Motion-blurred skater in a Colorado Avalanche sweater
Breakdown · BOS at COL

Avalanche run the Bruins off the ice on the underlying numbers

The verdict · earned

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

BOS 1 · COL 4
◆ By the ModelJun 16, 3:03 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

Colorado's 4–1 victory was built on dominance that even the scoreline understated. At 5v5, they controlled 78% of expected goals (4.41–1.24), a gulf that rendered the three-goal margin almost incidental.

The underlying metrics confirmed the gap at every level. Shot attempts favored Colorado 73% (38–14). High-danger chances were unilateral: six for Colorado, zero for Boston. Where Boston's J. Swayman earned some credit—he stopped 1.4 goals above expected with a 0.919 save percentage on 34 of 37 shots—the deficit was too vast to overcome.

Colorado's shot quality was the separator. Per-attempt, Colorado generated 0.050 expected goals while Boston managed 0.032. Two of Colorado's four goals came from low-danger spots, the kind an opposing goaltender should routinely convert to saves. Colorado's S. Wedgewood needed only to be present (13/14, 0.929 SV%), and he was.

The tone was set early. Martin Necas's wrist shot from the top of the circles at 17:23 of the third period, with Boston already drowning, crystallized Colorado's control. Colorado converted at an extraordinary rate in transition: two goals on 33 rush attempts. Three rebound opportunities generated, zero converted, though the point was already proved—Colorado was crashing the net with surgical intent. Boston never mounted a sustained threat.

The breakdown in twelve frames

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Every number is from this page
Final · Oct 18
BOS
1
COL
4

Avalanche run the Bruins off the ice on the underlying numbers

Chances 1.2 – 4.4Did they deserve it? →
Did they deserve it?

The Avalanche earned this one.

Expected goals · chance value
BOS
1.24
COL
4.41
22% of the chances78%

The board read BOS 1, COL 4. The chances read BOS 1.2, COL 4.4.

Our xG model · NHL play-by-play · all situations
Luck check
COL
−0.4
goals above expected
COL4.41 expected · 4 scored
Expected
Scored
BOS1.24 expected · 1 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 03:11BOSJ. Beecher1–0
  2. P1 07:08COLN. MacKinnon1–1
  3. P1 10:22COLJ. Manson1–2
  4. P3 04:14COLN. MacKinnon1–3
  5. P3 17:23COLM. NecasEN1–4
NHL play-by-play · chance value from our xG model
Where the shots came from
BOS
21 shots
1
Final
80 shots
COL
59 shots
4
BOS attackCOL attack
BOS COL Goal
21
shots · 1 in
59
shots · 4 in
Every unblocked shot · press play to replay it
Chances by danger
BOSCOL
0 / 0
0.00 xG
High danger
1 / 6
1.76 xG
0 / 7
0.87 xG
Medium
1 / 16
1.62 xG
1 / 32
0.37 xG
Low
2 / 66
1.03 xG

High-danger looks: BOS 0 of 0, COL 1 of 6.

Danger tiers by our xG model · high ≥ 20% chance
In the net
B+
J. Swayman
+1.4
BOS · 34/37
C
S. Wedgewood
+0.2
COL · 13/14
The numbers, checked
BACKCHECK

Avalanche 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 7–7
  1. 03:11BOSJ. Beecher(C. McAvoy, M. Lohrei)1–0
  2. 07:08COLN. MacKinnon(A. Lehkonen)1–1
  3. 10:22COLJ. Manson(B. Burns, G. Landeskog)1–2
2ndshots 2–16no goals
    3rdshots 5–15
    1. 04:14COLN. MacKinnon(A. Lehkonen)1–3
    2. 17:23COLM. Necasempty net(A. Lehkonen)1–4

    score reads BOS–COL

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

    The numbers

    XGBoost xG · NHL play-by-play
    4.41
    COL chances
    Goals their shots were worth
    −0.4
    Finishing
    Goals below what those chances were worth
    1.020
    COL puck luck
    About 1.000 — a normal night for bounces
    69.3%
    Shot attempts
    Over half — they had the puck more
    Split by club

