Motion-blurred skater in a green sweater
Breakdown · BOS at DAL

Stars run the Bruins off the ice on the underlying numbers

The verdict · earned

The Stars earned it — the game and the expected-goals battle both.

BOS 2 · DAL 6
◆ By the ModelJul 12, 1:54 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

Dallas dominated on every underlying metric and then some. The Stars controlled 67% of shot attempts (37–18) and 62% of expected goals (3.50–2.18), which checks out for a 6-2 win. What deserves emphasis: they outscored their xG by 2.50 goals, suggesting elite conversion or fortunate bounces—or both.

The Stars' shot-attempt dominance didn't fully explain the scoreline. The 62% xG split is the tighter metric, yet Dallas won by four. High-danger chances (5–3) told a similar story of relative parity masking a larger result.

J. Oettinger (16/18 saves, 0.889 SV%) was composed in the Dallas net. Boston's goaltending was the real story. J. Swayman made 28/34 saves but gave up 2.8 goals more than expected—a significant underperformance on his workload. J. Korpisalo (3/3 saves) barely saw the ice.

What actually drove the margin? Dallas was ruthless in transition. The Stars scored three goals on 34 rush chances—high-volume, high-efficiency. Boston also thrived on the rush (2 goals on 19 chances), but couldn't match Dallas's execution. Dallas crashed the net effectively, generating five rebound opportunities and converting two.

The high-danger divergence is instructive: Swayman faced five HD shots and denied all five (1.000 SV%), yet the Stars still won by four. Dallas simply had more ways to score. They registered three low-danger goals—the kind opposing goaltenders are supposed to stop—and Swayman couldn't. That's the bridge between "underlying control" and "6-2 scoreline."

The breakdown in twelve frames

Swipe it

Every number is from this page
Final · Jan 20
BOS
2
DAL
6

Stars run the Bruins off the ice on the underlying numbers

Chances 2.2 – 3.5Did they deserve it? →
Did they deserve it?

The Stars earned this one.

Expected goals · chance value
BOS
2.18
DAL
3.50
38% of the chances62%

The board read BOS 2, DAL 6. The chances read BOS 2.2, DAL 3.5.

Our xG model · NHL play-by-play · all situations
Luck check
DAL
+2.5
goals above expected
DAL3.50 expected · 6 scored
Expected
Scored
BOS2.18 expected · 2 scored
Expected
Scored

The Stars scored 2.5 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 16:08DALW. JohnstonPP0–1
  2. P1 19:47DALM. BourquePP0–2
  3. P2 08:26DALE. Lindell0–3
  4. P2 19:29DALJ. Hryckowian0–4
  5. P3 03:15DALJ. Robertson0–5
  6. P3 06:37DALJ. Robertson0–6
  7. P3 12:11BOSM. GeekiePP1–6
+1 more on the full breakdown
NHL play-by-play · chance value from our xG model
Where the shots came from
BOS
30 shots
2
Final
81 shots
DAL
51 shots
6
BOS attackDAL attack
BOS DAL Goal
30
shots · 2 in
51
shots · 6 in
Every unblocked shot · press play to replay it
Chances by danger
BOSDAL
0 / 3
0.78 xG
High danger
0 / 5
1.20 xG
2 / 8
0.94 xG
Medium
3 / 17
1.65 xG
0 / 32
0.45 xG
Low
3 / 47
0.66 xG

The Bruins went 0 for 3 from the slot.

