- Added solutions by Roger Bell_West.

- Added solutions by PokGoPun.
- Added solutions by Arne Sommer.
- Added solutions by Adam Russell.
- Added solutions by Bob Lied.
- Added solutions by Ali Moradi.
- Added solutions by Laurent Rosenfeld.

21 files changed, 1714 insertions, 1577 deletions

diff --git a/challenge-225/conor-hoekstra/ch-01.apl b/challenge-225/conor-hoekstra/apl/ch-1.apl
index e8183e14f1..e8183e14f1 100644
--- a/challenge-225/conor-hoekstra/ch-01.apl
+++ b/challenge-225/conor-hoekstra/apl/ch-1.apl
diff --git a/challenge-225/conor-hoekstra/ch-02.bqn b/challenge-225/conor-hoekstra/bqn/ch-2.bqn
index b6e63254ed..b6e63254ed 100644
--- a/challenge-225/conor-hoekstra/ch-02.bqn
+++ b/challenge-225/conor-hoekstra/bqn/ch-2.bqn
diff --git a/challenge-225/conor-hoekstra/ch-01.hs b/challenge-225/conor-hoekstra/haskell/ch-1.hs
index 0763225b2a..0763225b2a 100644
--- a/challenge-225/conor-hoekstra/ch-01.hs
+++ b/challenge-225/conor-hoekstra/haskell/ch-1.hs
diff --git a/challenge-225/laurent-rosenfeld/blog1.txt b/challenge-225/laurent-rosenfeld/blog1.txt
new file mode 100644
index 0000000000..5e0ce3c638
--- /dev/null
+++ b/challenge-225/laurent-rosenfeld/blog1.txt
@@ -0,0 +1 @@
+https://blogs.perl.org/users/laurent_r/2023/07/perl-weekly-challenge-225-left-right-sum-diff.html
diff --git a/challenge-225/laurent-rosenfeld/perl/ch-2.pl b/challenge-225/laurent-rosenfeld/perl/ch-2.pl
new file mode 100644
index 0000000000..97de5d58ec
--- /dev/null
+++ b/challenge-225/laurent-rosenfeld/perl/ch-2.pl
@@ -0,0 +1,19 @@
+use strict;
+use warnings;
+use feature 'say';
+
+sub lrsd  {
+    my @in = @_;
+    my @l = (0);
+    push @l, $l[-1] + $in[$_] for 0..$#in-1;
+    my @r = (0);
+    push @r, $r[-1] + $in[$_] for reverse 1..$#in;
+    @r = reverse @r;
+    return join " ", map { abs ($l[$_] - $r[$_]) } 0..$#l;
+}
+
+my @tests = ([10, 4, 8, 3], [1,], [1, 2, 3, 4, 5] );
+for my $test (@tests) {
+    printf "%-10s => ", "@$test";
+    say lrsd @$test;
+}
diff --git a/challenge-225/laurent-rosenfeld/raku/ch-2.raku b/challenge-225/laurent-rosenfeld/raku/ch-2.raku
new file mode 100644
index 0000000000..f0121ad3e5
--- /dev/null
+++ b/challenge-225/laurent-rosenfeld/raku/ch-2.raku
@@ -0,0 +1,11 @@
+sub lrsd (@in) {
+    my @l = (0, [\+] @in[0..@in.end - 1]).flat;
+    my @r =
+    (( [\+] @in.reverse[0..@in.end - 1]).reverse, 0).flat;
+    return map { (@l[$_] - @r[$_]).abs }, 0..@l.end;
+}
+my @tests = (10, 4, 8, 3), (1,), (1, 2, 3, 4, 5);
+for @tests -> @test {
+    printf "%-10s => ", "@test[]";
+    say lrsd @test;
+}
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index b1815a7ac8..43d74ddb89 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,4 +1,13 @@
 {
+   "plotOptions" : {
+      "series" : {
+         "borderWidth" : 0,
+         "dataLabels" : {
+            "enabled" : 1,
+            "format" : "{point.y}"
+         }
+      }
+   },
    "yAxis" : {
       "title" : {
          "text" : "Total Solutions"
@@ -6,124 +15,181 @@
    },
    "series" : [
       {
-         "name" : "The Weekly Challenge - 225",
          "colorByPoint" : 1,
          "data" : [
             {
-               "y" : 2,
+               "name" : "Adam Russell",
+               "drilldown" : "Adam Russell",
+               "y" : 4
+            },
+            {
+               "y" : 4,
+               "drilldown" : "Ali Moradi",
+               "name" : "Ali Moradi"
+            },
+            {
                "name" : "Andreas Voegele",
+               "y" : 2,
                "drilldown" : "Andreas Voegele"
             },
             {
+               "y" : 3,
+               "drilldown" : "Arne Sommer",
+               "name" : "Arne Sommer"
+            },
+            {
                "drilldown" : "Avery Adams",
                "y" : 4,
                "name" : "Avery Adams"
             },
             {
+               "name" : "Bob Lied",
                "y" : 2,
+               "drilldown" : "Bob Lied"
+            },
+            {
                "name" : "Dave Jacoby",
-               "drilldown" : "Dave Jacoby"
+               "drilldown" : "Dave Jacoby",
+               "y" : 2
             },
             {
                "y" : 2,
-               "name" : "David Ferrone",
-               "drilldown" : "David Ferrone"
+               "drilldown" : "David Ferrone",
+               "name" : "David Ferrone"
             },
             {
-               "drilldown" : "E. Choroba",
                "name" : "E. Choroba",
+               "drilldown" : "E. Choroba",
