I only went wide to give the boats inside me room — do I still owe the boat behind?

Yes. The moment a boat that was clear astern becomes overlapped inside you at the mark, you owe her mark-room under Rule 18.2(a) — even if you were only out wide to give room to other boats. Why you ended up wide doesn't matter. (World Sailing Case 59.)

📖 Want Rule 18 in more depth? Elvstrøm Explains the Racing Rules 2025-2028 sets out every rule with plain-English explanations and diagrams. (affiliate link)

▶ Watch on YouTube ↓ Download (via YouTube)
<iframe width="560" height="315" src="https://www.youtube.com/embed/9nUjvr9hMy0" title="Sailing Kiwi" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
<p><a href="https://sailing.kiwi.nz/v/9nUjvr9hMy0/">Source: Sailing Kiwi</a></p>

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Next on this shelf — The Leeward Mark