    Who controlled the game

    1.24Expected goals4.41
    COL 78% of the chance quality
    14Shots on goal38
    0High-danger chances6
    39All attempts (Corsi)88
    Adjusted for score: BOS 35% · COL 65%
    Faceoffs · COL won65%off37%neu13%def
    Source · NHL play-by-play · XGBoost xG
    How the game was won

    The danger ladder

    shotsgoalsexpected
    High dangerslot & crease
    BOS0 / 0 · 0.00 xG
    COL1 / 6 · 1.76 xG
    Medium dangermid-range
    BOS0 / 7 · 0.87 xG
    COL1 / 16 · 1.62 xG
    Low dangerperimeter & point
    BOS1 / 32 · 0.37 xG
    COL2 / 66 · 1.03 xG

    COL went 2-for-66 from low danger on 1.03 expected goals — 1.0 above expected.

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

    Finishing vs expected

    expectedactual
    BOS
    1 G · 1.24 xG · -0.2
    COL
    4 G · 4.41 xG · -0.4
    012345

    BOS finished -0.2 against expected, COL -0.4.

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

    Shot diet

    goalsshots
    BOS
    WRIST0/15
    TIP IN1/3
    SLAP0/1
    SNAP0/0
    BACKHAND0/2
    BAT0/0
    POKE0/0
    OTHER0/18
    COL
    WRIST1/31
    TIP IN0/7
    SLAP2/7
    SNAP0/8
    BACKHAND1/3
    BAT0/2
    POKE0/1
    OTHER0/29
    BOS
    COL
    Off the rush
    1 G on 9
    0.80 xG
    2 G on 33
    2.89 xG
    Off rebounds
    0 G on 1
    0.05 xG
    0 G on 3
    0.40 xG

    Wrist shots carried the volume: BOS went 0-for-15, COL 1-for-31. COL scored 2 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 · 34/37 · .919
    +1.4
    saved above expected
    B+
    the night
    By dangerG/attxGsaved
    High danger1/61.8+0.8
    Medium1/161.6+0.6
    Low2/661.0-1.0

    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

    S. Wedgewood
    COL · 13/14 · .929
    +0.2
    saved above expected
    C
    the night
    By dangerG/attxGsaved
    Medium0/70.9+0.9
    Low1/320.4-0.6

    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

    80 shots · press play to watch the game back

    Where the shots came from

    NHL play-by-play coordinates
    BOS
    21 shots
    1
    Final
    80 shots
    COL
    59 shots
    4
    BOS attackCOL attack
    BOS COL Goal

    Each club shoots toward its own end — BOS left, COL 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
    A. Lehkonen
    #62 · L · COL
    0 G · 3 A · 3 SOG · 17:58 on ice · +3
    N. MacKinnon
    #29 · C · COL
    2 G · 0 A · 8 SOG · 23:17 on ice · +3
    M. Necas
    #88 · C · COL
    1 G · 0 A · 5 SOG · 21:24 on ice · +3
    Ranked from the box score — points first · Backcheck
    What the model said beforehand

    Before the game

    Written Sat, Oct 18
    Open the pre-game read
    Written from the numbers

    The read

    Model draft
    ◆ By the ModelSep 22, 3:03 AMRaw model copyDrafted from NHL play-by-play by Backcheck's model. Nobody at Backcheck was at the rink. How this works

    The model projects a BOS 2.9 - 3.7 COL game with the Avalanche at 62% win probability.

    Keys to the game

    • Artturi Lehkonen drives the Avalanche offense. Artturi Lehkonen: 18G 22A, 1.11 xG/60, 6 high-danger goals.
    • Shutdown Assignment: Avalanche. Key matchup: Neutralize Viktor Arvidsson (18G, 1.04 xG/60, 2 HD goals)
    • Shutdown Assignment: Bruins. Key matchup: Neutralize Artturi Lehkonen (18G, 1.11 xG/60, 6 HD goals)

    Season 5v5 Numbers

    MetricBOSCOL
    xG%46.7%56.6%
    Corsi%49.0%56.4%
    PDO1.0221.021

    Rates from 2025-26 — the 2026-27 sample isn't live yet.

    Where the Edges Live

    • The Avalanche own the underlying play — 56.6% 5v5 xG vs 46.7%.
    • The Avalanche drive Corsi at 56.4% — expect territorial tilt.

