Motion-blurred skater in a Buffalo Sabres sweater
Breakdown · NYI at BUF

A. Lyon stands tall as the Sabres edge the Islanders

The verdict · coin flip

The Sabres won a genuine coin flip — neither side controlled the run of play.

NYI 2 · BUF 3
◆ By the ModelJul 11, 9:09 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

The Islanders generated high-danger chances at nearly double the rate of the Sabres in regulation, yet Buffalo pulled out a 3-2 shootout victory—a reversal that pins the result on A. Lyon's performance. The Sabres' goalie posted a 0.941 save percentage with 2.58 goals saved above expected, then watched Josh Norris end it with a shootout wrist shot from the slot.

Expected goals essentially split the difference at 4.64–4.58 for the Sabres, a dead-even underlying picture. High-danger chances painted the opposite frame: the Islanders generated 10 to Buffalo's 7. D. Rittich stopped all seven of the Sabres' premium looks with perfect technique, yet Buffalo still escaped with the win.

The Sabres' offensive futility nearly cost them. They went 0 for 7 on high-danger chances—a wasteful inefficiency that would normally be fatal. Their conversion came through transition instead: 2 goals on 35 rush chances, an outlet they executed when pace mattered most. Buffalo held 48% of shot attempts, a competitive advantage that evaporated when high-danger looks arrived.

A. Lyon finished with 32 saves on 34 shots, positioning himself as the game's decisive factor. D. Rittich was nearly identical at 0.938 SV% (30 saves on 32), proof that the gap came not from goaltending but from execution. Both stopped more than they should have by the numbers—Lyon saved 2.58 goals above expected, Rittich matched that at 2.64—yet the Sabres' extra run stopped scoring chances at the margins.

Both teams underperformed their expected-goals marks, the Islanders by 2.58 and Buffalo by 1.64. That variance suggests luck shaped the scoreboard as much as skill. The Islanders created more quality but couldn't finish. The Sabres finished when they had to, and A. Lyon remained flawless when regulation ended, leaving New York chasing a result the underlying numbers suggested they deserved more than the final score.

The breakdown in twelve frames

Swipe it

Every number is from this page
Final · SO · Dec 20
NYI
2
BUF
3

A. Lyon stands tall as the Sabres edge the Islanders

Chances 4.6 – 4.6Did they deserve it? →
Did they deserve it?

Dead even on chances. The Sabres took it anyway.

Expected goals · chance value
NYI
4.58
BUF
4.64
50% of the chances50%

The board read NYI 2, BUF 3. The chances read NYI 4.6, BUF 4.6.

Our xG model · NHL play-by-play · all situations
Luck check
BUF
−1.6
goals above expected
BUF4.64 expected · 3 scored
Expected
Scored
NYI4.58 expected · 2 scored
Expected
Scored

The Islanders left 2.6 goals on the table against what their chances were worth.

PDO = sh% + sv% · drifts to 1.000 over a season
Every goal, in order
  1. P1 01:47BUFR. DahlinPP0–1
  2. P2 08:55BUFT. Thompson0–2
  3. P2 19:37NYIM. Barzal1–2
  4. P3 19:31NYIE. HeinemanPP2–2
  5. SO 00:00NYIM. BarzalPP2–2
  6. SO 00:00BUFJ. QuinnPP2–2
  7. SO 00:00BUFJ. NorrisPP2–2
NHL play-by-play · chance value from our xG model
Where the shots came from
NYI
58 shots
3
Final
110 shots
BUF
52 shots
4
NYI attackBUF attack
NYI BUF Goal

Shootout goals are not shots and are not drawn; the scoreboard above counts goals from the shot log.

58
shots · 3 in
52
shots · 4 in
Every unblocked shot · press play to replay it
Chances by danger
NYIBUF
1 / 10
2.50 xG
High danger
0 / 7
2.23 xG
1 / 14
1.41 xG
Medium
2 / 15
1.67 xG
0 / 42
0.67 xG
Low
0 / 34
0.74 xG

High-danger looks: NYI 1 of 10, BUF 0 of 7.

