Hi James, thank you for your quick help. I've tried your solution and it works. I'm new to perl, so in this first attempt I have only used a tiny bit of the real data. So I have modified your solution a little bit to be able to work with an inputfile and an outputfile.

The modified code is 

# Aufruf: perl removeEK1.pl TestEK.txt > Out.txt

use strict;
use warnings;

my $regex = '\{\[%tqu.*]}';
my $subst = '';

while(<>) 
{
    my $line =$_;
    $line =~ s/$regex/$subst/gi;
    print $line;
}

[download]

That worked fine with the following file TestEK.txt: 

[Event "?"]
[Site "?"]
[Date "1985.??.??"]
[Round "?"]
[White "Neuenschwander, Beat"]
[Black "?"]
[Result "1-0"]
[Annotator "Solution"]
[SetUp "1"]
[FEN "8/5ppk/8/3p2KP/3P2P1/8/8/8 w - - 0 1"]
[PlyCount "17"]
[Source "ChessCafe/CB"]
[SourceDate "2003.10.29"]

BlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBla 
1. Ka6 ({Of course not} 1. b6 $2 Kb7 $11) 1... Kb8 (1... f4 2. b6 $18)
+ {[%tqu "What is  White's next move?","","",g3,"",0,b6,"misses the wi
+n:",0]} 2. g3 $1 13. g6 c3
BlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBla
1. Ka6 ({Of course not} 1. b6 $2 Kb7 $11) 1... Kb8 (1... f4 2. b6 $18)
+ {[%tqu "What is  White's next move?","","",g3,"",0,b6,"misses the wi
+n:",0]} 2. g3 $1 13. g6 c31. Ka6 ({Of course not} 1. b6 $2 Kb7 $11) 1
+... Kb8 (1... f4 2. b6 $18) {[%tqu "What is  White's next move?","","
+",g3,"",0,b6,"misses the win:",0]} 2. g3 $1 13. g6 c31. Ka6 ({Of cour
+se not} 1. b6 $2 Kb7 $11) 1... Kb8 (1... f4 2. b6 $18) {[%tqu "What i
+s  White's next move?","","",g3,"",0,b6,"misses the win:",0]} 2. g3 $
+1 13. g6 c3
1. Ka6 ({Of course not} 1. b6 $2 Kb7 $11) 1... Kb8 (1... f4 2. b6 $18)
+ {[%tqu "What is  White's next move?","","",g3,"",0,b6,"misses the wi
+n:",0]} 2. g3 $1 13. g6 c3
BlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBla
BlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBla
BlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaB
+laBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBlaBla

[download]

I got the output I wanted, but when I tested it with a part of my real inputfile, it failed. 

 
.......

[Event "?"]
[Site "?"]
[Date "1933.??.??"]
[Round "?"]
[White "Grigoriev, Nikolay"]
[Black "?"]
[Result "*"]
[Annotator "Solution"]
[SetUp "1"]
[FEN "k7/2p5/8/KP3p2/8/8/6P1/8 w - - 0 1"]
[PlyCount "13"]
[Source "ChessCafe/CB"]
[SourceDate "2003.10.29"]

 1. Ka6 ({Of
course not} 1. b6 $2 Kb7 $11) 1... Kb8 (1... f4 2. b6 $18) {[%tqu "Wha
+t is
White's next move?","","",g3,"",0,b6,"misses the win:",0]} 2. g3 $1 ({
+The hasty
} 2. b6 $2 {misses the win:} Kc8 $1 {with the idea 3...cxb6.} 3. b7+ K
+b8 4. g3
c5 5. Kb5 Kxb7 6. Kxc5 Kc7 7. Kd5 f4 $1 8. gxf4 Kd7 $11 {Black saves t
+he game
by seizing the opposition.}) 2... Ka8 ({Another defensive method also 
+does not
help} 2... Kc8 3. Ka7 Kd8 4. Kb8 $1 {(an opposition!)} Kd7 5. Kb7 Kd8 
+(5... Kd6
6. Kc8 $18) 6. Kc6 {(an outflanking!)} Kc8 7. Kd5 Kb7 8. Ke5 Kb6 9. Kx
+f5 Kxb5
10. g4 c5 11. g5 c4 12. Ke4 $1 {(we shall see this method - an enticem
+ent of
the hostile king under a check - more than once in this book)} Kb4 13.
+ g6 c3
14. Kd3 $1 Kb3 15. g7 c2 16. g8=Q+) {[%tqu "What is White's next move?
+","","",
b6,"",0]} 3. b6 Kb8 {
} 4. Kb5 $1 (4. b7 $2 c5 5. Kb5 Kxb7 $11) 4... Kb7 5. bxc7 Kxc7 {[%tqu
+ "What is White's next move?",
"","",Kc5,"",0]} 6. Kc5 Kd7 {[%tqu "What is White's next move?","","",
+Kd5,
"This time White has seized the opposition, therefore the pawn sacrifi
+ce 7...
f4 is senseless.",0]} 7. Kd5 $18 {This time White has seized the oppos
+ition,
therefore the pawn sacrifice 7...f4 is senseless.} *

[Event "?"]
[Site "?"]

.......

[download]

My outputfile now was the same as the inputfile, the searchtext was not removed!! While in my first attempt I made relatively simple errors, now I think it's difficult and I'm not able to spot what is going wrong. Pherhaps you have an idea?

In reply to Re^2: Substitution don't work by OldChamp
in thread Substitution don't work by OldChamp

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