Qualifikation zur Logic Masters 2010

[Calavera]

Very nice puzzles today, except tetris. If someone give me first three logic steps maybe I finish the puzzle until next weekend

While I simply ignored Tetris during the contest I now saw that it is relatively accessible once you know how to treat it:

• take the 4 given lines and copy them into the diagram on the left, always leaving 2 empty lines below each copied line
  
• check which letters can be used for the square
  
• place the square(s) at the only possible location(s)
  
• see how the rest of the now entered empty line can be filled
  
• there's still a lot of thinking left but I think it's a good starting help
  

I on the other hand might need a starting point for puzzle #20. I did recognize interesting things about the given numbers but so far I found no entry point.


Regards,

Calavera