Danger tiers by our xG model · high ≥ 20% chance
In the net
A+
D. Rittich
+2.6
NYI · 30/32
A+
A. Lyon
+2.6
BUF · 32/34
The numbers, checked
BACKCHECK

A. Lyon stands tall as the Sabres edge the Islanders

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 7–12
  1. 01:47BUFR. Dahlinpower play(A. Lyon)0–1
2ndshots 15–10
  1. 08:55BUFT. Thompson(J. Doan, P. Krebs)0–2
  2. 19:37NYIM. Barzal(A. Lee, S. Holmstrom)1–2
3rdshots 7–7
  1. 19:31NYIE. Heinemanpower play(M. Barzal, M. Schaefer)2–2
OTshots 5–3no goals
    SO
    1. 00:00NYIM. Barzalpower play2–2
    2. 00:00BUFJ. Quinnpower play2–2
    3. 00:00BUFJ. Norrispower play2–2

    score reads NYI–BUF

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

    The numbers

    XGBoost xG · NHL play-by-play
    4.64
    BUF chances
    Goals their shots were worth
    −1.6
    Finishing
    Goals below what those chances were worth
    1.005
    BUF puck luck
    About 1.000 — a normal night for bounces
    45.9%
    Shot attempts
    Under half — they were outshot
    Split by club

    Who controlled the game

    4.58Expected goals4.64
    BUF 50% of the chance quality
    34Shots on goal32
    10High-danger chances7
    66All attempts (Corsi)56
    Adjusted for score: NYI 58% · BUF 42%
    Faceoffs · BUF won48%off44%neu42%def
    Source · NHL play-by-play · XGBoost xG
    How the game was won

    The danger ladder

    shotsgoalsexpected
    High dangerslot & crease
    NYI1 / 10 · 2.50 xG
    BUF0 / 7 · 2.23 xG
    Medium dangermid-range
    NYI1 / 14 · 1.41 xG
    BUF2 / 15 · 1.67 xG
    Low dangerperimeter & point
    NYI0 / 42 · 0.67 xG
    BUF0 / 34 · 0.74 xG

    BUF went 0-for-7 from high danger on 2.23 expected goals — 2.2 left on the table.

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

    Finishing vs expected

    expectedactual
    NYI
    2 G · 4.58 xG · -2.6
    BUF
    3 G · 4.64 xG · -1.6
    012345

    NYI finished -2.6 against expected, BUF -1.6.

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

    Shot diet

    goalsshots
    NYI
    WRIST1/30
    SLAP0/6
    TIP IN0/6
    SNAP1/8
    BACKHAND0/2
    DEFLECTED0/1
    OTHER0/13
    BUF
    WRIST0/30
    SLAP0/6
    TIP IN0/5
    SNAP0/3
    BACKHAND2/3
    DEFLECTED0/0
    OTHER0/9
    NYI
    BUF
    Off the rush
    1 G on 31
    2.96 xG
    2 G on 35
    3.25 xG
    Off rebounds
    1 G on 4
    0.68 xG
    0 G on 1
    0.17 xG

    Wrist shots carried the volume: NYI went 1-for-30, BUF 0-for-30. BUF 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
    D. Rittich
    NYI · 30/32 · .938
    +2.6
    saved above expected
    A+
    the night
    By dangerG/attxGsaved
    High danger0/72.2+2.2
    Medium2/151.7-0.3
    Low0/340.7+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

    A. Lyon
    BUF · 32/34 · .941
    +2.6
    saved above expected
    A+
    the night
    By dangerG/attxGsaved
    High danger1/102.5+1.5
    Medium1/141.4+0.4
    Low0/420.7+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

    110 shots · press play to watch the game back

    Where the shots came from

    NHL play-by-play coordinates
    NYI
    58 shots
    3
    Final
    110 shots
    BUF
    52 shots
    4
    NYI attackBUF attack
    NYI BUF Goal

    Shootout goals are not shots and are not drawn; the scoreboard above counts goals from the shot log.

