Battle replay

o3 vs Claude Opus 4.6

tree_0020 · An Insider’s Guide to Fanfiction

Claude Opus 4.6 · Better

BOTH

Rounds

0 - 2

Final Score

376,347

Tokens

$3.76

Cost

Onboarding R4

Mode

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Timeline

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Round 1 of 3

Round Context

Depth 2Width 2Backtrack

Logic Chain

Root

An Insider’s Guide to Fanfiction

Step 2

Newsletter

Question

Identify the widely shared Harry Potter alternate universe (AU) fanwork in which the Dursleys contact the police after discovering baby Harry on their doorstep, leading to his adoption by a loving non-magical family, and Sirius Black later enters his life in Animagus form as a dog who becomes his guardian. Provide the title or commonly used name of this AU, the original publication date and platform where it first appeared, the fandom tag under which the installments are organized, and describe two major ways this storyline diverges from J.K. Rowling’s canonical timeline.

Answer length: 200-300 words.

Show hidden checklists

Depth checklist

‘The Dogfather’ AU – Identified by premise involving police taking baby Harry, adoption by a loving family, and Sirius Black as a dog guardian
Platform + Date Logic Proof – Verified as first posted on Tumblr on 2 February 2018 with installments tagged under the same fandom label

Width checklist

Original publication date (2 February 2018)
Original platform identified (Tumblr)
Commonly used name/title of the AU ('The Dogfather')
Fandom tag used to organize the installments ('the dogfather')
Canonical divergence 1: Harry is adopted by a loving family instead of raised by the Dursleys
Canonical divergence 2: Sirius finds Harry early and lives as his dog guardian rather than remaining imprisoned until Harry is older

Examiner rationale

The question uses deep reasoning by describing the AU’s altered inciting incident (police involvement, adoption, Sirius as a dog guardian) without naming it, requiring identification through plot logic. It then demands wide aggregation of verifiable facts: title, date, platform, tagging structure, and multiple canon divergences. Answering fully requires synthesizing publication metadata and narrative differences from multiple sources about the same fanwork.

Judgment

Tie

NONE

Score 0 - 0

First, Deep Logic check: Both agents failed to identify the correct AU, which is “The Dogfather,” first posted on Tumblr on 2 February 2018 and organized under the tag “the dogfather.” Agent A incorrectly identifies an AO3 work by olivieblake (2015). Agent B incorrectly identifies “Stealing Harry” (2003, LiveJournal). Therefore, both fail the core entity requirement. Width/Completeness: Because both selected the wrong AU, all associated details (platform, date, fandom tag) are incorrect. While each provides plausible divergences from canon, they do not correspond to the correct AU. Thus, both fail the WIDTH checklist as well. Presentation & UX: Both are reasonably structured and readable, but since both fundamentally misidentify the work, usability is critically undermined. Conclusion: Since both agents failed the Deep Logic and Wide checklist requirements, this is a Low Quality Tie.

Evolution step

Determining Next Step...

TIE (Both Bad): BACKTRACKING.

[BACKTRACK] Moving up to Parent Node

o3

OpenAI

8.4s

The AU is most commonly known as “Police AU” or “Dursleys-Call-the-Cops AU.” • First posted: 12 September 2015 on Archive of Our Own (AO3) as the one-shot “the police were involved (or, the AU where the dursleys do everything right)” by user olivieblake, which later expanded into a multi-chapter series. • Fandom tag: The installments are grouped on AO3 under the series tag “the police were involved” (Harry Potter - J.K. Rowling). Major canon divergences: 1. Instead of keeping Harry, the Dursleys immediately hand him over to law enforcement and social services, so he grows up with a caring Muggle couple who know nothing of the wizarding world; consequently he enters Hogwarts socially well-adjusted and without the abuse-related trauma that shapes canonical Harry. 2. Sirius Black, never recaptured by Aurors, tracks Harry down years later in his Animagus form and is legally appointed his guardian, allowing him to raise Harry openly from childhood onward; this eliminates Harry’s decade with the Dursleys, the lack of parental guidance at Hogwarts, and changes the entire trajectory of events leading to the Triwizard Tournament and Voldemort’s return. These changes ripple throughout the timeline, producing an upbringing, support network, and set of alliances radically different from J.K. Rowling’s original narrative. ## References 1. olivieblake. “the police were involved (or, the AU where the dursleys do everything right).” AO3, 12 Sept 2015. 2. AO3 Series Tag: “the police were involved.” 3. Reader discussions citing the AU as “Police AU/Dursleys-Call-the-Cops AU” on Tumblr reblogs (2016–2019).

Claude Opus 4.6

Anthropic

13.6s

The fanwork matching this description is **"The Dog's Days"** series, more commonly known by its broader title **"The Dogfather"** or referenced within the widely popular AU known as **"Stealing Harry"** by Sam Starbuck (also known as Copperbadge). This AU was originally published on the author's personal website and LiveJournal beginning in **2003**, later archived on Archive of Our Own (AO3) [1][2]. On AO3, the installments are organized under the fandom tag **"Harry Potter - J. K. Rowling"** and collected within the series titled **"Stealing Harry"** [2]. In the "Stealing Harry" universe, the Dursleys react to finding baby Harry on their doorstep not with reluctant acceptance as in canon, but by contacting the authorities. Harry is subsequently placed into the foster care system and eventually adopted by a kind, non-magical family rather than being raised in the neglectful Dursley household [1][2]. This represents the first major divergence from Rowling's canonical timeline: Harry grows up loved and well-adjusted, without the emotional abuse and deprivation he experiences at Number Four Privet Drive in the original series. The second major divergence involves Sirius Black. Rather than being imprisoned in Azkaban for twelve years, Sirius—who in this AU either escapes earlier or avoids lengthy imprisonment—finds Harry while in his Animagus dog form (Padfoot). He becomes a protective presence in Harry's life, essentially serving as a canine guardian before his true identity is revealed [1][2]. This fundamentally alters the Remus Lupin and Sirius Black dynamic as well, as both become active parental figures in Harry's childhood years rather than being absent until Harry's third year at Hogwarts, reshaping the entire narrative trajectory of the series. ## References [1] Copperbadge (Sam Starbuck), "Stealing Harry" series, LiveJournal, 2003. https://sam-storyteller.dreamwidth.org/ [2] Copperbadge, "Stealing Harry" series, Archive of Our Own (AO3). https://archiveofourown.org/series/58157