I expect this is quite an open question, but I'll try to keep it on point:

I know it depends on specific deck tactics, but under what circumstances should I consider mulliganing?

My initial thoughts are that, as a Runner, I can be quite generous with mulliganing. Didn't get the first part of my combo, or a decent economy card? Might as well mulligan.

As a Corp, I'm always a LOT more reluctant to mulligan, short of three agendas in hand or something. I feel like there's a great deal more risk to a Corp mulligan.

So, does anyone have any guidance? How "bad" does a hand have to be to force a Runner mulligan? How about a Corp one?

3 Answers 3


Your initial analysis is pretty good, but perhaps overemphasising the risk to the corp. The real issue is that five cards from 45 is a very variable draw, and the results are a pretty unpredictable. I'll examine the two cases separately.


As you say, the runner can mulligan fairly freely - there isn't much of a downside.

Obvious mulligans:

  • No icebreakers, or only a code gate breaker.
  • No economy boost, combined with high-cost icebreaker. (If you have a cheap starter icebreaker, consider living without the economy boost - time is always on the corp's side, so press the pace while you can.)
  • If your deck's based around a key three-card combo or the like, and you haven't drawn any of them. (But don't try for two; your odds aren't good enough.)

However, you still need to understand what your 'typical' opening hand looks like, because you don't want to make the situation worse while trying for better! It's important to understand the odds of getting what you want - they're often not as good as your intuition says.

For example, if your deck is 1/3 icebreakers in a 45 card deck, your chance of getting at least two in the opening hand is only about 55%. If you have 8 specifically anti-sentry icebreakers, your chance of drawing one of them is about 65%. (If it's crucial to have one, you have the same chance again in a mulligan, of course, for a total chance of about 90%)

A runner deck usually needs to be more tactic-focussed than the corp, but that's mitigated by your comparative ease of draw. Unlike the corp, you can afford to push your draws early if you're missing a useful element. Understand which kinds of cards your deck actually needs to open with, and be prepared to let go of ones you merely want.


There's nothing inherently more risky about mulligans for the corp - since cards are reshuffled, the corp gets the same chances the runner does. The problem is that draws are highly variable, and the corp is more vulnerable to extreme hands than the runner, so - appropriately - you need to be more risk-averse.

Obvious mulligan conditions:

  • Multiple agendas, obviously. Three must be mulliganned, but even two should be strongly considered - it's too many to protect, and you don't know if you're about to draw a third. (If you have 9 agendas in deck, your chance to draw two or more of them in a mulligan is only about 26%, so if the rest of your hand doesn't defend those two quickly, redraw.)

  • Lack of ICE. What this means is highly situational, however, and depends on your opponent. Against an Anarch virus deck, it's vitally important to protect HQ / R&D with something quickly, but usually not a panic to ramp to your high-power stuff - favour fact ICE over economy or power.

    If you're playing Jinteki ambushes, on the other hand, it can be more important to get decoy servers up early than heavy protection - burn the runner early and he'll be more cautious about remote servers in future.

  • Economic development is usually more important but less urgent for a corp, but that depends a lot on your deck. Weyland economy powerhouses shouldn't actually worry that much if they don't draw credit boosters to start with; there should be one along shortly. NBN tag decks should consider drawing for one if they start with high-cost ICE and not enough ways to rez it.

More than the runner, the corp needs to understand what their deck is intended to do. Corp decks are often broader-based than runner ones; you should be able to "settle" for a wider variety of opening hands.


Mulligans are pretty low-risk in Netrunner; if your hand is worse-than-average you should try to improve it. However, it's very important to understand what an "average" hand look like for your deck - if your hand is a better than average draw, but doesn't have the key cards you want, it's still risky to try for them. You're likely to make it worse.

For the mathematically inclined, grab a spreadsheet. Your chance of drawing a card or card type in your opening hand, if there are N of that card type in a deck of D cards, is

1 - HYPGEOMDIST (0, 5, N, D)

(Excel syntax used here, but all spreadsheets should have something very similar)

  • 1/3 icebreakers seems really, really high... I don't know the last time I've ever seen a deck with 15 breakers... Not having an ice breaker in your opening hand for a runner is also not an obvious, automatic mulligan.
    – Andrew
    Jan 3, 2018 at 15:02
  • 1
    @Andrew Yes, 15 is not too likely for a real-world runner deck in the modern environment. But that's why it serves to illustrate the point: even if a third of your deck is of one card type, you've only got a bit better than 50/50 chance to draw more than one at the start. At the moment "no icebreakers" isn't a dealbreaker, but I felt it was at the time I wrote the answer - we didn't have as many good draw/filter/search options in 2013. Especially as beginner players were well advised to have one icebreaker around early. Unsure how to update this answer, but you're right, we should.
    – Tynam
    Jan 4, 2018 at 23:34
  • You make fare points, but I can't agree with you that in 2013 no breakers was a dealbreaker, Special Order and Diesel are core. Self modifying code came out one month after your answer, and that card definitely answered breaker issues better than any before it.
    – Andrew
    Jan 5, 2018 at 14:21
  • @Andrew Your point is well taken; even at the time I should have said "...or a card that lets you search for one". It was so obvious to me that Special Order counts as an icebreaker for these purposes, I forgot to say it! This answer definitely needs updating. I've been out of play for the last two years, so would you care to do it?
    – Tynam
    Mar 7, 2018 at 12:02

Mulliganing for the corp is more important than for the runner because for the corp, card are a liability as much as a boon. The runner can spend clicks drawing cards without penalty beyond time, whereas for the corp to do the same would be to risk an agenda flood without time or money to set up appropriate defenses.

The answer will of course be deck/strategy specific, but here are some simple heuristics:

As the corp, mulligan if:

  • You have more agendas than ICE
  • You can't afford most of the cards in your hand
  • You have no traps/combo pieces in a deck that's designed to win by traps/combo

As the runner, mulligan if:

  • You can't afford most of the cards in your hand
  • You have only support cards and none of the cards they are designed to support (ex. all cards like Personal Touch and Modded, and no programs to go with them)
  • You have no combo pieces if your deck is designed to win by combo

I'm no pro, but as Corp I tend to mulligan if I have too many agendas on my hand or when I have too little ICE. The Runner's ability to freely run your HQ and R&D on his first turn can lead to a really bad start..

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .