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

Bruins run the Canadiens off the ice on the underlying numbers

The verdict · earned

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

MTL 3 · BOS 4
◆ By the ModelJul 12, 2:37 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

The Bruins won 4-3, but the story was written in efficiency, not volume. Montreal fired 25 shots to Boston's 20—and lost. The real metric: the Bruins generated 60% of expected goals (5.00–3.30), a split that predicted the scoreline before the puck dropped.

Boston's 10 high-danger chances to Montreal's 4 shows the quality gap. The Canadiens generated better-looking chances relative to their shot volume, but positioning advantage didn't translate to points.

The Bruins underperformed their xG by 1.00 goals; they should have won 5-3. S. Montembeault bore responsibility, stopping 16 of 20 shots (0.800 SV%) while posting +1.00 above expected—elite goaltending in defeat. J. Swayman's 22 saves on 25 shots (0.880 SV%) was steady if unremarkable.

Montreal's power play should have won them the game: two goals on 15 PP shots, generating 1.53 xG. Boston's three power-play goals on 13 shots (2.44 xG) was better execution, but Montreal's volume went to waste.

The rush was a second story. Boston converted twice on 22 rush attempts; Montreal converted three on 27. Where Boston pulled ahead: rebound pursuit. The Bruins created five rebound chances and converted one; Montreal created three and converted none.

Morgan Geekie's slap shot from the top of the circles (14:07, third period) was the mechanical turning point—but the game was decided by chance quality and finishing efficiency.

The breakdown in twelve frames

Swipe it

Every number is from this page
Final · Jan 24
MTL
3
BOS
4

Bruins run the Canadiens off the ice on the underlying numbers

Chances 3.3 – 5.0Did they deserve it? →
Did they deserve it?

The Bruins earned this one.

Expected goals · chance value
MTL
3.30
BOS
5.00
40% of the chances60%

The board read MTL 3, BOS 4. The chances read MTL 3.3, BOS 5.0.

Our xG model · NHL play-by-play · all situations
Luck check
BOS
−1.0
goals above expected
BOS5.00 expected · 4 scored
Expected
Scored
MTL3.30 expected · 3 scored
Expected
Scored

Both sides finished close to what their chances were worth. This one was earned on the ice.

PDO = sh% + sv% · drifts to 1.000 over a season
Every goal, in order
  1. P1 06:36MTLC. Caufield1–0
  2. P2 01:45BOSV. ArvidssonPP1–1
  3. P2 07:37MTLC. CaufieldPP2–1
  4. P2 09:46BOSM. GeekiePP2–2
  5. P2 13:29MTLC. CaufieldPP3–2
  6. P3 13:55BOSF. Minten3–3
  7. P3 14:07BOSM. GeekiePP3–4
NHL play-by-play · chance value from our xG model
Where the shots came from
MTL
42 shots
3
Final
82 shots
BOS
40 shots
4
MTL attackBOS attack
MTL BOS Goal
42
shots · 3 in
40
shots · 4 in
Every unblocked shot · press play to replay it
Chances by danger
MTLBOS
0 / 4
0.87 xG
High danger
2 / 10
3.08 xG
1 / 15
1.78 xG
Medium
1 / 14
1.44 xG
2 / 38
0.65 xG
Low
1 / 27
0.47 xG

The Canadiens went 0 for 4 from the slot.

Danger tiers by our xG model · high ≥ 20% chance
In the net
B+
S. Montembeault
+1.0
MTL · 16/20
B
J. Swayman
+0.3
BOS · 22/25
The numbers, checked
BACKCHECK

Bruins run the Canadiens 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 7–2
  1. 06:36MTLC. Caufield(M. Matheson, J. Evans)1–0
2ndshots 9–11
  1. 01:45BOSV. Arvidssonpower play(F. Minten, C. Mittelstadt)1–1
  2. 07:37MTLC. Caufieldpower play(N. Suzuki, J. Slafkovský)2–1
  3. 09:46BOSM. Geekiepower play(D. Pastrnak, C. McAvoy)2–2
  4. 13:29MTLC. Caufieldpower play(N. Suzuki, L. Hutson)3–2
3rdshots 9–7
  1. 13:55BOSF. Minten(H. Lindholm, C. McAvoy)3–3
  2. 14:07BOSM. Geekiepower play(C. McAvoy, P. Zacha)3–4

score reads MTL–BOS

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

The numbers

XGBoost xG · NHL play-by-play
5.00
BOS chances
Goals their shots were worth
−1.0
Finishing
Goals below what those chances were worth
1.026
BOS puck luck
Above 1.000 — the bounces went their way
47.2%
Shot attempts
Under half — they were outshot
Split by club

Who controlled the game

3.30Expected goals5.00
BOS 60% of the chance quality
25Shots on goal20
4High-danger chances10
57All attempts (Corsi)51
Adjusted for score: MTL 51% · BOS 49%
Faceoffs · BOS won40%off52%neu60%def
Source · NHL play-by-play · XGBoost xG
How the game was won

The danger ladder

shotsgoalsexpected
High dangerslot & crease
MTL0 / 4 · 0.87 xG
BOS2 / 10 · 3.08 xG
Medium dangermid-range
MTL1 / 15 · 1.78 xG
BOS1 / 14 · 1.44 xG
Low dangerperimeter & point
MTL2 / 38 · 0.65 xG
BOS1 / 27 · 0.47 xG

MTL went 2-for-38 from low danger on 0.65 expected goals — 1.4 above expected.

