#44419: AI still researches Future Tech even when it loses tech
Open Date: 2022-04-18 23:50
Last Update: 2022-04-23 17:46
URL for this Ticket:
https://osdn.net//projects/freeciv/ticket/44419
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Last Changes/Comment on this Ticket:
2022-04-23 17:46 Updated by: Anonymous
Comment:
Reply To cazfi
Savegame from the game where this is happening would probably help, if you can attach one.
I uploaded a save file (I don't recall the exact turn it started, but at this point in the game the AI is losing tech due to a negative balance) in google doc (anyone with link can download the save file)
https://drive.google.com/file/d/1drOk6zvMGELtqe67dnJu3FKfa0WP5_RY/view?usp=sharing
To be clear, future tech is unlocked only once you complete the tech tree once, however, both I as a player and the AI can both continue researching future tech even when we lose a tech (only the AI never switches off the tech tree)
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Ticket Status:
Reporter: (Anonymous)
Owner: (None)
Type: Bugs
Status: Open
Priority: 5 - Medium
MileStone: (None)
Component: AI
Severity: 5 - Medium
Resolution: None
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Ticket details:
Not sure if this is a bug or unintended programming, but once the AI completes the tech tree once and starts getting into future tech, if it loses tech due to an insufficient research point balance (which classic and most rulesets have), the AI won't switch the tech to unlock whatever tech was lost and the game allows.
In the game I played for over 500 turns, the AI in question (set to hard difficulty, using the civ23 ruleset, it completed the full tech tree around turn 480 and never switched tech despite losing over a dozen techs (it went as far back as losing communism and the AI was still researching future tech each and every turn until the game ended around turn 550). The game was configured to teams, this AI was part of the player's team and despite not having the tech, the AI didn't ask for tech via diplomacy as it occasionally does when configured to be in teams. The game settings had a tech penalty for changing tech, but only 50% instead of the default percentage when changing tech mid research.
The recommendation is unless the ruleset has perks for future tech (to my knowledge, classic and most rulesets don't use future tech for anything), if the AI is researching future tech, check the tech tree to see if there are any missing tech and change to that. Otherwise, this exploit could be used to cripple an advanced AI civilization into easy submission because it suddenly loses all the keystone technologies to make it a viable challenger to the other players
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