- Added solutions by Mariano Ortega.

- Added solutions by Laurent Rosenfeld.
- Added solutions by E. Choroba.
- Added solutions by Jan Krnavek.

26 files changed, 2975 insertions, 2759 deletions

diff --git a/challenge-281/laurent-rosenfeld/blog.txt b/challenge-281/laurent-rosenfeld/blog.txt
new file mode 100644
index 0000000000..ff1dfbd91a
--- /dev/null
+++ b/challenge-281/laurent-rosenfeld/blog.txt
@@ -0,0 +1 @@
+https://blogs.perl.org/users/laurent_r/2024/08/perl-weekly-challenge-281-check-color.html
diff --git a/challenge-281/laurent-rosenfeld/perl/ch-1.pl b/challenge-281/laurent-rosenfeld/perl/ch-1.pl
new file mode 100644
index 0000000000..7e82b7fa65
--- /dev/null
+++ b/challenge-281/laurent-rosenfeld/perl/ch-1.pl
@@ -0,0 +1,16 @@
+use strict;
+use warnings;
+use feature 'say';
+
+sub check_color {
+    my ($abscissa, $ordinate) = split //, shift;
+    my $code = 1;
+    $code = 0 if $abscissa =~ /[aceg]/;
+    return "True" if ($code + $ordinate) % 2 == 0;
+    return "False";
+}
+
+for my $coordinates (qw<a1 d3 g5 e6 h8>) {
+    printf "%-2s => ", $coordinates;
+    say check_color $coordinates;
+}
diff --git a/challenge-281/laurent-rosenfeld/raku/ch-1.raku b/challenge-281/laurent-rosenfeld/raku/ch-1.raku
new file mode 100644
index 0000000000..8bb4e7be27
--- /dev/null
+++ b/challenge-281/laurent-rosenfeld/raku/ch-1.raku
@@ -0,0 +1,15 @@
+sub check-color ($in) {
+    my ($abscissa, $ordinate) = $in.comb;`
+    my $code;
+    given $abscissa {
+        when /<[aceg]>/ {$code = 0}
+        when /<[bdfh]>/ {$code = 1}
+    }
+    return True if ($code + $ordinate) %% 2;
+    False;
+}
+
+for <a1 d3 g5 e6 h8> -> $coordinates {
+    printf "%-2s => ", $coordinates;
+    say check-color $coordinates;
+}
diff --git a/stats/pwc-challenge-280.json b/stats/pwc-challenge-280.json
new file mode 100644
index 0000000000..a0cb8ae2be
--- /dev/null
+++ b/stats/pwc-challenge-280.json
@@ -0,0 +1,635 @@
+{
+   "chart" : {
+      "type" : "column"
+   },
+   "series" : [
+      {
+         "name" : "The Weekly Challenge - 280",
+         "colorByPoint" : 1,
+         "data" : [
+            {
+               "name" : "Adam Russell",
+               "drilldown" : "Adam Russell",
+               "y" : 3
+            },
+            {
+               "drilldown" : "Alexander Karelas",
+               "name" : "Alexander Karelas",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Ali Moradi",
+               "name" : "Ali Moradi",
+               "y" : 5
+            },
+            {
+               "y" : 2,
+               "name" : "Andrew Schneider",
+               "drilldown" : "Andrew Schneider"
+            },
+            {
+               "drilldown" : "Arne Sommer",
+               "name" : "Arne Sommer",
+               "y" : 3
+            },
+            {
+               "name" : "Athanasius",
+               "drilldown" : "Athanasius",
+               "y" : 4
+            },
+            {
+               "name" : "BarrOff",
+               "drilldown" : "BarrOff",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Bob Lied",
+               "name" : "Bob Lied",
+               "y" : 2
+            },
+            {
+               "y" : 3,
+               "name" : "Dave Jacoby",
+               "drilldown" : "Dave Jacoby"
+            },
+            {
+               "y" : 2,
+               "name" : "David Ferrone",
+               "drilldown" : "David Ferrone"
+            },
+            {
+               "y" : 2,
+               "drilldown" : "E. Choroba",
+               "name" : "E. Choroba"
+            },
+            {
+               "y" : 2,
+               "drilldown" : "Feng Chang",
+               "name" : "Feng Chang"
+            },
+            {
+               "name" : "Jaldhar H. Vyas",
+               "drilldown" : "Jaldhar H. Vyas",
+               "y" : 5
+            },
+            {
+               "y" : 2,
+               "name" : "Jan Krnavek",
+               "drilldown" : "Jan Krnavek"
+            },
+            {
+               "y" : 3,
+               "name" : "Jorg Sommrey",
+               "drilldown" : "Jorg Sommrey"
+            },
+            {
+               "name" : "Kjetil Skotheim",
+               "drilldown" : "Kjetil Skotheim",
+               "y" : 2
+            },
+            {
+               "name" : "Laurent Rosenfeld",
+               "drilldown" : "Laurent Rosenfeld",
+               "y" : 6
+            },
+            {
+               "drilldown" : "Luca Ferrari",
+               "name" : "Luca Ferrari",
