57 I'd have it look for numbers in the post, then compare that to the current count (stored locally), incrementing or decrementing based on a guess as to what they probably meant. If the local count and the actual numbers in the posts get desynchronized for, say, five posts, the bot would itself make a post going all like "Hey now, what's going on here", and then scan the next few posts for specially-formatted commands that the players could use to tell the bot what happened.
As for Dwarf Fortress: In Fortress Mode, at least, it's a game where you control a band of dwarves on a quest to build a grand new fortress and protect it from invaders. You don't have direct control over the dwarves- you can say "mine out that wall", or "smelt this ore", or "build a forge", or "kill those goblins", but you don't have a great deal of control over who does what task when, and very little control over how the dwarves carry out the tasks or what they do when they don't have any orders.
You also have to set up farms to produce plants for making food, booze, and cloth. You need to make tools to keep things like mining and woodcutting going smoothly; traps, weapons, and armor to protect your citizens from aggressive wild animals and invaders. You need all manner of workshops in order to make those things and, in some cases, the things needed to make them. All the while, you'll want to produce goods to sell to traveling elven, human, and dwarven merchants, in exchange for things you need, but might not have.
Eventually, your dwarves will start electing nobles, who then require you to give them fancier living quarters than the average dwarf. They'll also occasionally mandate that you produce random goods, and start sentencing random dwarfs to the annoyingly-lethal dwarven justice system if you don't.
Also, you've got to keep track of how happy or stressed-out your dwarves are. Dwarves under too much stress for too long may start throwing tantrums, and if they do, they might hurt or kill other dwarves, which makes their friends and family pretty seriously upset, which can make them start tantruming too, and if you don't fix the problem quickly, your entire fortress could tear itself apart in a vicious spiral unhappiness. That's called a tantrum spiral, and they're really not all that rare. Sometimes they can be set off by a single dwarf's pants wearing away into nothingness.
And then there's external threats to deal with. Goblin snatchers give way to ambush parties and, later, sieges as your fortress builds up wealth. Wealth also attracts larger foes, such as dragons and bronze colossi. Threats can even come from underground- there's all kinds of hostile critters in the caverns, and even the occasional terrifying procedurally-generated forgotten beast. And if you dig too deep...