Danger tiers by our xG model · high ≥ 20% chance
In the net
A+
J. Korpisalo
+3.5
BOS · 3/3
C
J. Oettinger
+0.2
DAL · 16/18
+1 more on the full breakdown
The numbers, checked
BACKCHECK

Stars run the Bruins off the ice on the underlying numbers

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 6–15
  1. 16:08DALW. Johnstonpower play(R. Hintz, M. Heiskanen)0–1
  2. 19:47DALM. Bourquepower play(T. Harley, J. Hryckowian)0–2
2ndshots 5–17
  1. 08:26DALE. Lindell(M. Heiskanen, J. Hryckowian)0–3
  2. 19:29DALJ. Hryckowian(T. Harley)0–4
3rdshots 7–5
  1. 03:15DALJ. Robertson(M. Heiskanen, R. Hintz)0–5
  2. 06:37DALJ. Robertson(M. Bourque, R. Faksa)0–6
  3. 12:11BOSM. Geekiepower play(D. Pastrnak, E. Lindholm)1–6
  4. 15:39BOSF. Minten(N. Zadorov)2–6

score reads BOS–DAL

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

The numbers

XGBoost xG · NHL play-by-play
3.50
DAL chances
Goals their shots were worth
+2.5
Finishing
Goals above what those chances were worth
1.040
DAL puck luck
Above 1.000 — the bounces went their way
61.6%
Shot attempts
Over half — they had the puck more
Split by club

Who controlled the game

2.18Expected goals3.50
DAL 62% of the chance quality
18Shots on goal37
3High-danger chances5
43All attempts (Corsi)69
Adjusted for score: BOS 44% · DAL 56%
Faceoffs · DAL won74%off69%neu47%def
Source · NHL play-by-play · XGBoost xG
How the game was won

The danger ladder

shotsgoalsexpected
High dangerslot & crease
BOS0 / 3 · 0.78 xG
DAL0 / 5 · 1.20 xG
Medium dangermid-range
BOS2 / 8 · 0.94 xG
DAL3 / 17 · 1.65 xG
Low dangerperimeter & point
BOS0 / 32 · 0.45 xG
DAL3 / 47 · 0.66 xG

DAL went 3-for-47 from low danger on 0.66 expected goals — 2.3 above expected.

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

Finishing vs expected

expectedactual
BOS
2 G · 2.18 xG · -0.2
DAL
6 G · 3.50 xG · +2.5
01234567

BOS finished -0.2 against expected, DAL +2.5.

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

Shot diet

goalsshots
BOS
SNAP0/8
WRIST0/9
SLAP0/4
BACKHAND1/2
TIP IN1/5
DEFLECTED0/1
WRAP AROUND0/1
OTHER0/13
DAL
SNAP3/28
WRIST0/7
SLAP1/4
BACKHAND0/5
TIP IN0/2
DEFLECTED1/4
WRAP AROUND1/1
OTHER0/18
BOS
DAL
Off the rush
2 G on 19
1.83 xG
3 G on 34
2.71 xG
Off rebounds
0 G on 0
0.00 xG
2 G on 5
0.53 xG

Snap shots carried the volume: BOS went 0-for-8, DAL 3-for-28. DAL 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. Swayman
BOS · 28/34 · .824
-2.5
saved above expected
F
the night
By dangerG/attxGsaved
High danger0/51.2+1.2
Medium3/171.6-1.4
Low3/470.7-2.3

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 · 3/3 · 1.000
+3.5
saved above expected
A+
the night
By dangerG/attxGsaved
High danger0/51.2+1.2
Medium3/171.6-1.4
Low3/470.7-2.3

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. Oettinger
DAL · 16/18 · .889
+0.2
saved above expected
C
the night
By dangerG/attxGsaved
High danger0/30.8+0.8
Medium2/80.9-1.1
Low0/320.5+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

81 shots · press play to watch the game back

Where the shots came from

NHL play-by-play coordinates
BOS
30 shots
2
Final
81 shots
DAL
51 shots
6
BOS attackDAL attack
BOS DAL Goal

Each club shoots toward its own end — BOS left, DAL 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. Heiskanen
#4 · D · DAL
0 G · 3 A · 1 SOG · 21:52 on ice · +2
J. Hryckowian
#49 · C · DAL
1 G · 2 A · 3 SOG · 14:31 on ice · +2
T. Harley
#55 · D · DAL
0 G · 2 A · 2 SOG · 23:08 on ice · +1
Ranked from the box score — points first · Backcheck
What the model said beforehand

Before the game

Written Tue, Jan 20
Open the pre-game read
Written from the numbers

The read

Edited for clarity
◆ By the ModelJul 12, 1:51 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

Dallas owns this matchup at the underlying level. The model projects a 2.3–2.6 game with the Stars at 55% win probability, tilted toward them because they carry the advantage where it matters most: 51.0% 5v5 expected goals versus Boston's 47.0%.

