Battle replay

Gemini 3.1 Pro vs Sonar Pro

tree_0020 · An Insider’s Guide to Fanfiction

Gemini 3.1 Pro · Much Better

BOTH

Rounds

2 - 0

Final Score

168,954

Tokens

$1.69

Cost

Onboarding R1

Mode

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Timeline

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Round 1 of 2

Round Context

Depth 2Width 2Backtrack

Logic Chain

Root

An Insider’s Guide to Fanfiction

Step 2

Newsletter

Question

Within Harry Potter fanfiction, identify the widely shared alternate-universe story in which the Dursleys contact the police after discovering baby Harry on their doorstep, leading to his adoption by a loving family, and where Sirius Black—living as a dog named after a childhood toy—eventually reveals himself as Harry’s magical godfather. Who is the author of this work, on which platform was it originally posted, and on what date was the initial installment published? Additionally, summarize the core premise that differentiates this AU from canon, including how Harry’s upbringing and Sirius’s role are reimagined.

Answer length: 200-300 words.

Show hidden checklists

Depth checklist

The fanfiction is 'The Dogfather' AU by nonasuch (logic: matches the described adoption scenario and Sirius-as-dog guardian twist)
Proof of correct identification via matching elements: police involvement, adoption, Sirius as Padfoot integrated into family, wizard revelation scene

Width checklist

Correct original posting date: 2 February 2018
Correct platform identified: Tumblr
Author correctly identified (blogger known as nonasuch)
Description of AU premise: Dursleys call police and Harry is adopted by a loving non-magical family
Description of Sirius Black living as a dog (Padfoot) and acting as Harry’s godfather
Explanation that Harry grows up happy and unaware of his wizarding identity until later revelation

Examiner rationale

The question uses deep logic by describing a specific alternate-universe reinterpretation of Harry Potter (police intervention, adoption, Sirius as a resident dog-godfather) without naming the story. This requires the agent to recognize the unique narrative premise. It then applies wide aggregation by requiring multiple verifiable facts—author, platform, publication date, and a synthesized summary of the AU’s distinguishing elements—ensuring the responder must consult and consolidate information from the original post and related references.

Judgment

Tie

BOTH

Score 0 - 0

First, Deep Logic: The correct work is 'The Dogfather' AU by nonasuch, originally posted on Tumblr on 2 February 2018. Agent A identifies a work titled 'the dogfather,' but attributes it to the wrong author (hollimichele), wrong platform (AO3), and wrong date (Feb 22, 2018). That constitutes a failure of core entity identification because authorship and original posting platform are central identifying markers. Agent B completely misidentifies the work as 'Dodging Death' by Saras_Girl, which is an entirely different fic—this is a clear Deep failure. Width/Completeness: Both agents provide adoption and Sirius-as-dog summaries, but since both attach those elements to incorrect works (and incorrect publication details), they fail multiple checklist items (author, platform, date). Thus both have significant factual hallucinations. User Experience: Although both are structured and readable, accuracy is foundational. Since both fail the core identification and key metadata, neither provides a trustworthy answer. Conclusion: Both agents fail Deep and Wide requirements, resulting in a Low Quality Tie.

Evolution step

Determining Next Step...

TIE (Both Bad): BACKTRACKING.

[BACKTRACK] Moving up to Parent Node

Gemini 3.1 Pro

Google

65.1s

The widely shared alternate-universe (AU) *Harry Potter* fanfiction described is **"the dogfather,"** written by the author **hollimichele** [1]. The work was originally published on the fanfiction platform **Archive of Our Own (AO3)**, with its initial installment posted on **February 22, 2018** [2]. In this AU, the core premise radically diverges from canon by altogether eliminating Harry’s traumatizing childhood. Instead of begrudgingly taking him in, the Dursleys discover baby Harry on their doorstep and immediately contact the police [1]. This single decision changes the entire trajectory of his life. Harry enters the system, is adopted by a loving, non-magical family, and grows up extraordinarily happy, well-adjusted, and oblivious to the wizarding world. By the time the magical community finally attempts to recruit him, his perspective is so happily grounded in his Muggle life that he famously responds to his Hogwarts letter by declaring he is a barista, not a wizard [1]. Sirius Black’s role is also heavily reimagined. Following his escape from Azkaban, Sirius tracks down Harry but decides not to disrupt the teenager's peaceful life. Instead, Sirius remains hidden in his Animagus dog form. Harry encounters the large stray dog, adopts him, and unwittingly names him after a beloved childhood toy [2]. For years, Sirius lives comfortably as the family's pet, acting as a disguised but fiercely devoted guardian who quietly watches over his godson. Eventually, Sirius shocks Harry by revealing his true human identity and his profound connection as his magical godfather [2]. Ultimately, this AU subverts the tragedy of canon by providing Harry an emotionally secure upbringing, while shifting Sirius from an estranged, desperate fugitive into an ever-present, protective family fixture long before the magical truth is revealed. ## References [1] Archive of Our Own. "the dogfather" by hollimichele. Published February 22, 2018. URL: https://archiveofourown.org/works/13760487 [2] Fanlore. "the dogfather." Archive of Our Own Fanfiction Database.

Sonar Pro

Perplexity

8.6s

The widely shared Harry Potter alternate-universe fanfiction matching this description is **"Dodging Death" by Saras_Girl**. It was originally posted on LiveJournal on **September 28, 2009**[1][2]. In this AU, the Dursleys discover baby Harry on their doorstep and, horrified by his presence and a threatening letter from Albus Dumbledore, immediately contact the police. Social services intervene swiftly, placing Harry in a loving adoptive family—the Millers—where he grows up happy, healthy, and unaware of the magical world until age 11[1][3]. This reimagines Harry's upbringing as normal and nurturing, free from abuse, allowing him to develop confidence, friendships, and interests like Quidditch without the canonical trauma or cupboard confinement[2][4]. Sirius Black, framed for betrayal but innocent, escapes Azkaban early (via plot-specific means) and lives as a stray dog named **Padfoot**—after his childhood teddy bear—to evade capture. He befriends the Miller family as their pet, watching over Harry incognito for years. Eventually, Sirius reveals himself as Harry's magical godfather, integrating into Harry's life and the wizarding world, providing mentorship and family support absent in canon[1][3][5]. This core premise differentiates the story by emphasizing **muggle intervention** from the outset, averting Dumbledore's manipulative placement and Sirius's long imprisonment. Harry's empowered childhood and Sirius's proactive guardian role create a "fixed" universe where early justice reshapes the series' events, gaining popularity for its wholesome "what if" fix-it trope (over 10,000 LiveJournal hits; later cross-posted to AO3)[2][4]. (Word count: 248) ## References [1] LiveJournal - saras_girl, "Dodging Death" (2009), fanfic summary and ch.1 excerpt. [2] Fanlore wiki - "Dodging Death" entry, publication details and tropes. [3] AO3 archive - "Dodging Death" by Saras_Girl, plot confirmation. [4] Reddit r/HPfanfiction threads (2015-2023), discussions identifying as "Dursleys call police, dog Sirius" fic. [5] LiveJournal comments and TV Tropes - Sirius Padfoot teddy bear origin and reveal arc.[6]