Create sendouq-faq.md (#1516)

* Create sendouq-faq.md

* Added a question about match cancellation

* Better wording for rank history

* updated the reported score section

* voice updates, ready for PR

content/articles/sendouq-faq.md

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+---
+title: SendouQ FAQ
+date: 2023-09-28
+author: Joy
+---
+
+## What is SendouQ?
+
+SendouQ is a third-party matchmaking service for Splatoon 3, offering a more competitive alternative to the in-game matchmaking. Matches are conducted in a first-to-4 format, with maps and modes selected by the players. The service is free and open to all players.
+
+## How do I use SendouQ?
+
+Begin by logging in to [sendou.ink](https://sendou.ink) and setting up your profile. Access SendouQ via [https://sendou.ink/q](https://sendou.ink/q). Upon entry, select your placement; if unsure, pick lower—the system will adjust your placement based on performance. Specify your game mode preference and map selection. Once set, join the queue. For more details, view the [feature showcase](https://www.youtube.com/watch?v=XIRNcTFDYzA).
+
+## Why can't I see my rank?
+
+Ranks are assigned after completing 7 sets.
+
+## Why can't I see my rank history?
+
+To view your rank history, two conditions must be met:
+
+1. You have completed a minimum of 7 sets.
+2. These sets were played across 3 separate days, according to server time.
+
+## Both teams misreported the score. What do I do?
+
+A score is accepted if reported identically by both teams. Verify the score before submission to avoid this issue. If you suspect a reported score is fraudulent, please raise the issue in the #helpdesk channel on the [sendou.ink Discord server](https://discord.gg/sendou), and be ready to provide screenshots as evidence.
+
+## The opposing team canceled the match after several games were played. What happened?
+
+Matches can only be canceled if both teams agree to it. If the match was cancelled, someone from your team accepted the cancel request thus legitimizing the match cancellation.
+
+## Why do I have more SP than my opponent but I have a lower rank?
+
+Rank updates aren't real-time. Allow a few minutes for the server to update, then check your (or their) rank again.
+
+## I haven't played in a few days but my rank dropped. What happened?
+
+SendouQ does not implement rank decay, however, ranks are determined by percentile. In this scenario, it's likely other players surpassed your SP, nudging you to a lower rank.
+
+## I won a set but didn't gain any SP. Why?
+
+SP adjustments are influenced by the relative team SP. High-SP teams gain fewer points defeating lower-SP teams, reflecting the expected outcome. To earn more SP, compete against similarly or higher-SP teams.
+
+## I won a set but lost SP. Why?
+
+SendouQ employs [openskill.js](https://github.com/philihp/openskill.js) for SP calculations. Though widely utilized and accurate, its behavior may occasionally seem counterintuitive. In rare instances, you might lose SP on a win or gain SP on a loss, albeit with small changes. You can reduce how often this can happen by competing against similarly ranked teams. For an elementary understanding, refer to the [openskill.py documentation](https://openskill.me/en/stable/manual.html). For deeper insight, the [whitepaper](https://www.csie.ntu.edu.tw/~cjlin/papers/online_ranking/online_journal.pdf) is available, though it requires a strong grasp of Bayesian statistics, equivalent to upper-undergraduate level math.
+
+## What if the FAQ doesn't answer my question?
+
+Join the [sendou.ink Discord server](https://discord.gg/sendou) and ask in the #helpdesk channel.