The Bruins, though, have recent results on their side. They are 8-1-1 in their last 10 games, pacing the faster clip by points. The Stars sit underwater at −10 in goal differential over the same stretch, a gap that suggests regression pressure in both directions—and that's before accounting for the PDO risk that dogs both teams.

Both Boston (1.023) and Dallas (1.024) are running hot on PDO. Boston's Corsi sits at 49.0%, just above Dallas's 47.0%—marginal control either way. The Bruins' recent win rate is a product of efficiency, which regresses. The Stars hold the xG edge and structural advantage; if play holds, their regression should sting less.

Viktor Arvidsson is Boston's primary weapon at 1.04 xG per 60 with 18 goals and 24 assists on a 13.0% shooting rate. Tanner Jeannot (0.75 xG/60, 6 goals, 14 assists) operates at lower volume; his depressed 8.3% shooting suggests modest upside.

Jason Robertson carries the Stars' offense at 0.96 xG per 60 with 25 goals and 21 assists, converting at 12.4%. Michael Bunting (0.83 xG/60, 8 goals, 14 assists) labors under a 7.6% shooting rate, leaving room for positive variance if his luck normalizes.

Elias Lindholm and Tyler Myers are the defensive weak links for their respective teams. Neither team generates secondary scoring—both sit at 0% in high-danger and rebound goal rates—which tightens the path to goals and raises the volatility of any offensive output.

What the model said beforehand

The model's lean

DAL 55%
55%
DAL
Model favorite
45%
55%
BOS50DAL

DAL by 10 points of win probability — a modest lean. Projected score BOS 2.3–2.6 DAL; 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
BOS← edge
edge →DAL
47.0%51.0%
49.0%47.0%
2.392.36
2.672.29
2.222.07
1.821.68
1.0231.024

The season numbers split 3–3 — no clear process edge — and the luck row (1.023 vs 1.024) says DAL has been getting the bounces, which tends not to last.

Source · NHL stats API + our xG · 5v5
Form · Last 10
BOS
8-1-1
+21 GD · 2d rest
DAL
2-6-2
-10 GD · 2d rest
1.023
BOS PDO
Luck gauge · drifts to 1.000
1.024
DAL PDO
Luck gauge · drifts to 1.000
What decides it

Keys to the game

Where the edges live
  • The Stars own the underlying play — 51.0% 5v5 xG vs 47.0%.
Regression watch
  • The Stars' PDO is 1.024 — running hot, expect some regression.
  • The Bruins' PDO is 1.023 — running hot, expect some regression.
Things to watch
  • The Stars own the underlying play — 51.0% 5v5 xG vs 47.0%.
  • The Bruins are the hotter team by points pace (8-1-1 in their last 10).
  • The Stars are underwater at -10 goal differential over their last 10.
  • The Stars' PDO is 1.024 — running hot, expect some regression.
Last game's lineup · confirmed at warm-up

Lineups

NHL box score
BOS
Expected in goal
J. Korpisalo
2 days rest.917 last start
Backup Jeremy Swayman · +28.8 GSAx this season

No completed game on file for this club yet.

DAL
Expected in goal
J. Oettinger
2 days rest.880 last start
Backup Jake Oettinger · +5.7 GSAx this season

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
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
DAL
Jason Robertson25G 21A
0.96 xG/60 · 2 HD · 12.4% sh
Michael Bunting8G 14A
0.83 xG/60 · 0 HD · 7.6% sh
Keep going

Where to next