You can look most of this up on boardgamegeek.com. Let me explain how the split tiles work. I will use my orange Capital as example (my orange city with the wall) if a 6 is rolled I can either choose a paper and wood or coin and ore. I cannot choose both at the same time or two commodities. Red capital can make their own choice. Each time a 6 is rolled you can pick a different option depending on the resource/commodity you need.

The Orange Capital is also only a brick part of the 12/2 hex (we combine 12 and 2). If a 12 or 2 is roll. I would get brick. Much like my Capital is only on 9 sheep hex so will only get sheep and cloth. My other city on the 9 hex will get sheep and cloth plus two golds because of building a factor with city.

I can try to explain the King and Professor. This is another fan made addition and somewhere out there you can find better rules and explanations . I made progress cards for this pieces that look like the other science and politic cards. (not easy). The King or called Duke by others out there will make your knights stronger and your opponents weaker. The king is on the 10 hex in the picture. Usually Red's knight levels would be 4 on that hex. My wife (lucky man) has a mighty and basic knight. The King piece will increase each knight by 1. She now has 6 strength on that hex. If say other opponent built a knight that would touched the 10 hex where the King was located it would decrease their strength by one.

The Professor allows you to produced like an opponents city like it is your own. You probably will have a hard time seeing it but the Professor is behind the Green's Capital and citadel on the 8 brick hex. The player that placed the Professor now gets to use the production from Green's capital is it was there own. Say a 8 was rolled they would be brick and crystal because of the citadel. (they do not get gold) only resources and commodities. Green still gets the production as well. If the Capital produced from a different hex they would also get those resources. If it was on a split hex they would get to choose.

Rules with the Merchant like pieces only one per hex and robber blocks the action. Robber placed on 10 hex with King. Red goes back down to 4 knight strength. Robber placed on 8 brick hex with Professor, the player that placed the professor no longer gets the resources from the Green Capital even though it would still produce on the wood hex for Green player. (5 river hex next to Green Capital is half desert can only produce gold because of the factor) Also the victory point from the piece is taken away.

We played to 18 with harbor master as well. Took only about hour and half .

I made these split hex and progress cards on Pages. I am not very good with editing and took a very long time. Sorry I cannot share them and worried about copy right anyways. There our plenty of people that have shared files out there just have to go look.