                "y" : 2
             },
             {
                "name" : "Joelle Maslak",
-               "y" : 2,
-               "drilldown" : "Joelle Maslak"
+               "drilldown" : "Joelle Maslak",
+               "y" : 2
             },
             {
-               "drilldown" : "Laurent Rosenfeld",
-               "y" : 3,
-               "name" : "Laurent Rosenfeld"
+               "name" : "Laurent Rosenfeld",
+               "y" : 6,
+               "drilldown" : "Laurent Rosenfeld"
             },
             {
+               "y" : 2,
                "drilldown" : "Lubos Kolouch",
-               "name" : "Lubos Kolouch",
-               "y" : 2
+               "name" : "Lubos Kolouch"
             },
             {
+               "drilldown" : "Luca Ferrari",
                "y" : 8,
-               "name" : "Luca Ferrari",
-               "drilldown" : "Luca Ferrari"
+               "name" : "Luca Ferrari"
             },
             {
-               "y" : 1,
                "name" : "Mariano Spadaccini",
+               "y" : 1,
                "drilldown" : "Mariano Spadaccini"
             },
             {
-               "drilldown" : "Mark Anderson",
                "name" : "Mark Anderson",
-               "y" : 2
+               "y" : 2,
+               "drilldown" : "Mark Anderson"
             },
             {
                "y" : 3,
-               "name" : "Peter Campbell Smith",
-               "drilldown" : "Peter Campbell Smith"
+               "drilldown" : "Peter Campbell Smith",
+               "name" : "Peter Campbell Smith"
             },
             {
+               "drilldown" : "PokGoPun",
+               "y" : 2,
+               "name" : "PokGoPun"
+            },
+            {
+               "y" : 3,
                "drilldown" : "Robbie Hatley",
-               "name" : "Robbie Hatley",
-               "y" : 3
+               "name" : "Robbie Hatley"
             },
             {
-               "name" : "Robert DiCicco",
                "y" : 4,
-               "drilldown" : "Robert DiCicco"
+               "drilldown" : "Robert DiCicco",
+               "name" : "Robert DiCicco"
             },
             {
-               "drilldown" : "Robert Ransbottom",
                "y" : 2,
+               "drilldown" : "Robert Ransbottom",
                "name" : "Robert Ransbottom"
             },
             {
-               "name" : "Solathian",
+               "y" : 4,
+               "drilldown" : "Roger Bell_West",
+               "name" : "Roger Bell_West"
+            },
+            {
                "y" : 2,
-               "drilldown" : "Solathian"
+               "drilldown" : "Solathian",
+               "name" : "Solathian"
             },
             {
-               "drilldown" : "Steven Wilson",
+               "name" : "Steven Wilson",
                "y" : 1,
-               "name" : "Steven Wilson"
+               "drilldown" : "Steven Wilson"
             },
             {
-               "y" : 4,
                "name" : "Thomas Kohler",
-               "drilldown" : "Thomas Kohler"
+               "drilldown" : "Thomas Kohler",
+               "y" : 4
             },
             {
                "drilldown" : "Ulrich Rieke",
-               "name" : "Ulrich Rieke",
-               "y" : 4
+               "y" : 4,
+               "name" : "Ulrich Rieke"
             },
             {
-               "drilldown" : "W. Luis Mochan",
+               "name" : "W. Luis Mochan",
                "y" : 3,
-               "name" : "W. Luis Mochan"
+               "drilldown" : "W. Luis Mochan"
             }
-         ]
+         ],
+         "name" : "The Weekly Challenge - 225"
       }
    ],
-   "xAxis" : {
-      "type" : "category"
-   },
-   "title" : {
-      "text" : "The Weekly Challenge - 225"
+   "tooltip" : {
+      "followPointer" : 1,
+      "pointFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>",
+      "headerFormat" : "<span style='font-size:11px'>{series.name}</span><br/>"
    },
-   "legend" : {
-      "enabled" : 0
+   "chart" : {
+      "type" : "column"
    },
    "drilldown" : {
       "series" : [
          {
+            "id" : "Adam Russell",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  2
+               ]
+            ],
+            "name" : "Adam Russell"
+         },
+         {
+            "id" : "Ali Moradi",
+            "name" : "Ali Moradi",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ]
+            ]
+         },
+         {
