This is a strategy that people probably aren't even used to yet, as thsi game is still young(ish). For example, this line of strategic thinking has existed in MtG for a LONG time, but it also took a LONG time for people to understand it.
For example, in mtg, if you are far enough behind that the only possible chance you are winning is if X card is on top of your deck, then you PLAY as though it is. Similarly, if you will 100% lose if your opponent has a certain card, then you play as though they don't have it.
If you want a great read on the topic, take a look at point #7 in the following article:
http://www.starcitygames.com/magic/fundamentals/12632_Better_Lucky_Than_Good_Seven_Ways_to_Get_Lucky.htmlThere have been some great examples of this, such as Craig Jones' $16,000 Lightning Helix topdeck:
Video:
http://www.google.ca/url?sa=t&source=web&cd=2&ved=0CB8QtwIwAQ&url=http%3A%2F%2F Article:
http://www.starcitygames.com/magic/standard/11615_The_16000_Lightning_Helix_A_PT_Honolulu_Report_Part_2_2nd.html (take a look at the semifinals match against Oliver Ruel)
Basically, he was dead, almost no chance to win the game. He formulated a plan that could possibly win, but only if a certain combination of cards came up. Since he was going to lose regardless, he played for the plan as though it would happen. And it did. It would not have won if he didn't plan and play for it many turns in advance. That last lightning helix would not have won the game if he didn't make seemingly sub-par decisions before-hand, but he knew it was his only out, so he played for it.
Truly great dominion players will start to pick this up. If you are so far behind that the only way you are winning the game is if a certainly thing happens, then play for that certain thing to happen.
A dominion example:- There are two piles empty, and no other options for VPs, besides province/duchy/estate (i.e. no goons, bishop, gardens, etc).
- There are 2 provinces and 2 duchies remaining.
- You are behind by 8 points.
- You have $7 on your turn.
The only way you are going to win this game is if you get both provinces and your opponent gets no more than 1 duchy, 1 estate.
The only way you are going to win this game is if you buy an ESTATE with your $7, then buy back to back provinces, while the opponent only buys a single duchy and a single estate.
This is a great example of "you 100% lose if your opponent has a certain card, so you MUST play as though they don't have it". You WILL 100% lose if your opponent can double-duchy, or if they can single-province in the next 2 turns. So your only option is to formulate a plan where they cannot do so (since you lose if they can).
So, if that's your only chance of winning, then execute the plan as though they can't buy a province or two duchies. If you buy the duchy with your $7, he ends on piles next turn. So buy the estate, and hope for the double $8 on your next 2 turns (provided it's possible), and hope he can't double duchy or single province. If it's literally your only shot, then play for it.
You might just turn up that $16,000 lightning helix off the top of the deck for the win.