I'm convinced that this card is extremely strong in Shaper, given the current Corp meta. Shapers do not have a good answer to the current mix of HB Foodcoats ice in particular, which is usually some mix of Ichi, Assassin and Vikram. Atman 4 makes you vulnerable to the latter two, Atman 5 to the first, so Atman is not a good solution. Cyberdex makes Datasucker support problematic.

However, all three of these are tracers, all are broken by Gingerbread for the same cost or less as the rez cost (which is a fair measure of whether a breaker is efficient).

It also backs up your Lady against NBN match-ups, meaning you can use Lady for Wraparound and Gingerbread for Resistor. 5 credits for Archangel seems bad, but that's the same cost as Gordian. 5 credits for Gutenberg is also bad (given that paying off the trace is 7), but if you're click starved rather than money starved (a common scenario) then paying 5 to avoid the tag and keep your clicks is better than paying 7. However, if you add in NRE then suddenly Gingerbread is one of the best breakers in the game for dealing with Archangel and Gutenberg. It's also as efficient as Mimic at breaking Caduceus.

Given that Yellow and Purple are the dominant corps right now, tracers are everywhere. Gingerbread deserves a second look to fill out your Shaper breaker suite. I have not been disappointed with it.

You only need enough credits in Netrunner to win - any more is a waste of clicks or cards. For that reason, generally it's only worth killing connections that stand to make the runner enough money from now until the end of the game that would enable them to win. For instance, if they've recently installed Kati Jones and have started loading her with cash, she's a good target. Once they've emptied her, she's less appealing, since there's a myriad of ways they could leverage that cash to win the game. However, if they then spend that cash on a few runs and don't win, suddenly she's an inviting target again. Similarly with Professional Contacts, if the runner is sitting on 30 credits then there's little difference between drawing or ProCoing, as they're unlikely to use all that cash by games-end.

It follows then that the best time to kill key connections is when the runner is poor and rig-building. So my question is, why would you spend 4 money and 4 clicks on Contract Killer to kill the runner's connections, when you could spend 1 or 2 clicks and maybe a few credits to Snatch and Grab the connection instead? Yes, it's hard to Snatch and Grab Kati Jones if she's just been unloaded, but that's also the worst time to use Contract Killer on her since she's fulfilled her purpose. The meat damage ability is not very worthwhile, since 2 damage is only enough to kill if backed up by Scorched Earth; at that point you may as well just play Midseasons and Traffic Accident.

Turing is a necessary addition to the game, completing the trinity of AI-hate cards along with Wraparound and Swordsman. When facing lots of Turings in their meta, anyone running Darwin, Crypsis, Overmind or Eater only decks will either have to bite the bullet and switch to a full breaker suite, or else find ways to capitalise on making runs that use up their whole turn.

Aside from that rather hefty boon, I see a number of distinct problems with Turing that make it my least favourite of the new "technological revolutionary" ice that were released with Breaker Bay.

1. If it's not protecting a remote server, Turing is weak to Parasite. Unlike Swordsman, where you get the huge advantage of knocking out a key program mid run, functionally Turing is just going to act as a hard stop for AI-only decks. Not coincidentally, these decks are almost universally Anarch decks, which also pack Parasite. Wraparound is naturally resistant to Parasite absent a fracter, but Turing on a central is 2 turns away from death (less if they're using Datasuckers). If you're trying to find ways to slow down Eater+Keyhole, Eater+Account Siphon or Eater+Vamp, this is not the card for you.

2. Alright, so it needs to go on a remote server. Except outside of Replicating Perfection, we know full well that cards like Eli 1.0 are unreliable as the runner can always just click through if they really want to get into the server. Turing faces a similar problem. Absent some additional tricks like Ash 2X3ZB9CY or Caprice Nisei, Turing is merely a nice taxing card, but tax isn't good enough if your intention is to score all your agendas via a well-defended remote.

3. Alright, so let's put in Ash 2X3ZB9CY and Caprice Nisei, since they're good cards anyway! What's Turing doing for us then? Well, not a bunch, to be honest. 4 for 5 strength and 1 subroutine is a middling cost-to-tax ratio, and is going to be eaten alive by some of the more common code gate breakers like Cyber-Cypher. It compares unfavourably to a lot of alternative HB code gates like NEXT Bronze, which is cheaper and has a higher tax-ceiling in combination with its siblings, and Viktor 2.0 which at least has a couple of subroutines to add to the tax. Mostly, you'll be spending 4 credits to tax the runner by about 4 credits per run. If you're looking to set up a well-defended remote that depends on tax to create scoring windows, you can probably afford the much more effective Tollbooth.

4. At 3 influence, it's unlikely to be imported to any other decks, which means Jinteki, Weyland and NBN will have to make do with Wraparound and Swordsman to deal with AI-heavy metas.

So yeah, if you're playing HB and can't afford the influence on Wraparound or Swordsman this might be a useful card for you. Otherwise, I feel HB is a little spoiled for choice in terms of decent, mid-range code gates.