3-2: Final 4OT (MTL). 75:33: OT length. +2.13 / +1.00: Desbiens / Philips GSAx. 65-56: Shots (OTT-MTL) Game 2 of the semifinal lasted seven periods, the second-longest game in PWHL history at the time. Total OT length: 75 minutes 33 seconds . Ottawa outshot Montreal 65 to 56 , outchanced them 4.13 xG to 4.00 , and finished at 58 percent Corsi . Both starting goaltenders went well above expectation. Catherine Dubois won it on a 0.10 xG wrister 15:33 into the fourth overtime period. Ottawa tied it with 42 seconds left Montreal led 2-0 after the second period: Kristin O'Neill on a 0.13 backhand 2:25 into the first, and Laura Stacey on a 0.04 wrister midway through the second. Ottawa pulled within one on a Aneta Tejralová 0.02 wrister at P3 15:26, then tied it on Brianne Jenner 's 0.07 snap shot at P3 19:18 (with 42 seconds left in regulation) . From the Tejralová goal to the Jenner equalizer was 3:52 of game time. From the Jenner equalizer to the Dubois winner was another 75:33. 75 minutes of overtime, no goal Across four overtime periods totaling roughly 75 minutes of additional play, no goal was scored until Dubois broke through 15:33 into OT4 . The biggest scoring chance of the entire 75-plus minutes wasn't the Dubois goal, it was Laura Stacey 's 0.34 xG wrister at OT2 12:23 ; it didn't go. Mannon McMahon 's 0.25 xG snap at OT4 12:23 was Ottawa's biggest OT look; it stayed out. Both goalies absorbed every dangerous chance the other side put together until Dubois found a finish in the kind of mid-quality range the model says scores about one in ten. Goaltending, decomposed Ann-Renée Desbiens faced 65 shots worth 4.13 xG , the largest single-game workload in this analysis stretch. She allowed two goals for +2.13 GSAx . That's save-process dramatically above expectation: 65 shots, 12 high-danger looks, two goals against. The Tejralová 0.02 and Jenner 0.07 wristers got through; every other Ottawa look stopped, including the 0.28 Tereza Vanišová chance at P3 14:26, the 0.25 McMahon OT snap, and the 0.20 Leslie backhand in the second period. Gwyneth Philips stopped 53 of 56 live shots worth 4.00 xG, finishing at +1.00 GSAx . Save-process well above expectation on a 56-shot workload that included nine high-danger chances and the Stacey 0.34 OT2 wrister. The three goals against her were a 0.13 O'Neill backhand, a 0.04 Stacey wrister, and the 0.10 Dubois OT winner. Her line in a losing effort across seven periods reads as one of the more impressive playoff goaltending performances the model has graded. Shots by period P1 : MTL 8, OTT 8. P2 : MTL 9, OTT 11. P3 : MTL 6, OTT 14. OT1 : MTL 7, OTT 11. OT2 : MTL 8, OTT 8. OT3 : MTL 8, OTT 5. OT4 : MTL 10, OTT 8 The game in cumulative xG The scoring timeline P1 2:25 · Kristin O'Neill · xG 0.12 · MTL 1, OTT 0. P2 8:35 · Laura Stacey · xG 0.03 · MTL 2, OTT 0. P3 15:26 · Aneta Tejralová · xG 0.02 · MTL 2, OTT 1. P3 19:18 · Brianne Jenner · xG 0.06 · MTL 2, OTT 2. P7 15:33 · Catherine Dubois (4OT) · xG 0.12 · MTL 3, OTT 2 Top scoring chances MTL 2OT 12:23 · Laura Stacey wrist · xG 0.37. MTL P2 10:36 · Lina Ljungblom wrist · xG 0.19. MTL P3 7:34 · Mikyla Grant-Mentis snap · xG 0.16. MTL 4OT 2:48 · Laura Stacey wrist · xG 0.16. MTL 2OT 5:34 · Catherine Dubois wrist · xG 0.15. MTL 3OT 2:28 · Laura Stacey snap · xG 0.15. OTT 4OT 12:23 · Mannon McMahon snap · xG 0.32. OTT P3 14:26 · Tereza Vanišová wrist · xG 0.26. OTT P2 9:19 · Rebecca Leslie backhand · xG 0.21. OTT OT 6:55 · Tereza Vanišová wrist · xG 0.17. OTT 2OT 11:45 · Tereza Vanišová tip · xG 0.16. OTT 3OT 17:31 · Kateřina Mrázová wrist · xG 0.15 What this read isn't Not a possession game lost on goaltending alone. Ottawa generated more chances and more shots, but Desbiens absorbed the volume. The save-process gap between the goalies (Desbiens +1.89, Philips +0.65) was the difference, but both were above expectation.. Not a single bad shift in OT. 75 minutes of sudden-death is too long to attribute the result to one defensive lapse. The Dubois shot was a clean mid-quality wrister; the model says shots like this score around one in ten, and one did.. Not a special-teams-driven game. Combined power-play results were 0-for-6. Both PP units generated some volume but no goals. The entire game was decided at 5-on-5.. Not a model failure. A 2-2 regulation game at 3.89 to 3.65 xG comfortably allows extended OT outcomes. The probability of any single OT shift producing a goal is small; the cumulative probability across 75 minutes lands somewhere; this time it landed on Dubois. Methodology xG model : PWHL-calibrated logistic regression on 16,709 non-EN shots. Same fit as the methodology post . Features: distance, angle, rebound (≤3 s), penalty shot, power play, overtime, scorer-tagged quality chance, seven shot-type dummies. Empty-net shots are priced outside the main model (MoneyPuck / NST convention).. GSAx : summed xG on shots faced minus goals allowed, computed per-goalie from the PBP feed. Empty-net shots and goals are excluded from both sides of the ledger. Overtime shots are included.. Numbers regenerate on every build. A PBP re-sync or xG recalibration reshapes every figure in this post on the next static export. Full play-by-play, shift overlays, and the per-player game log for this game are at /games/299 .