Let's call the guys A, B, C and D, with A to take first.

If N = 1, A loses immediately (he has to be rude) If N = 2,3 or 4, he will take N-1 and B loses. If N = 5,6 or 7, A will take 3, B will take N-4 and C loses. If N = 8,9 or 10, A and B will each take 3, C will take N-7 and D loses.

If N = 11, A will lose whatever he does (after his turn, it's the same situation as for N = 8,9 or 10, with the players shifted by one). If N = 12,13 or 14, A takes 1,2 and 3, respectively, so that 11 dumplings are left and B will lose. (If he takes too many, e.g. N=12 and he takes 2, it will again be the situation above with A in the losing seat.) If N = 15,16 or 17, A will take 3 and B will act as above, so in the end C loses. If N = 18,19 or 20, A and B take 3, C takes 1,2 or 3 respectively and D loses.

If N = 21, it's the same situation as for N = 11 again, A loses whatever he does.

And so on. In summary, the current business man:

I'm still using ElectrumX. Works well for my purposes, I see no reason to switch.

Alright, sent you 1M sats :)

No need to send anything back, I don't really need those testnet coins anymore.

If you need more testnet coins to open channels, I can send you some.

Not much correlation here. I've become quite stoic about the bitcoin price.

Not sure yet if I will make it today, a bit busy this weekend. Maybe I'll manage to join part of the tournament. If not, have fun and I'll hopefully join the next one!

Thanks! Yes, I've been lurking from time to time so far, but finally decided to sign-up :)

Interested to join. I'm a reasonably strong chess player, but still well blow master level (this is my lichess profile).

Though I personally don't like correspondence games, mostly because it's too easy to cheat there (using an engine). Would be happy to play any real-time (e.g. blitz or rapid) time control.