA · 20/23
The numbers, checked
BACKCHECK

Bruins hold off the Kraken

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 11–6
  1. 00:54BOSM. Khusnutdinov(C. McAvoy)0–1
  2. 03:45BOSV. Arvidsson(P. Zacha, C. Mittelstadt)0–2
  3. 07:29SEAC. Stephensonpower play(J. McCann, V. Dunn)1–2
2ndshots 7–7
  1. 04:40BOSM. Kastelicshorthanded1–3
  2. 12:27SEAE. Tolvanenpower play(B. Montour, K. Kakko)2–3
3rdshots 10–11
  1. 19:45BOSD. Pastrnakempty net(M. Geekie, C. McAvoy)2–4

score reads SEA–BOS

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

The numbers

XGBoost xG · NHL play-by-play
2.36
BOS chances
Goals their shots were worth
+1.6
Finishing
Goals above what those chances were worth
1.051
BOS puck luck
Above 1.000 — the bounces went their way
43.6%
Shot attempts
Under half — they were outshot
Split by club

Who controlled the game

3.86Expected goals2.36
SEA 62% of the chance quality
28Shots on goal24
3High-danger chances3
62All attempts (Corsi)48
Adjusted for score: SEA 61% · BOS 39%
Faceoffs · BOS won50%off50%neu58%def
Source · NHL play-by-play · XGBoost xG
How the game was won

The danger ladder

shotsgoalsexpected
High dangerslot & crease
SEA0 / 3 · 0.65 xG
BOS2 / 3 · 1.04 xG
Medium dangermid-range
SEA2 / 22 · 2.68 xG
BOS0 / 8 · 0.71 xG
Low dangerperimeter & point
SEA0 / 37 · 0.53 xG
BOS2 / 37 · 0.60 xG

BOS went 2-for-37 from low danger on 0.60 expected goals — 1.4 above expected.

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

Finishing vs expected

expectedactual
SEA
2 G · 3.86 xG · -1.9
BOS
4 G · 2.36 xG · +1.6
012345

SEA finished -1.9 against expected, BOS +1.6.

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

Shot diet

goalsshots
SEA
SNAP0/14
SLAP0/11
TIP IN1/11
WRIST1/3
BACKHAND0/2
DEFLECTED0/0
BAT0/1
OTHER0/20
BOS
SNAP0/12
SLAP0/5
TIP IN0/2
WRIST1/8
BACKHAND2/4
DEFLECTED1/2
BAT0/0
OTHER0/15
SEA
BOS
Off the rush
1 G on 26
2.72 xG
3 G on 19
1.28 xG
Off rebounds
1 G on 4
0.48 xG
0 G on 1
0.11 xG

Snap shots carried the volume: SEA went 0-for-14, BOS 0-for-12. 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. Daccord
SEA · 20/23 · .870
-0.6
saved above expected
D
the night
By dangerG/attxGsaved
High danger2/31.0-1.0
Medium0/80.7+0.7
Low2/370.6-1.4

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. Swayman
BOS · 26/28 · .929
+1.9
saved above expected
A
the night
By dangerG/attxGsaved
High danger0/30.7+0.7
Medium2/222.7+0.7
Low0/370.5+0.5

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

75 shots · press play to watch the game back

Where the shots came from

NHL play-by-play coordinates
SEA
42 shots
2
Final
75 shots
BOS
33 shots
4
SEA attackBOS attack
SEA BOS Goal

Each club shoots toward its own end — SEA 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
C. McAvoy
#73 · D · BOS
0 G · 2 A · 0 SOG · 28:00 on ice · +3
V. Dunn
#29 · D · SEA
0 G · 1 A · 1 SOG · 25:47 on ice · -1
B. Montour
#62 · D · SEA
0 G · 1 A · 4 SOG · 25:03 on ice
Ranked from the box score — points first · Backcheck
What the model said beforehand

Before the game

Written Thu, Jan 15
Open the pre-game read
Written from the numbers

The read

Edited for clarity
◆ By the ModelJul 12, 1:15 AMEdited 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 projects a 2.4–2.6 expected-goal game with the Bruins at 53% win probability. This is about as close to a pick'em as you'll find.

Boston's territorial edge is substantial: 49.0% Corsi to Seattle's 45.0%. That creates offensive volume. But underlying shot quality is nearly identical—Seattle's 46.0% xG% sits a point behind Boston's 47.0%, so the Kraken can win if they finish their chances.

The Bruins are running hot on conversion. Their 1.023 PDO indicates unsustainable finish; Seattle's 1.011 is near average. In a tight game, regression odds favor Seattle.

Viktor Arvidsson drives Boston's offense: 1.04 xG/60 with 18 goals and 13.0% shooting, elite on volume and finishing. Tanner Jeannot supplies secondary punch at 0.75 xG/60, 6 goals, 8.3% shooting. Seattle counters with Shane Wright (0.77 xG/60, 8 goals, 10.4% shooting) and Berkly Catton (0.68 xG/60, 6 goals, 8.8% shooting). The scoring talent is leveled.

Defensively, Chandler Stephenson is Seattle's weak link; Elias Lindholm is Boston's. Neither team is scoring from high danger—both at 0% high-danger goal rate—so this comes down to goaltending luck.

J. Swayman faces a back-to-back. If he plays tired, Seattle improves. If Boston uses a backup, Seattle must capitalize.

This is a coin flip. The Bruins' 53% edge is real but razor-thin.

What the model said beforehand

The model's lean

BOS 53%
53%
BOS
Model favorite
47%
53%
SEA50BOS

BOS by 6 points of win probability — a modest lean. Projected score SEA 2.4–2.6 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
SEA← edge
edge →BOS
46.0%47.0%
45.0%49.0%
2.132.39
2.512.67
1.872.22
1.951.82
1.0111.023

BOS holds 5 of 6 process categories — and the luck row (1.011 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
SEA
7-1-2
+14 GD · 2d rest
BOS
6-3-1
+9 GD · 1d rest
1.011
SEA PDO
Luck gauge · drifts to 1.000
1.023
BOS PDO
Luck gauge · drifts to 1.000
What decides it

Keys to the game

Where the edges live
  • The Bruins drive Corsi at 49.0% — expect territorial tilt.
Regression watch
  • The Bruins' PDO is 1.023 — running hot, expect some regression.
Things to watch
  • The Bruins drive Corsi at 49.0% — expect territorial tilt.
  • J. Swayman is on a back-to-back — watch for a backup start or a tired starter.
  • The Bruins' PDO is 1.023 — running hot, expect some regression.
Last game's lineup · confirmed at warm-up

Lineups

NHL box score
SEA
Expected in goal
P. Grubauer
2 days rest.909 last start
Backup Joey Daccord · -6.2 GSAx this season

No completed game on file for this club yet.

BOS
Expected in goal
J. Swayman
back-to-back1.000 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
SEA
Shane Wright8G 10A
0.77 xG/60 · 4 HD · 10.4% sh
Berkly Catton6G 8A
0.68 xG/60 · 5 HD · 8.8% 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