             "id" : "Andreas Voegele",
             "data" : [
                [
@@ -134,8 +200,21 @@
             "name" : "Andreas Voegele"
          },
          {
+            "id" : "Arne Sommer",
+            "name" : "Arne Sommer",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
             "id" : "Avery Adams",
-            "name" : "Avery Adams",
             "data" : [
                [
                   "Perl",
@@ -145,6 +224,17 @@
                   "Blog",
                   2
                ]
+            ],
+            "name" : "Avery Adams"
+         },
+         {
+            "id" : "Bob Lied",
+            "name" : "Bob Lied",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
             ]
          },
          {
@@ -158,23 +248,23 @@
             ]
          },
          {
-            "id" : "David Ferrone",
+            "name" : "David Ferrone",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "name" : "David Ferrone"
+            "id" : "David Ferrone"
          },
          {
+            "name" : "E. Choroba",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "name" : "E. Choroba",
             "id" : "E. Choroba"
          },
          {
@@ -188,35 +278,35 @@
             "name" : "Joelle Maslak"
          },
          {
+            "id" : "Laurent Rosenfeld",
             "name" : "Laurent Rosenfeld",
             "data" : [
                [
                   "Perl",
-                  1
+                  2
                ],
                [
                   "Raku",
-                  1
+                  2
                ],
                [
                   "Blog",
-                  1
+                  2
                ]
-            ],
-            "id" : "Laurent Rosenfeld"
+            ]
          },
          {
-            "id" : "Lubos Kolouch",
             "name" : "Lubos Kolouch",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "id" : "Lubos Kolouch"
          },
          {
-            "id" : "Luca Ferrari",
+            "name" : "Luca Ferrari",
             "data" : [
                [
                   "Raku",
@@ -227,30 +317,31 @@
                   6
                ]
             ],
-            "name" : "Luca Ferrari"
+            "id" : "Luca Ferrari"
          },
          {
             "id" : "Mariano Spadaccini",
+            "name" : "Mariano Spadaccini",
             "data" : [
                [
                   "Perl",
                   1
                ]
-            ],
-            "name" : "Mariano Spadaccini"
+            ]
          },
          {
-            "name" : "Mark Anderson",
             "data" : [
                [
                   "Raku",
                   2
                ]
             ],
+            "name" : "Mark Anderson",
             "id" : "Mark Anderson"
          },
          {
             "id" : "Peter Campbell Smith",
+            "name" : "Peter Campbell Smith",
             "data" : [
                [
                   "Perl",
@@ -260,10 +351,21 @@
                   "Blog",
                   1
                ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
             ],
-            "name" : "Peter Campbell Smith"
+            "name" : "PokGoPun",
+            "id" : "PokGoPun"
          },
          {
+            "id" : "Robbie Hatley",
+            "name" : "Robbie Hatley",
             "data" : [
                [
                   "Perl",
@@ -273,12 +375,9 @@
                   "Blog",
                   1
                ]
-            ],
-            "name" : "Robbie Hatley",
-            "id" : "Robbie Hatley"
+            ]
          },
          {
-            "id" : "Robert DiCicco",
             "data" : [
                [
                   "Perl",
@@ -289,40 +388,54 @@
                   2
                ]
             ],
-            "name" : "Robert DiCicco"
+            "name" : "Robert DiCicco",
+            "id" : "Robert DiCicco"
          },
          {
+            "id" : "Robert Ransbottom",
             "name" : "Robert Ransbottom",
             "data" : [
                [
                   "Raku",
                   2
                ]
+            ]
+         },
+         {
+            "name" : "Roger Bell_West",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ]
             ],
-            "id" : "Robert Ransbottom"
+            "id" : "Roger Bell_West"
          },
          {
-            "name" : "Solathian",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
