5 files changed, 145 insertions, 0 deletions
diff --git a/challenge-210/arne-sommer/blog.txt b/challenge-210/arne-sommer/blog.txt
new file mode 100644
index 0000000000..228fdb6056
--- /dev/null
+++ b/challenge-210/arne-sommer/blog.txt
@@ -0,0 +1 @@
+https://raku-musings.com/killing-numbers.html
diff --git a/challenge-210/arne-sommer/raku/ch-1.raku b/challenge-210/arne-sommer/raku/ch-1.raku
new file mode 100755
index 0000000000..30fc7b0acc
--- /dev/null
+++ b/challenge-210/arne-sommer/raku/ch-1.raku
@@ -0,0 +1,28 @@
+#! /usr/bin/env raku
+
+unit sub MAIN (*@int where @int.elems > 0 && @int.all ~~ UInt, :v($verbose));
+
+my $min = @int.min + 1;
+my $max = @int.max - 1;
+
+my $score = -Inf;  
+my $target;
+
+for $min .. $max -> $value
+{ 
+  my $sum = @int.grep({ $value -1 <= $_ <= $value +1 }).sum;
+  
+  if $sum > $score
+  {
+    $target = $value;
+    $score  = $sum;
+    say ": + $value with sum $sum" if $verbose;
+  }
+  elsif $verbose
+  {
+    say ": - $value with sum $sum";
+  }
+  
+}
+
+say $score;
diff --git a/challenge-210/arne-sommer/raku/ch-2.raku b/challenge-210/arne-sommer/raku/ch-2.raku
new file mode 100755
index 0000000000..892dd445a2
--- /dev/null
+++ b/challenge-210/arne-sommer/raku/ch-2.raku
@@ -0,0 +1,44 @@
+#! /usr/bin/env raku
+
+unit sub MAIN (*@list where @list.elems > 0 && @list.all ~~ Int, :v($verbose));
+
+my $index = 0;
+
+loop
+{
+  last unless @list.elems;
+  last if $index == @list.end;
+
+  my $left  = @list[$index];
+  my $right = @list[$index +1];
+
+  print ": { @list.join(",") } index $index " if $verbose;
+
+  if $left >= 0 && $right < 0
+  {
+    if $left > $right.abs 
+    {
+      @list.splice($index+1,1);
+      say "> Remove $right at index {$index+1} -> { @list.join(",") }" if $verbose;
+    }
+    elsif $left < $right.abs
+    {
+      @list.splice($index,1);
+      say "< Remove $left at index $index -> { @list.join(",") }" if $verbose;
+      $index-- unless $index == 0;
+    }
+    else
+    {
+      @list.splice($index,2);
+      say " = Remove $left and $right at index $index and { $index +1 } -> { @list.join(",") }" if $verbose; 
+      $index-- unless $index == 0;
+    }
+  }
+  else
+  {  
+    say "" if $verbose;
+    $index++;
+  }
+}
+
+say "({ @list.join(",") })";
diff --git a/challenge-210/arne-sommer/raku/kill-and-win b/challenge-210/arne-sommer/raku/kill-and-win
new file mode 100755
index 0000000000..30fc7b0acc
--- /dev/null
+++ b/challenge-210/arne-sommer/raku/kill-and-win
@@ -0,0 +1,28 @@
+#! /usr/bin/env raku
+
+unit sub MAIN (*@int where @int.elems > 0 && @int.all ~~ UInt, :v($verbose));
+
+my $min = @int.min + 1;
+my $max = @int.max - 1;
+
+my $score = -Inf;  
+my $target;
+
+for $min .. $max -> $value
+{ 
+  my $sum = @int.grep({ $value -1 <= $_ <= $value +1 }).sum;
+  
+  if $sum > $score
+  {
+    $target = $value;
+    $score  = $sum;
+    say ": + $value with sum $sum" if $verbose;
+  }
+  elsif $verbose
+  {
+    say ": - $value with sum $sum";
+  }
+  
+}
+
+say $score;
diff --git a/challenge-210/arne-sommer/raku/number-collision b/challenge-210/arne-sommer/raku/number-collision
new file mode 100755
index 0000000000..892dd445a2
--- /dev/null
+++ b/challenge-210/arne-sommer/raku/number-collision
@@ -0,0 +1,44 @@
+#! /usr/bin/env raku
+
+unit sub MAIN (*@list where @list.elems > 0 && @list.all ~~ Int, :v($verbose));
+
+my $index = 0;
+
+loop
+{
+  last unless @list.elems;
+  last if $index == @list.end;
+
+  my $left  = @list[$index];
+  my $right = @list[$index +1];
+
+  print ": { @list.join(",") } index $index " if $verbose;
+
+  if $left >= 0 && $right < 0
+  {
+    if $left > $right.abs 
+    {
+      @list.splice($index+1,1);
+      say "> Remove $right at index {$index+1} -> { @list.join(",") }" if $verbose;
+    }
+    elsif $left < $right.abs
+    {
+      @list.splice($index,1);
+      say "< Remove $left at index $index -> { @list.join(",") }" if $verbose;
+      $index-- unless $index == 0;
+    }
+    else
+    {
+      @list.splice($index,2);
+      say " = Remove $left and $right at index $index and { $index +1 } -> { @list.join(",") }" if $verbose; 
+      $index-- unless $index == 0;
+    }
+  }
+  else
+  {  
+    say "" if $verbose;
+    $index++;
+  }
+}
+
+say "({ @list.join(",") })";