A much shorter strategy is always suboptimal in problems like these. The higher level your program can go, the better, and that requires more information.
It seems unlikely to me that this ringer/shill strategy will be particularly good compared to the other options, and you haven’t provided a compelling reason why I need to disallow it. What problems does it cause?
It seems unlikely to me that this ringer/shill strategy will be particularly good compared to the other options
It will absolutely be guaranteed to be better than equivalent strategies without ringer/shill. Remember that ringer/shill modifies an existing strategy like tit-for-tat. Ringer tit-for-tat will always beat tit-for-tat since it will score the same as tit-for-tat except when it goes up against shill tit-for-tat, where it will always get the best possible score.
This means that whatever the strongest ~160-character strategy is, the ringer/shill version will beat 2 more strategies than it. Intuitively, it seems unlikely that anyone will come up with a 240-character strategy which is that much stronger than the best ~160-character strategy. Partly this is because I suspect that the more sophisticated strategies that people will actually come up with will start running up against the execution time barrier and won’t have time to make positive use of all that complexity.
you haven’t provided a compelling reason why I need to disallow it.
You don’t need to disallow it, I’m just saying that it would be ideal if it could be disallowed. It could easily not be worth the trouble.
Ringer tit-for-tat will always beat tit-for-tat since it will score the same as tit-for-tat except when it goes up against shill tit-for-tat, where it will always get the best possible score.
It will do worse than tit-for-tat against any bot that cooperates with tit-for-tat and defects against ringer tit-for-tat.
But not much worse; against counterexamplebot, ringer tit-for-tat will defect (so almost full double-defect), and tit-for-tat will always cooperate, so for that match ringer tit-for-tat is down about 50 points (assuming 50 rounds so the score is 100-49). Ringer tit-for-tat then picks up 150 points for each match against the 2 ringers, and the score is now (300-349). And it’s only this close because the modified strategy is tit-for-tat rather than something more clever.
Also, this assumes that a bot even can defect specifically against ringer tit-for-tat. Insofar as ringer’s source is secret and the identification is a function of the source of both ringer and shill, this may not be possible. If I understood correctly we only have access to ourselves and our opponent during the match, so we can’t ask if some 3rd bot would always cooperate against our opponent, who would always defect against the 3rd.
A much shorter strategy is always suboptimal in problems like these. The higher level your program can go, the better, and that requires more information.
It seems unlikely to me that this ringer/shill strategy will be particularly good compared to the other options, and you haven’t provided a compelling reason why I need to disallow it. What problems does it cause?
It will absolutely be guaranteed to be better than equivalent strategies without ringer/shill. Remember that ringer/shill modifies an existing strategy like tit-for-tat. Ringer tit-for-tat will always beat tit-for-tat since it will score the same as tit-for-tat except when it goes up against shill tit-for-tat, where it will always get the best possible score.
This means that whatever the strongest ~160-character strategy is, the ringer/shill version will beat 2 more strategies than it. Intuitively, it seems unlikely that anyone will come up with a 240-character strategy which is that much stronger than the best ~160-character strategy. Partly this is because I suspect that the more sophisticated strategies that people will actually come up with will start running up against the execution time barrier and won’t have time to make positive use of all that complexity.
You don’t need to disallow it, I’m just saying that it would be ideal if it could be disallowed. It could easily not be worth the trouble.
It will do worse than tit-for-tat against any bot that cooperates with tit-for-tat and defects against ringer tit-for-tat.
But not much worse; against counterexamplebot, ringer tit-for-tat will defect (so almost full double-defect), and tit-for-tat will always cooperate, so for that match ringer tit-for-tat is down about 50 points (assuming 50 rounds so the score is 100-49). Ringer tit-for-tat then picks up 150 points for each match against the 2 ringers, and the score is now (300-349). And it’s only this close because the modified strategy is tit-for-tat rather than something more clever.
Also, this assumes that a bot even can defect specifically against ringer tit-for-tat. Insofar as ringer’s source is secret and the identification is a function of the source of both ringer and shill, this may not be possible. If I understood correctly we only have access to ourselves and our opponent during the match, so we can’t ask if some 3rd bot would always cooperate against our opponent, who would always defect against the 3rd.
Well, I’d encourage you to submit this strategy and see how it does. :)