Settlers of Catan - solo variants

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Streamed on May 20, 2021. Tried out two different solo variants of Settlers of Catan. Both were found on boardgamegeek.com.
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[@029132]

Is there a solo version of seafarers?

[@geekedupboardgames1076]

can you download the rules?🙂

[@beardownbandit]

Here is one:
boardgamegeek.com/thread/460453/solitaire-race-against-destroyer
I think this is the other one I played:
boardgamegeek.com/thread/2411742/catan-base-game-solo-variant-choise-making-d12-two
It also looks like there are some other solo modes in the Catan forums on BGG since I found the above ones.