OK, Mildly Addicted here :oops:He listed it as

I thought I'd make an easy one.. turned out to be `a little tougher` than I first thought. *Warning* this one's trouble :wink: . I called it the Double Block.. for more than one reason. My method for this one is a little scrappy at present, see what you think.

*Difficult*, and added another bandage, calling it Double Block Clock, which he listed as

*Very Hard*. I don't know about Double Block Clock yet, but Double Block fell together nicely for me. I wonder if there is something in the scrambling that I am missing that would make it more difficult. I don't think so, but if someone would like to challenge me with a Double Block scramble, I'd me more than willing to try it out.

With the two blocks solved and Green Up and White on the Left, the 5 corners, and 5 of the 7 edges are easily permuted with moves of R and U. My main algorithms?

1. (Ri U R Ui) x n and (R U Ri Ui) x n where n is an element of {1, 2, 3}. In other words, EPS, Double-EPS, and Triple-EPS.

2. Ui L2 D L2 U moves FD and BD into U and R.

3. (R U R Ui R U R Ui R) swaps UR and UB and cycles 4 corners.

4. (R U Ri U R U2 Ri)—Sune— works with Yellow Up and Green Right, but in my solves so far I haven't used it to move edges.

5. I haven't come up with, or needed, a 3-cycle of corners. The 3 double swaps have been adequate for permuting corners.

6. Twisting Corners—to me, this is what puts this puzzle in the

*Difficult*range. First, I'll give the algorithm, then I'll explain how I came up with it.

**Twisting 6 clock and 7 anti Steps**

1. Hold Yellow Up and Green on R.

2. ((Right-hand Sune) (DE)2 L (Left-hand Sune) Li (DE)2) x 3

3. Hold White on Left and Green Up.

4. (R U Ri Ui) x 3

5. (Ri U R Ui) x 3

No long, complex, unfamiliar sequences at all! But how did I come up with that process? Well, I knew I could use Sune with Yellow Up and Green on the Right. I knew that because of the 2x2x1 block I couldn't use the Sune/mirror method of twisting corners simply. But what did I have to lose. Figured I would try to do something like it and see what happened. I did it 3 times to preserve the edges. After step 2 I went back to White on the Left and Green Up and looked at the corners. I saw that corner 2 (FRU) needed to go to 3 (RFD) so I did the Triple-EPS that would do that. Then I looked at the corners and saw that 2 and 7 (URB) needed to swap, and 6 (DRB) and 8 (ULB) needed to swap, so I did the Triple-EPS that would do that. Then I looked at the corners and noticed that 6 twisted clockwise and 7 anti-clockwise. Golden. :D

**August 3, 2014**

Oh no!!!! I was afraid it couldn't be that easy. After having such an easy time "figuring out" Double Block, I moved on to Double Block Clock. The Clock part made it impossible to twist corners as with Double Block. So I was exploring different things I could do with it, and discovered a whole new way of scrambling Double Block that does funky things like flipping edges. So no more DB Clock until I have a go at the revisited Double Block with new twists and turns not covered on the first go round.

7. Flipping Edges—(U2 L F Li U2) Ri (U2 L F Li U2) R flips UB and RB and restores FD.