+               "y" : 12
+            },
+            {
+               "y" : 2,
+               "name" : "Mark Anderson",
+               "drilldown" : "Mark Anderson"
+            },
+            {
+               "drilldown" : "Matthew Neleigh",
+               "name" : "Matthew Neleigh",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Matthias Muth",
+               "name" : "Matthias Muth",
+               "y" : 3
+            },
+            {
+               "name" : "Nelo Tovar",
+               "drilldown" : "Nelo Tovar",
+               "y" : 2
+            },
+            {
+               "name" : "Packy Anderson",
+               "drilldown" : "Packy Anderson",
+               "y" : 5
+            },
+            {
+               "drilldown" : "Peter Campbell Smith",
+               "name" : "Peter Campbell Smith",
+               "y" : 3
+            },
+            {
+               "drilldown" : "Peter Meszaros",
+               "name" : "Peter Meszaros",
+               "y" : 2
+            },
+            {
+               "y" : 3,
+               "drilldown" : "Reinier Maliepaard",
+               "name" : "Reinier Maliepaard"
+            },
+            {
+               "name" : "Robbie Hatley",
+               "drilldown" : "Robbie Hatley",
+               "y" : 3
+            },
+            {
+               "drilldown" : "Robert Ransbottom",
+               "name" : "Robert Ransbottom",
+               "y" : 2
+            },
+            {
+               "y" : 5,
+               "drilldown" : "Roger Bell_West",
+               "name" : "Roger Bell_West"
+            },
+            {
+               "drilldown" : "Thomas Kohler",
+               "name" : "Thomas Kohler",
+               "y" : 4
+            },
+            {
+               "y" : 4,
+               "name" : "Ulrich Rieke",
+               "drilldown" : "Ulrich Rieke"
+            },
+            {
+               "y" : 3,
+               "drilldown" : "W. Luis Mochan",
+               "name" : "W. Luis Mochan"
+            },
+            {
+               "name" : "Wanderdoc",
+               "drilldown" : "Wanderdoc",
+               "y" : 2
+            }
+         ]
+      }
+   ],
+   "drilldown" : {
+      "series" : [
+         {
+            "name" : "Adam Russell",
+            "id" : "Adam Russell",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "id" : "Alexander Karelas",
+            "name" : "Alexander Karelas"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Ali Moradi",
+            "name" : "Ali Moradi"
+         },
+         {
+            "id" : "Andrew Schneider",
+            "name" : "Andrew Schneider",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Arne Sommer",
+            "name" : "Arne Sommer"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "name" : "Athanasius",
+            "id" : "Athanasius"
+         },
+         {
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "id" : "BarrOff",
+            "name" : "BarrOff"
+         },
+         {
+            "id" : "Bob Lied",
+            "name" : "Bob Lied",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Dave Jacoby",
+            "name" : "Dave Jacoby"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "name" : "David Ferrone",
+            "id" : "David Ferrone"
+         },
+         {
+            "name" : "E. Choroba",
+            "id" : "E. Choroba",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "id" : "Feng Chang",
+            "name" : "Feng Chang"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "name" : "Jaldhar H. Vyas",
+            "id" : "Jaldhar H. Vyas"
+         },
+         {
+            "name" : "Jan Krnavek",
+            "id" : "Jan Krnavek",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ]
+         },
+         {
+            "id" : "Jorg Sommrey",
+            "name" : "Jorg Sommrey",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "name" : "Kjetil Skotheim",
+            "id" : "Kjetil Skotheim"
+         },
+         {
+            "id" : "Laurent Rosenfeld",
+            "name" : "Laurent Rosenfeld",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  2
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  10
+               ]
+            ],
+            "name" : "Luca Ferrari",
+            "id" : "Luca Ferrari"
+         },
+         {
+            "id" : "Mark Anderson",
+            "name" : "Mark Anderson",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "id" : "Matthew Neleigh",
