My solve on round 1 of Twente Open 2012:

L2 U2 D B U2 B' D2 B U2 L R' D2 F R F' U F U2 R U F R2 F2 D' B' (25)

I choosed [B'] as pre-scramble move on the normal scramble. Why? I Explain later.

2x2x2 block: U2 D' B L

not happy with continuation so I searched for inserted moves, possibilities: L, L2 and L' before first move. L2 worked out best:

so: 2x2x2 block: L2 U2 D' B L (5+1)

pseudo 2x2x3: R' D (7+1)

undo pseudoness with extra pre-move D' (7+2)

So premoves [D' B'] F2L-1: F R2 (9+2)

switch to the inverse scramble with this start as pre-moves: [R2 F' D2 R L' B' D U2 L2]

F2L-1: B D (2+9)

many possibilities to finish f2l, I choosed for most cancellations on next step (ELL)

F2L: F2 R2 F' R2 F R (8+9)

ELL: R' F' R2 U' R' U2 F' U F R (12+9) -- 6 moved cancelled!

again one move cancelled with pre-move correction which gave the following edge frame with 3 corners left:

B D F2 R2 F' U' R' U2 F' U F R R2 F' D2 R L'@ B' D U2 L2 (20)

at @ insert U2 B' D2 B U2 B' D2 B, 3 moves cancel

inverting the solve gives the solution above

Why did I choose B' as pre-move in the beginning? Let me explain.

- 3 moves make a pair on the regular scramble ( U', R2 and L')

- 3 moves make a pair on the invere scramble ( U, R, R2, L, and B)

Because each "pairing-move" can also be used a pre-scramble-move, there are 16 ways to start with a 1-move-pair.

These are simple too much possibilities to investigate, so I had to pick only a few of them.

Then I had a look at number of the bad pairs after the scramble. Bad pairs are adjacent corner-edge pairs that are wronly paired up. This scramble had 6 bad pairs. Which is about average.

I choosed B on the inverse scramble and B' as pre-move on the inverse scramble because this move unlocked 2 bad pairs while all other pairing-moves did not unlock any bad pair.

This tactic is based on the assumption that less bad pairs in a scramble are possibly easier too solve, at least easier to find a good block build.

I cannot prove this, purely intuitive assumption.

Since three months or so I use this trick to prevent getting lost in too many, good or bad, possible starting moves.

And this time it worked out very well.

Happy with this, a PB-2, I never did so many tricks in a competition solve. ;-)