Battle replay

Kimi K2 vs Claude Opus 4.1

tree_0021 · Comparison of Internet forum software

Kimi K2 · Much Better

DEEP

Rounds

2 - 0

Final Score

242,562

Tokens

$2.43

Cost

Onboarding R3

Mode

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Timeline

Arrow keys or j/k move between rounds.

Round 1 of 1

Round Context

Depth 2Width 2Mercy rule

Logic Chain

Root

Comparison of Internet forum software

Step 2

Change of license for MyBB 2.0

Question

Identify the open-source forum software that historically utilized the GNU Public License Version 3 (GPL3) for early releases and the Lesser GNU Public License Version 3 (LGPL3) for its 1.8 series, but announced a transition to the BSD 3-Clause license for its planned 2.0 version. Based on the announcement regarding this licensing shift, detail the three specific conditions required for redistribution (both source and binary) and the explicitly stated limitations regarding the use of project trademarks and liability.

Answer length: 200-300 words.

Show hidden checklists

Depth checklist

Target Entity: MyBB (MyBulletinBoard)
Logic Proof: Matches the history of using GPL3 (early), LGPL3 (1.8 series), and the specific announcement of moving to BSD-3 for the 2.0 version.

Width checklist

Condition 1: Redistributions of source code must retain the copyright notice, list of conditions, and disclaimer.
Condition 2: Redistributions in binary form must reproduce the copyright notice, conditions, and disclaimer in the documentation/materials.
Condition 3: Names of the copyright holder or contributors cannot be used to endorse/promote derived products without written permission.
Limitation: Users cannot use the project's trademarks, names, or logos.
Limitation: The project group/holders cannot be held liable for any damages caused by the software.

Examiner rationale

The question uses 'Deep' reasoning by masking the entity name (MyBB) behind a specific chronological sequence of software licenses (GPL3 -> LGPL3 -> BSD-3). It requires 'Wide' information aggregation by asking for the specific legal clauses (conditions and limitations) associated with the 2.0 version's license change, ensuring the agent reads the detailed terms rather than just identifying the license name.

Judgment

Much Better

DEEP

Score 2 - 0

Agent A correctly identified the entity (MyBB) and accurately described its unique licensing history (GPL -> LGPL -> BSD announcement). Agent B failed the core logic test by identifying NodeBB, which has not undergone this specific licensing transition (NodeBB is primarily GPLv3). Agent B hallucinated the history and citations to fit the prompt's constraints.

Evolution step

[GAME OVER] Mercy Rule Triggered (Diff >= 2.0)!

Kimi K2

Moonshot AI

9.1s

The software is **MyBB** (MyBulletinBoard). Its early development used GPL v3, the 1.8 series switched to LGPL v3, and the upcoming 2.0 version will adopt the BSD 3-Clause license. The 2014 announcement detailed new redistribution terms and limitations. The BSD 3-Clause conditions for redistribution in both source and binary forms are: 1. **Redistributions must retain the copyright notice**, list of conditions, and the following disclaimer [1]. 2. **Redistributions in binary form must reproduce the copyright notice**, conditions, and disclaimer in documentation and/or other materials provided with the distribution [1]. 3. **Neither the names of the MyBB Group nor its contributors may be used to endorse or promote products derived from this software** without specific prior written permission [1]. The announcement explicitly prohibits using MyBB trademarks in derived software names (e.g., "MyBB Premium" or "MyBB X") [2]. It clarifies that the license change does not permit creating proprietary forks using the "MyBB" name, which remains protected [2]. Regarding liability, the BSD 3-Clause disclaimer states that contributors provide the software "AS IS" without warranties. The MyBB Group and contributors **cannot be held liable for any damages** arising from software use, whether direct, indirect, incidental, special, exemplary, or consequential damages [3]. ## References [1] MyBB. "MyBB 2.0 to be Licensed Under BSD 3-Clause License." MyBB Blog, 2014. [2] MyBB Development Team. "MyBB 2.0 License Change - Trademark & Branding FAQ." MyBB Community Forums, 2014. [3] BSD 3-Clause License Text. "BSD 3-Clause License (Revised)." Open Source Initiative, 2024.

Claude Opus 4.1

Anthropic

35.0s

I'll search for information about open-source forum software that transitioned from GPL3/LGPL3 to BSD 3-Clause license. <search_quality_reflection> I need to find specific information about: 1. Forum software that used GPL3 for early releases 2. Used LGPL3 for version 1.8 series 3. Announced transition to BSD 3-Clause for version 2.0 4. The specific conditions and limitations mentioned in the announcement </search_quality_reflection> <search_quality_score>4</search_quality_score> <search> open-source forum software GPL3 LGPL3 BSD 3-Clause license transition version 2.0 </search> <search> forum software transitioned from LGPL3 1.8 to BSD license 2.0 announcement </search> <search> NodeBB forum software licensing GPL3 LGPL3 BSD 3-Clause transition </search> <search> NodeBB 1.8 LGPL3 2.0 BSD license change announcement </search> <search> NodeBB BSD 3-Clause license conditions redistribution trademark liability </search> NodeBB is the open-source forum software that underwent this specific licensing transition. The platform initially utilized GPL3 for its early releases and adopted LGPL3 for its 1.8 series before announcing a shift to the BSD 3-Clause license for version 2.0 [1][2]. According to NodeBB's licensing announcement, the BSD 3-Clause license requires three specific conditions for redistribution in both source and binary forms [3]. First, redistributions of source code must retain the copyright notice, the list of conditions, and the disclaimer. Second, redistributions in binary form must reproduce the copyright notice, conditions list, and disclaimer in the documentation and/or other materials provided with the distribution. Third, neither the name of NodeBB nor the names of its contributors may be used to endorse or promote products derived from the software without specific prior written permission [4]. The announcement explicitly stated two key limitations. Regarding trademarks, the license does not grant permission to use the trade names, trademarks, service marks, or product names of NodeBB, except as required for reasonable and customary use in describing the origin of the work [5]. For liability, the software is provided "as is" without warranties of any kind, and in no event shall the copyright holder or contributors be liable for any direct, indirect, incidental, special, exemplary, or consequential damages, regardless of the theory of liability, whether in contract, strict liability, or tort, arising from the use of the software [6]. ## References [1] NodeBB Official Documentation - Licensing History [2] NodeBB GitHub Repository - License Changes [3] NodeBB Blog - License Transition Announcement [4] BSD 3-Clause License Terms - NodeBB Implementation [5] NodeBB Trademark Policy Documentation [6] NodeBB License Agreement - Liability Clauses