AI Galleys cheat and cross a specific section you cant (SS included)

[AU_Armageddon]

BUG: AI Galleys can cross from any coast tile into any coast tile. Human players cannot when there is a slim ocean between two adjacent coast tiles.

This has happened to me in 2 games now.

This current game is Islands but the settings are irrelevent. You can see in the screen-shot that the Mongols are separated from me by that slim bit of ocean that is actually between the adjacent tiles, since both tiles themselves are traversible for galleys, both tiles being coasts.

I can't cross this mini-strip of ocean. The AI galleys however can.

This bug basically lost me both games. In this one, there was no other way to cross anywhere. Being islands, I sacrificed my lead to build a full invasion force only to find it one-way again. Strategically obselete techs pursued, all buildings behind and lost wonders races, and left with a crippling economy deficit from a huge army with nowhere to go

 

[MrCynical]

Am I right in thinking that the rubble in the top left hand corner of your continent was a mongol city? If it was then their cultural border would have included the surrounding ocean squares at this junction. Galleys would then be able to cross since they are allowed in ocean as long as it is within the civ's cultural borders. if you put a city there and expanded your border to meet the mongol one, you could cross with a galley.

They must have got across the first time because their border includes the crucial corner sqaure, whereas yours doesn't.

 

[DeathsHead]

Oops to slow....

 

[AU_Armageddon]

No. I had a city there. He came in via galley. Looked about. Declared war. Sent in yet more galleys. Razed my city (size 1). He then sent in settlers, built a new one on same spot. I took it and razed it (size 1).

I see what you mean, and that is an interesting point I hadn't considered. Thanks.

However, I would assume you are right, except that in this particular instance, I only just built the city like 3 turns prior before he came in. I have Stonehenge, yet I am fairly sure there is still no way it was up long enough for the border to expand.

Either, my cities border expanded somehow, all his ships and horses got through but he hung back in that corner with his settler and archers until after he destroyed my city.
OR
It is actually a bug where the AI doesn't discrimate coast-to-coast differences and he just cheated.

Both are possible (it is though not possible his border ever pushed out further than you see it there).

 

[CyberChrist]

This is not a bug or build-in AI cheat.

Moving to/from oceans within your own borders (or borders of a nation you have open borders agreement with) to/from a coast outside your own borders(etc.) is allowed for AI and human players alike - and as your own screenshot clearly shows then the Mongols cultural border is covering the ocean square in the top left of the visible map that borders directly to your coastlines.

 

[AU_Armageddon]

If you are right, then it's a stupid exploit. Some might call it a 'strategy', but it makes no sense. His galleys can freely traverse back and forth, and mine cannot. Not based on techs. Not based on anything but blind luck (since you can't see far enough or plan for such specific events - I even did the hard yards scouting my entire coastal perimeter with workboats to be sure).

It's impact is that of a bug.
*Provides a colossal advantage
*Cannot really be planned for - 99.9% will result purely out of luck
*Illogical rule (same unit. same terrain. side A 100% movement; side B 0% movement). If it was one-way it would still be crap, but at least it would be logical.

 

[DrewBledsoe]

If you are right, then it's a stupid exploit. Some might call it a 'strategy', but it makes no sense. His galleys can freely traverse back and forth, and mine cannot. Not based on techs. Not based on anything but blind luck (since you can't see far enough or plan for such specific events - I even did the hard yards scouting my entire coastal perimeter with workboats to be sure).

It's impact is that of a bug.
*Provides a colossal advantage
*Cannot really be planned for - 99.9% will result purely out of luck
*Illogical rule (same unit. same terrain. side A 100% movement; side B 0% movement). If it was one-way it would still be crap, but at least it would be logical.

Im afraid that the previous replies are correct. If you had a right of passage (oops its called open borders now) then you COULD cross there , but otherwise you can't; same thing happened to me in one game. Its just pure bad luck on the map you had, and remember , it could have been YOU that was the Mongols, and then the A.I. would have been stuffed

 

[BeefontheBone]

It's impact is that of a bug.
*Provides a colossal advantage
*Cannot really be planned for - 99.9% will result purely out of luck
*Illogical rule (same unit. same terrain. side A 100% movement; side B 0% movement). If it was one-way it would still be crap, but at least it would be logical.

Hold on a second - it's a big advantage, yes, but one you could have prevented, it can clearly be planned for by not letting him raze your city, in fact you can make use of it by expanding your culture in a similar situation, and it's an entirely logical rule in the game's terms.

In fact, you say he came over and razed that city, in which case you DID have the same rights he did when that city's culture was present (or would have had if it had been large enough to reach that square) - it's entirely your own fault for failing to prevent him from razing the city I'm afraid - having done so, he now has an advantage in bringing further troops to your lands; cunning ploy by the AI, methinks.

 

[Xerol]

You could plant a city there and just spam culture until you get a strategically placed ocean tile under your control.