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A platform for playing 18xx games online!
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[18Ardennes] Train limit not enforced during growing to 10-share #11360

Closed ianwilson156 closed 4 days ago

ianwilson156 commented 5 days ago

https://18xx.games/game/186643

In OR5.1, P grew to 10-share and absorbed two minors (#6 & #10). P already had two trains (3 & 5), the minors had a 3 and a 4. The train limit was 2. P discarded the 3 from #6 and accepted the 4 from #10. At this point, P is over train limit, but the program didn't insist to discard a train. P then ran its 3 & 5 (not the 4, since it had already run that round). After that, P had to discard (and chose to discard the 3).

So - there needs to be an extra train-limit check after the grow-to-10-share step.

ollybh commented 4 days ago

I believe that this is the correct behaviour. The last paragraph of section 6.1 of the rules (5-share to 10-share conversion) reads:

If a Company acquires additional trains from exchanged Minor Companies, these are placed face-down and may not be used to earn revenue during the current Operating Round. After the Company has adjusted its Current Market Value, turn any such trains face-up. If the Company is now over its current Train Limit, it must discard excess trains of its choosing to the Open Market, whence they may be bought. A train inherited in this manner may be used in an exchange for a 4D-train.

So the check against the train limit doesn't happen until after the trains are run and dividends paid. I guess this is done so that the company still gets to run a couple of trains in the round it grows up.

ianwilson156 commented 4 days ago

Amazing - I've been playing it wrong all these years!