[SPOILER] My "solution"

Hi,

I did not write a exact solution to the given Tetris quest, but I rewrote a
Tetris-Clone ("Pentris") I wrote once in 1993 in Fortran 77 now in Perl/Tk.

You can find informations about Pentris on my (german) web page
http://www.duehl.de/christian/perl/pentris.html or download the actual
version .0.4 from here:
http://www.duehl.de/christian/perl/projekte/pentris_0.0.4.pl.gz

In Pentris you have the choice between standard Tetris stone set and Pentris
stone set. But the board is a little larger then the 10x20 in the original
Tetris, because the Pentris stones are a little less handy. (But if you want
you could change that in the source code.)

Further more it does not increase the game speed in levels, it increases it
continuously with every emtied line.

Greetings, Christian