Digishield is used for difficulty adjustment when mining resembles a typical proof-of-work coin. However, when percentage fees kick in and the static rewards drop, a modified version of digishield will be used, thus named slingshield.
For blocks with no transactions, slingshield is exactly the same as digishield. Low rewards and percentage based fees could put loyal miners at a disadvantage, since multipools could swoop in when a high fee transaction is broadcast, and quickly mine the block, taking all of the fees from loyal miners without contributing significantly to network security or overall hashrate.
Slingshield fixes this problem while helping to enable a multipool's variable contribution to make the network signficantly more secure.
When a transaction is broadcast, and the amount of fees would increase the static block reward by 2%, the difficulty of the block being mined is increased by 1%. When the fee would increase block reward by 3%, difficulty is raised by 2%, etc. This ensures that high reward blocks (when multipools would typically hop on, but soon after leave) have a difficulty reflective of the expected hashrate.
Along with ensuring mining remains fair and block times remain constant, slingshield also increases difficulty in conducting a double spend(or other attack) by leveraging the variable amount of power contributed by multipools. This effectively ensures that to double spend a large amount of coins, you would need not 51% of the hashing power of the network, but rather up to 71% of the network.

Masternodes Explanations/Guides/Setups/Tools for DRK Newcomers
https://darkcointalk.org/threads/masternodes-explanations-guides-setups-tools-for-drk-newcomers.3055/

by tungfa. which helps a lot for the beginner to take the first step through the Dark gate~   

Great New Pages for MN Checking and Mainting just came out !
https://darkcointalk.org/threads/new-masternode-explorer-website.3068/
by darkchild. Well, how can i say~ All the info that relative is beauty and clear~ try it yourself~ 

We already have a block reward tied to difficulty. Besides, I don't think we should be changing the rewards anymore.

Read the description again.  Block reward doesn't change.

I never thought I'd say this but I now think that this coin could go to parity with bitcoin (on price that is, not on marketcap) at some point. I'm not saying it will, I'm just saying I can see reasons why it could.

I realise thats a bit of a bold statement and back in May when everyone was saying it I was rubbishing them, but the thing is several critical factors have changed since then. 4 things in particular:

[1] - it survived. This is probably the single biggest factor in a coin's fortunes I think - to survive the exit from the gate, a pump & dump phase and an awful lot of FUD attack

[2] - the competition didn't survive (and there was a lot of it). That just shows you what a big technical challenge this type of project is

[3] - it occupies prime space in the market. It has a genuinely original offering that is known to be desirable and furthermore that is mutually exclusive with Bitcoin

[4] - it's a 1st generation proof of work coin that supports Bitcoin's commercial interface. The competition in this field is now dwindling because we're into Bitcoin 2.0 type technologies that are more about shares and stuff. So Darkcoin can be considered now to have fully captured the 1st generation, Bitcoin compatible anonymous POW market for the foreseeable future unless it screws up which looks increasingly unlikely as time goes on

Juast sayin - it's an observation, but if you look at the ask liquidity in the markets it's thin as hell. It doesn't look to me like there's many people wanting out of this coin. If it gets another rise like the May one it's going to be big.

I am now hypnotized