+            "name" : "Matthew Neleigh"
+         },
+         {
+            "name" : "Matthias Muth",
+            "id" : "Matthias Muth",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "id" : "Nelo Tovar",
+            "name" : "Nelo Tovar",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ]
+         },
+         {
+            "id" : "Packy Anderson",
+            "name" : "Packy Anderson",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Peter Campbell Smith",
+            "name" : "Peter Campbell Smith"
+         },
+         {
+            "id" : "Peter Meszaros",
+            "name" : "Peter Meszaros",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Reinier Maliepaard",
+            "name" : "Reinier Maliepaard"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "name" : "Robbie Hatley",
+            "id" : "Robbie Hatley"
+         },
+         {
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "name" : "Robert Ransbottom",
+            "id" : "Robert Ransbottom"
+         },
+         {
+            "name" : "Roger Bell_West",
+            "id" : "Roger Bell_West",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "id" : "Thomas Kohler",
+            "name" : "Thomas Kohler",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  2
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "id" : "Ulrich Rieke",
+            "name" : "Ulrich Rieke"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "name" : "W. Luis Mochan",
+            "id" : "W. Luis Mochan"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "id" : "Wanderdoc",
+            "name" : "Wanderdoc"
+         }
+      ]
+   },
+   "title" : {
+      "text" : "The Weekly Challenge - 280"
+   },
+   "subtitle" : {
+      "text" : "[Champions: 33] Last updated at 2024-08-05 12:10:36 GMT"
+   },
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   },
+   "xAxis" : {
+      "type" : "category"
+   },
+   "plotOptions" : {
+      "series" : {
+         "dataLabels" : {
+            "format" : "{point.y}",
+            "enabled" : 1
+         },
+         "borderWidth" : 0
+      }
+   },
+   "tooltip" : {
+      "pointFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>",
+      "followPointer" : 1,
+      "headerFormat" : "<span style='font-size:11px'>{series.name}</span><br/>"
+   },
+   "legend" : {
+      "enabled" : 0
+   }
+}
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index 9aa2c38d8e..4e0ea5448a 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,119 +1,89 @@
 {
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   },
+   "xAxis" : {
+      "type" : "category"
+   },
+   "plotOptions" : {
+      "series" : {
+         "borderWidth" : 0,
+         "dataLabels" : {
+            "format" : "{point.y}",
+            "enabled" : 1
+         }
+      }
+   },
+   "legend" : {
+      "enabled" : 0
+   },
+   "series" : [
+      {
+         "data" : [
+            {
+               "y" : 2,
+               "name" : "Alexander Karelas",
+               "drilldown" : "Alexander Karelas"
+            },
+            {
+               "y" : 2,
+               "name" : "David Ferrone",
+               "drilldown" : "David Ferrone"
+            },
+            {
+               "y" : 2,
+               "name" : "E. Choroba",
+               "drilldown" : "E. Choroba"
+            },
+            {
+               "drilldown" : "Jan Krnavek",
+               "name" : "Jan Krnavek",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Laurent Rosenfeld",
+               "y" : 3,
+               "name" : "Laurent Rosenfeld"
+            },
+            {
+               "drilldown" : "Mariano Ortega",
+               "y" : 2,
+               "name" : "Mariano Ortega"
+            },
+            {
+               "drilldown" : "Mark Anderson",
+               "y" : 2,
+               "name" : "Mark Anderson"
+            }
+         ],
+         "colorByPoint" : 1,
+         "name" : "The Weekly Challenge - 281"
+      }
+   ],
+   "chart" : {
+      "type" : "column"
+   },
+   "tooltip" : {
+      "pointFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>",
+      "followPointer" : 1,
+      "headerFormat" : "<span style='font-size:11px'>{series.name}</span><br/>"
+   },
+   "title" : {
+      "text" : "The Weekly Challenge - 281"
+   },
    "drilldown" : {
       "series" : [
          {
-            "id" : "Adam Russell",
-            "name" : "Adam Russell",
+            "id" : "Alexander Karelas",
             "data" : [
                [
                   "Perl",
                   2