    Regression Watch

    • The Avalanche's PDO is 1.021 — running hot, expect some regression.
    • The Bruins' PDO is 1.022 — running hot, expect some regression.

    Players to Watch

    BOS

    • Viktor Arvidsson — 1.04 xG/60, 18G 24A, 2 HD goals, 13.0% shooting
    • Tanner Jeannot — 0.75 xG/60, 6G 14A, 2 HD goals, 8.3% shooting

    COL

    • Artturi Lehkonen — 1.11 xG/60, 18G 22A, 6 HD goals, 14.9% shooting
    • Ross Colton — 1.10 xG/60, 7G 15A, 1 HD goals, 4.9% shooting

    Key Matchups

    BOS

    • Key matchup: Neutralize Viktor Arvidsson (18G, 1.04 xG/60, 2 HD goals)
    • Watch Tanner Jeannot (6G, 8.3% shooting)

    COL

    • Key matchup: Neutralize Artturi Lehkonen (18G, 1.11 xG/60, 6 HD goals)
    • Watch Ross Colton (7G, 4.9% shooting)

    Tactical Notes

    • BOS: 0% HD goal rate, 0% rebound goal rate
    • BOS defensive weak link: Elias Lindholm
    • COL: 0% HD goal rate, 0% rebound goal rate
    • COL defensive weak link: Nazem Kadri

    Data: NHL API, Backcheck xG model

    What the model said beforehand

    The model's lean

    COL 62%
    62%
    COL
    Model favorite
    38%
    62%
    BOS50COL

    COL by 24 points of win probability — a clear lean. Projected score BOS 2.9–3.7 COL; 15% 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 →COL
    46.7%56.6%
    49.0%56.4%
    2.973.59
    3.392.76
    3.273.63
    3.012.40
    1.0221.021

    COL holds 6 of 6 process categories — and the luck row (1.022 vs 1.021) says BOS has been getting the bounces, which tends not to last.

    Source · NHL stats API + our xG · 5v5
    Form · No games yet
    BOS
    0-0-0
    +0 GD · 0d rest
    COL
    0-0-0
    +0 GD · 0d rest
    1.022
    BOS PDO
    Luck gauge · drifts to 1.000
    1.021
    COL PDO
    Luck gauge · drifts to 1.000
    What decides it

    Keys to the game

    TACTICALCOL

    Shutdown Assignment: Avalanche

    Key matchup: Neutralize Viktor Arvidsson (18G, 1.04 xG/60, 2 HD goals)

    Key matchup: Neutralize Viktor Arvidsson (18G, 1.04 xG/60, 2 HD goals)

    TACTICALBOS

    Shutdown Assignment: Bruins

    Key matchup: Neutralize Artturi Lehkonen (18G, 1.11 xG/60, 6 HD goals)

    Key matchup: Neutralize Artturi Lehkonen (18G, 1.11 xG/60, 6 HD goals)

    STRENGTHCOL

    Artturi Lehkonen drives the Avalanche offense

    Artturi Lehkonen: 18G 22A, 1.11 xG/60, 6 high-danger goals.

    WARNINGBOS

    Exploitable minutes: Elias Lindholm

    Elias Lindholm is on ice for 2.80 xGA/60 and 40 high-danger shots against this season.

    Hunt matchups against Elias Lindholm's shifts with the top line.

    Where the edges live
    • The Avalanche own the underlying play — 56.6% 5v5 xG vs 46.7%.
    • The Avalanche drive Corsi at 56.4% — expect territorial tilt.
    Regression watch
    • The Avalanche's PDO is 1.021 — running hot, expect some regression.
    • The Bruins' PDO is 1.022 — running hot, expect some regression.
    Things to watch
    • The Avalanche own the underlying play — 56.6% 5v5 xG vs 46.7%.
    • The Avalanche drive Corsi at 56.4% — expect territorial tilt.
    • The Avalanche's PDO is 1.021 — running hot, expect some regression.
    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
    COL
    Artturi Lehkonen18G 22A
    1.11 xG/60 · 6 HD · 14.9% sh
    Ross Colton7G 15A
    1.10 xG/60 · 1 HD · 4.9% sh
    Keep going

    Where to next