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Fun tricks in compact puzzle.

Nice couple of moves though may be more than one solution by the looks of things.

Very unstable for me... I'll give it one or two more tries and see....

The wedge auto pilot took forever to land but the rest was easy. Thanks

@gmacpro ..autopilot. There is a definite technique for that move that is over 90% succes and i found that B’s angle of approach was very important.

Came back to get a hint, but @gmacpro 's comment let me know that I at least had the right idea ...

Nice tricky level...Thanks for sharing @Mike_CN

@gmacpro No need of wedge auto pilot.

Spoiler: solution

1.B go down to the floor, and go through under the end, wait R by staying on the stair;
2.R be stucked at downstairs under the 'window';
3.B back to the position where B was at game-start time, by using two stairs and one stone（B between the stone and the waiting-stair;forth,back,forth again; 90% success）;
4.B enter into the 'window',then to the end.

@Mike_CN .. solution move number three sounds like a momentum move which is never very desirable . I think my autopilot is a cleaner solution.

Spoiler: Autopilot

@ridgerunner Maybe you are right.Your spoiler （I guess that's a video）is invisible to me.

@Mike_CN What you describe is a "boogie bot", a highly counter-intuitive inertia trick generally avoided as part of a designed win path.

@Mike_CN - Step 3 is more of a luck move for me. I can BB downward normally but upwards is a different story as there's an extra tap to get up. The auto pilot on the wedge is way more stable even though it wasn't than the BB.

Excellent tricky level!!! Thanks for sharing!

Really cool tricky compact level!
Thanks!