-               ],
-               [
-                  "Blog",
-                  1
-               ]
-            ]
-         },
-         {
-            "name" : "Alexander Karelas",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ]
-            ],
-            "id" : "Alexander Karelas"
-         },
-         {
-            "id" : "Ali Moradi",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Raku",
-                  2
-               ],
-               [
-                  "Blog",
-                  1
-               ]
-            ],
-            "name" : "Ali Moradi"
-         },
-         {
-            "id" : "Andrew Schneider",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ]
-            ],
-            "name" : "Andrew Schneider"
-         },
-         {
-            "id" : "Arne Sommer",
-            "data" : [
-               [
-                  "Raku",
-                  2
-               ],
-               [
-                  "Blog",
-                  1
                ]
             ],
-            "name" : "Arne Sommer"
-         },
-         {
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Raku",
-                  2
-               ]
-            ],
-            "name" : "Athanasius",
-            "id" : "Athanasius"
-         },
-         {
-            "name" : "BarrOff",
-            "data" : [
-               [
-                  "Raku",
-                  2
-               ]
-            ],
-            "id" : "BarrOff"
-         },
-         {
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ]
-            ],
-            "name" : "Bob Lied",
-            "id" : "Bob Lied"
-         },
-         {
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Blog",
-                  1
-               ]
-            ],
-            "name" : "Dave Jacoby",
-            "id" : "Dave Jacoby"
+            "name" : "Alexander Karelas"
          },
          {
             "name" : "David Ferrone",
@@ -126,42 +96,14 @@
             "id" : "David Ferrone"
          },
          {
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ]
-            ],
             "name" : "E. Choroba",
-            "id" : "E. Choroba"
-         },
-         {
-            "id" : "Feng Chang",
-            "name" : "Feng Chang",
-            "data" : [
-               [
-                  "Raku",
-                  2
-               ]
-            ]
-         },
-         {
+            "id" : "E. Choroba",
             "data" : [
                [
                   "Perl",
                   2
-               ],
-               [
-                  "Raku",
-                  2
-               ],
-               [
-                  "Blog",
-                  1
                ]
-            ],
-            "name" : "Jaldhar H. Vyas",
-            "id" : "Jaldhar H. Vyas"
+            ]
          },
          {
             "name" : "Jan Krnavek",
@@ -174,462 +116,46 @@
             "id" : "Jan Krnavek"
          },
          {
-            "id" : "Jorg Sommrey",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ],
-               [
-                  "Blog",
-                  1
-               ]
-            ],
-            "name" : "Jorg Sommrey"
-         },
-         {
-            "name" : "Kjetil Skotheim",
-            "data" : [
-               [
-                  "Perl",
-                  2
-               ]
-            ],
-            "id" : "Kjetil Skotheim"
-         },
-         {
-            "name" : "Laurent Rosenfeld",
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-                  2
-               ],
-               [
-                  "Raku",
-                  2
-               ],
-               [
-                  "Blog",
-                  2
-               ]
-            ],
-            "id" : "Laurent Rosenfeld"
-         },
-         {
-            "id" : "Luca Ferrari",
-            "name" : "Luca Ferrari",
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-                  "Raku",
-                  2
-               ],
-               [
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-         },
-         {
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-                  2
-               ]
-            ],
-            "id" : "Mark Anderson"
-         },
-         {
-            "id" : "Matthew Neleigh",
-            "name" : "Matthew Neleigh",
+            "id" : "Laurent Rosenfeld",
             "data" : [
                [
                   "Perl",
-                  2</