    Each club shoots toward its own end — NYI left, BUF 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. Barzal
    #13 · C · NYI
    1 G · 1 A · 4 SOG · 23:33 on ice · +1
    R. Dahlin
    #26 · D · BUF
    1 G · 0 A · 5 SOG · 25:52 on ice · +1
    M. Schaefer
    #48 · D · NYI
    0 G · 1 A · 3 SOG · 23:36 on ice · -1
    Ranked from the box score — points first · Backcheck
    What the model said beforehand

    Before the game

    Written Sat, Dec 20
    Open the pre-game read
    Written from the numbers

    The read

    Edited for clarity
    ◆ By the ModelJul 11, 9:14 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 gives Buffalo a 54% win probability with a projected 2.5–2.8 goal advantage—genuine parity. The underlying metrics confirm it: Islanders at 48.0% expected-goal share, Sabres at 50.0%, with both teams matching at 49.0% Corsi. Buffalo's 1.020 PDO runs hot; expect some regression.

    New York enters fresher—three days of rest to Buffalo's one. The Sabres' goaltending adds uncertainty: A. Lyon is on a back-to-back, so watch for either a backup start or a tired starter.

    Anders Lee is New York's offensive engine. At 1.20 expected goals per 60, his volume is the highest on either side. His 9 goals come on a 6.4% shooting rate; two landed on high-danger chances. Bo Horvat generates 0.87 xG/60 but converts at 12.8%—different profiles, same threat.

    Jason Zucker poses Buffalo's sharpest edge. He's at 1.07 xG/60 with six high-danger goals already, the truest measure of clinical finishing. Josh Doan (1.01 xG/60, 15 goals, 11.5% shooting) sits in that same band: lower volume, higher conversion. Neither will flood the scoresheet, but both capitalize on mistakes.

    The structural issue for New York: it can't generate goals off rebounds. If Lee and Horvat are blanketed, there's no secondary scoring. Alexander Romanov becomes the weak link defensively—every clearing attempt counts. Buffalo faces the same offensive constraint but has Jack Quinn's gaps on the back end to exploit instead.

    A single power-play goal or defensive breakdown will swing this. The 54% for Buffalo reflects that knife's edge.

    What the model said beforehand

    The model's lean

    BUF 54%
    54%
    BUF
    Model favorite
    46%
    54%
    NYI50BUF

    BUF by 8 points of win probability — a modest lean. Projected score NYI 2.5–2.8 BUF; 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
    NYI← edge
    edge →BUF
    48.0%50.0%
    49.0%49.0%
    2.482.55
    2.692.55
    1.782.35
    1.941.90
    0.9931.020

    BUF holds 6 of 6 process categories — and the luck row (0.993 vs 1.020) says BUF has been getting the bounces, which tends not to last.

    Source · NHL stats API + our xG · 5v5
    Form · Last 10
    NYI
    6-3-1
    +3 GD · 3d rest
    BUF
    6-4-0
    -3 GD · 1d rest
    0.993
    NYI PDO
    Luck gauge · drifts to 1.000
    1.020
    BUF PDO
    Luck gauge · drifts to 1.000
    What decides it

    Keys to the game

    Regression watch
    • The Sabres' PDO is 1.020 — running hot, expect some regression.
    Things to watch
    • A. Lyon is on a back-to-back — watch for a backup start or a tired starter.
    • The Sabres' PDO is 1.020 — running hot, expect some regression.
    • The Islanders have 2 more days of rest.
    Last game's lineup · confirmed at warm-up

    Lineups

    NHL box score
    NYI
    Expected in goal
    I. Sorokin
    3 days rest.857 last start
    Backup Ilya Sorokin · +25.3 GSAx this season

    No completed game on file for this club yet.

    BUF
    Expected in goal
    A. Lyon
    back-to-back.889 last start
    Backup Ukko-Pekka Luukkonen · +10.5 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
    NYI
    Anders Lee9G 20A
    1.20 xG/60 · 2 HD · 6.4% sh
    Bo Horvat18G 10A
    0.87 xG/60 · 3 HD · 12.8% sh
    BUF
    Jason Zucker14G 14A
    1.07 xG/60 · 6 HD · 15.1% sh
    Josh Doan15G 18A
    1.01 xG/60 · 2 HD · 11.5% sh
    Keep going

    Where to next