Eclectic Symmetric Pass

This is a relay system, which means that in certain bidding situations, one player makes a series of relays, and the other player answers them. The relayer will place the final contract when he has heard enough. It also is a strong pass system in the classical sense, i.e. all hands with 13 or more HCP are "opened" with pass. Another agressive thing about this system is that 1 is the fertilizer bid.
I don't have much details about this system, if you want to see relays in action check out Relay Precision.

Opening bids in 1st and 2nd seat

Responses
Pass 13+ any shape See below
1 8 - 12 HCP, 4+, may have longer suit 1 starts relays
1 8 - 12 HCP, 4+, 0-3, may have longer minor 1 starts relays
1 0 - 7 (8 balanced) Natural
1 8 - 12 HCP, 4+ 4+ 1NT asks, 2/3m preemptive
1NT 9 - 13 balanced, no 4/ or both minors 2 Relay, Transfers
2 8 - 12 HCP, 6+, no 4/ See Weak Two
2 8 - 12 HCP, 6+, no 4/ See Weak Two
2 Weak Two: 5 - 9 HCP, 6-card
2 Weak Two: 5 - 9 HCP, 6-card
2NT 5 - 9 HCP, Two 5-card suits, not

In a strong pass system, there are no 3rd and 4th seat openings because pass is also an opening bid.

Responses to Pass

Response Further Bidding
1 6 - 10 HCP, any shape
1 0 - 5 (6) HCP, any shape
1+ 11+ HCP Relays