SaberSim's stacking rules let you create rules that the lineup builder must follow forcing or avoiding certain combinations of players playing in the same game or on the same team. You can see these stacking rules by opening up the lineup rules tab on your projections tab and clicking add a new rule, which will default to the stack rule. The first thing you want to do is set the logic that you're following for the stack rule. You can either specify that you want at least a certain number of players from the same team, or exactly a certain numbers from the same team. And from there we'll want to specify the positions we're using. Since I'm doing this for football here, I'm going to specify that I want a quarterback stack with at least two pass catchers, but for this rule I'm going to avoid including running backs in that rule.

So what I want to do here is first set quarterback equals to one. One thing to note here is you need to have a mathematical operator in front of all of these numbers. If you just say one here, the build won't work. We need to say equals one. So, I'll go ahead and do that. Then from there, I'm going to specify that I want greater than or equal to two wide receivers or tight ends from the same team. And I'm also going to say that I want zero running backs from this team. I don't want to include running backs with this particular stack. From there, I can go ahead and specify certain teams that I want to include with this rule. And I can also add a run back in this case. I want exactly one player on the opposing team in all of my stacks. And I want that player to either be a wide receiver or a tight end. From there, I can go ahead and click save rule, and that stacking rule will be applied to my builds.

You can also manage your stacks in your exposures table. You can view exposures to team stacks, game stacks, and stack types and eliminate certain constructions from your build or eliminate certain combinations from your build. If, for example, I know that I have this rule set, but I want to limit my exposure from a particularly chalky Buffalo Bills stack, I can go ahead and set the maximum exposure here to, say, 30% to make sure that I'm getting some exposure to other teams in my build. I can also go over to the stack types here and limit my exposure to secondary stacks, where, for example, I want to avoid situations where I'm getting two players from the same team that aren't included in that original stack. I can remove the secondary stacks here, so I'm not getting those kinds of constructions.

If you're used to other DFS optimizers, you're probably going to have to build way less stacking rules into SaberSim than you're used to. And the reason why is because we run play by play game simulations of every game on the slate and calculate the exact correlations between different players playing in the same game. And when you build your lineups, we know how to factor in that correlation data automatically to give you the great kinds of stacks that you're expecting for your lineups depending on that particular sport without having to set a single rule. With that said, if you know there's a particular lineup construction that you want in all your lineups, or specifically lineup constructions that you completely want to avoid, you should tell SaberSim that ahead of time so we can build you a better pool that is better targeted at the way you want to approach the slate.

Here's some best practices for the way that I would recommend using your stacking rules. First, build rules that allow for some flexibility. Because SaberSim is not just a dumb optimizer and we understand correlation, SaberSim will get, for example in the NFL, which running backs are more involved in the passing game, which tight ends are more involved in the passing game, which teams a QB plus three can be viable, and so on. I would try to be as flexible as possible with your rules, which means in general, using things like greater than or equal to or less than or equal to instead of exact equals, and allowing for more positional flexibility than you might be used to.

I'd also recommend starting slow. Do your first build with no stacking rules whatsoever then study those lineups, see what you don't like or you want to add in, add a simple stacking rule, or maybe tweak a few exposures, and then run another build. This process of iteration is one, going to save you a ton of time, but two, give you better overall lineups. Because again, SaberSim knows how to meet you where you're at with what you want to do on the slate and you shouldn't need to feel like you need to set a stacking rule for every particular team or every particular game.

Finally, if you get stuck or you find that you're having a build that's having a very hard time building lineups or failing completely, try walking back some of the stacking rules that you've made. You can reset all of your stacking exposures at once using this red refresh icon up here, and you can also turn off or permanently delete your stacking rules by either unchecking them to turn your stacking rule off or using the trashcan icon to delete that rule completely. Starting over with a blank slate is probably the easiest way to fix issues where you have competing or conflicting stacking rules that are making it really hard for the builder to find lineups.

I hope this was a helpful overview of SaberSim stacking rules, but if you have other questions about the rest of the SaberSim lineup building process, check out some of those other videos in our support documentation. And in the meantime, thank you and good luck.

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