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

Finishing vs expected

expectedactual
MTL
3 G · 3.30 xG · -0.3
BOS
4 G · 5.00 xG · -1.0
0123456

MTL finished -0.3 against expected, BOS -1.0.

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

Shot diet

goalsshots
MTL
SNAP1/24
WRIST1/2
TIP IN0/7
SLAP1/4
BACKHAND0/3
DEFLECTED0/1
BAT0/1
OTHER0/15
BOS
SNAP2/4
WRIST0/20
TIP IN0/6
SLAP1/6
BACKHAND1/4
DEFLECTED0/0
BAT0/0
OTHER0/11
MTL
BOS
Off the rush
3 G on 27
2.54 xG
2 G on 22
2.43 xG
Off rebounds
0 G on 3
0.34 xG
1 G on 5
1.53 xG

Snap shots carried the volume: MTL went 1-for-24, BOS 2-for-4. MTL 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
S. Montembeault
MTL · 16/20 · .800
+1.0
saved above expected
B+
the night
By dangerG/attxGsaved
High danger2/103.1+1.1
Medium1/141.4+0.4
Low1/270.5-0.5

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

J. Swayman
BOS · 22/25 · .880
+0.3
saved above expected
B
the night
By dangerG/attxGsaved
High danger0/40.9+0.9
Medium1/151.8+0.8
Low2/380.7-1.4

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

82 shots · press play to watch the game back

Where the shots came from

NHL play-by-play coordinates
MTL
42 shots
3
Final
82 shots
BOS
40 shots
4
MTL attackBOS attack
MTL BOS Goal

Each club shoots toward its own end — MTL 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 · 3 A · 0 SOG · 27:43 on ice · -1
C. Caufield
#13 · R · MTL
3 G · 0 A · 6 SOG · 19:14 on ice · +1
N. Suzuki
#14 · C · MTL
0 G · 2 A · 1 SOG · 21:25 on ice · +1
Ranked from the box score — points first · Backcheck
What the model said beforehand

Before the game

Written Sat, Jan 24
Open the pre-game read
Written from the numbers

The read

Edited for clarity
◆ By the ModelJul 12, 2:21 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 2.5–2.6 goal game with the Bruins at 52% win probability. This is about as close to a pick'em as the analytics will get.

Both teams are generating similar underlying chances. Montreal holds a 48.0% xG edge at 5v5, though neither team dominates possession — Corsi sits at 49.0% for both. The difference is negligible. What matters more is the PDO alarm: Boston is running at 1.023 and Montreal at 1.018, meaning both teams are converting at a clip that won't hold. Expect some regression from each side.

The goaltending matchup adds a layer of fatigue risk. J. Korpisalo is on a back-to-back for Boston, and S. Montembeault faces the same situation for Montreal. Whichever team sees a backup arrive, or whichever starter absorbs the second game with tired legs, could be vulnerable.

Montreal's offensive engine hinges on Cole Caufield, who is running a 20.0% shooting rate and has recorded 33 goals to go with 16 assists. He's generating 0.97 expected goals per 60 minutes — elite pace. The supporting cast matters: Oliver Kapanen is at 0.83 xG/60 with 19 goals and a 17.8% shooting rate, which is sustainable enough to make him a legitimate threat alongside Caufield. But Montreal's defensive weak link, Mike Matheson, will draw Boston's attention.

Boston leans on Viktor Arvidsson, who is running the highest expected goals rate here at 1.04 per 60. He's compiled 18 goals and 24 assists, meaning he's not just putting up empty xG — he's converting at a 13.0% rate. Tanner Jeannot (0.75 xG/60, 6 goals and 14 assists) is the secondary play, though his 8.3% shooting rate suggests he's due for positive regression if given opportunity. The Bruins will rely on Arvidsson's elite pace, but Montreal can target Elias Lindholm as a defensive weak link.

The real match will be penalty management and execution at even strength. Both teams are converting high-danger chances at similar rates, which means the edge often comes down to who avoids self-inflicted mistakes and who capitalizes on the softer chances. With both teams running hot on PDO, the law of averages favors the team that creates its own luck rather than riding it.

At 52% win probability, Boston is a modest favorite, but the gap is so thin that it's more a coin flip than a conviction. Montreal has the personnel to steal this, particularly if Caufield stays hot.

What the model said beforehand

The model's lean

BOS 52%
52%
BOS
Model favorite
48%
52%
MTL50BOS

BOS by 4 points of win probability — effectively a coin flip. Projected score MTL 2.5–2.6 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
MTL← edge
edge →BOS
48.0%47.0%
49.0%49.0%
2.412.39
2.622.67
2.242.22
1.961.82
1.0181.023

MTL holds 4 of 6 process categories — and the luck row (1.018 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
MTL
6-3-1
+4 GD · 1d rest
BOS
8-2-0
+15 GD · 1d rest
1.018
MTL 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.
  • The Canadiens' PDO is 1.018 — running hot, expect some regression.
Things to watch
  • J. Korpisalo is on a back-to-back — watch for a backup start or a tired starter.
  • S. Montembeault 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
MTL
Expected in goal
S. Montembeault
back-to-back.813 last start
Backup Jakub Dobes · +17.3 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.

BOS
Expected in goal
J. Korpisalo
back-to-back.909 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
MTL
Cole Caufield33G 16A
0.97 xG/60 · 1 HD · 20.0% sh
Oliver Kapanen19G 12A
0.83 xG/60 · 4 HD · 17.8% 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