A free to enter, 240 character, open-source iterated prisoner's dilemma tournament

It's conceptually pretty simple; 240 characters isn't room for a lot. Here's how the writer explained it:
 

Here's the annotated version of my bot: https://pastebin.com/1a9UPKQk

The basic strategy is:

Simulate what the opponent will do on the current turn, and what they would do on the next two turns if I defect twice in a row.

If the results of the simulations are [cooperate, defect, defect], play tit-for-tat. Otherwise, defect.

This will defect against DefectBots, CooperateBots, and most of the silly bots that don't pay attention to the opponent's moves. Meanwhile, it cooperates against tit-for-tats and grim triggers and the like.

There are a bunch of details and optimizations and code-golf-ifications, but the big one is that instead of simulating the opponent using the provided function f, I use a code-golfed version of the code used to create bots in the tournament program (in createBot()). This prevents the anti-simulator bots from realizing they're in a simulation - arguments.callee.name is "f", and the variable a isn't defined.

The simulation this bot is doing pits the opposing bot against tit-for-tat, rather than against the winning bot itself, to avoid the infinite regress that would occur if the opposing bot also runs a simulation.

The last paragraph is because I wrote the tournament code poorly, and the function that's provided to the bots to let them simulate other bots was slightly different from the way the top-level bots were run, which allowed bots to tell if they were in a simulation and output different behavior.  (In particular someone submitted a "simulator killer" that would call process.exit() any time it detected it was in a simulation, which would shut down the entire tournament, disqualifying the top-level bot that had run the simulation.) This submission modifies the simulation function to make it indistinguishable.

The greek letters as variable names were for style points.

I mean, yes, it's not currently against the rules, but it obviously should be (or technical measures should be added to render it impossible, like adding random multiline comment blocks to programs).

Presumably the purpose of having 3 bots is to allow me to try 3 different strategies. But if my strategy takes less than about 160 characters to express, I have to use the ringer/shill version of the same strategy since otherwise I will always lose to a ringer/shill player using the same strategy but also shilling for his ringer. And the benefit of the ringer/shill strategy will be constant, since it shouldn't be triggered by other players, just my bots. So it just means all the strategies are inflated by a constant amount. And it requires everyone to adopt the strategy, which is a waste of effort.