+            "name" : "Solathian",
             "id" : "Solathian"
          },
          {
-            "name" : "Steven Wilson",
             "data" : [
                [
                   "Perl",
                   1
                ]
             ],
+            "name" : "Steven Wilson",
             "id" : "Steven Wilson"
          },
          {
-            "id" : "Thomas Kohler",
             "data" : [
                [
                   "Perl",
@@ -333,11 +446,10 @@
                   2
                ]
             ],
-            "name" : "Thomas Kohler"
+            "name" : "Thomas Kohler",
+            "id" : "Thomas Kohler"
          },
          {
-            "id" : "Ulrich Rieke",
-            "name" : "Ulrich Rieke",
             "data" : [
                [
                   "Perl",
@@ -347,10 +459,13 @@
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "name" : "Ulrich Rieke",
+            "id" : "Ulrich Rieke"
          },
          {
             "id" : "W. Luis Mochan",
+            "name" : "W. Luis Mochan",
             "data" : [
                [
                   "Perl",
@@ -360,29 +475,20 @@
                   "Blog",
                   1
                ]
-            ],
-            "name" : "W. Luis Mochan"
+            ]
          }
       ]
    },
-   "plotOptions" : {
-      "series" : {
-         "borderWidth" : 0,
-         "dataLabels" : {
-            "format" : "{point.y}",
-            "enabled" : 1
-         }
-      }
+   "title" : {
+      "text" : "The Weekly Challenge - 225"
    },
    "subtitle" : {
-      "text" : "[Champions: 20] Last updated at 2023-07-13 03:00:10 GMT"
+      "text" : "[Champions: 26] Last updated at 2023-07-14 05:01:38 GMT"
    },
-   "tooltip" : {
-      "followPointer" : 1,
-      "pointFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>",
-      "headerFormat" : "<span style='font-size:11px'>{series.name}</span><br/>"
+   "legend" : {
+      "enabled" : 0
    },
-   "chart" : {
-      "type" : "column"
+   "xAxis" : {
+      "type" : "category"
    }
 }
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index 2f29c29207..990510a798 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -1,27 +1,9 @@
 {
-   "subtitle" : {
-      "text" : "Last updated at 2023-07-13 03:00:10 GMT"
-   },
-   "tooltip" : {
-      "pointFormat" : "<b>{point.y:.0f}</b>"
-   },
    "chart" : {
       "type" : "column"
    },
-   "yAxis" : {
-      "min" : 0,
-      "title" : {
-         "text" : null
-      }
-   },
-   "xAxis" : {
-      "type" : "category",
-      "labels" : {
-         "style" : {
-            "fontSize" : "13px",
-            "fontFamily" : "Verdana, sans-serif"
-         }
-      }
+   "tooltip" : {
+      "pointFormat" : "<b>{point.y:.0f}</b>"
    },
    "series" : [
       {
@@ -29,35 +11,53 @@
          "data" : [
             [
                "Blog",
-               3732
+               3736
             ],
             [
                "Perl",
-               11483
+               11494
             ],
             [
                "Raku",
-               6612
+               6619
             ]
          ],
          "dataLabels" : {
-            "rotation" : -90,
-            "align" : "right",
-            "enabled" : "true",
+            "color" : "#FFFFFF",
             "y" : 10,
+            "format" : "{point.y:.0f}",
             "style" : {
                "fontSize" : "13px",
                "fontFamily" : "Verdana, sans-serif"
             },
-            "color" : "#FFFFFF",
-            "format" : "{point.y:.0f}"
+            "align" : "right",
+            "rotation" : -90,
+            "enabled" : "true"
          }
       }
    ],
-   "title" : {
-      "text" : "The Weekly Challenge Contributions [2019 - 2023]"
+   "yAxis" : {
+      "min" : 0,
+      "title" : {
+         "text" : null
+      }
+   },
+   "xAxis" : {
+      "type" : "category",
+      "labels" : {
+         "style" : {
+            "fontSize" : "13px",
+            "fontFamily" : "Verdana, sans-serif"
+         }
+      }
+   },
+   "subtitle" : {
+      "text" : "Last updated at 2023-07-14 05:01:38 GMT"
    },
    "legend" : {
       "enabled" : "false"
+   },
+   "title" : {
+      "text" : "The Weekly Challenge Contributions [2019 - 2023]"
    }
 }
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index de2c25c79a..d5f18537bf 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,28 +1,33 @@
 {
-   "chart" : {
-      "type" : "column"
+   "title" : {
+      "text" : "The Weekly Challenge Language"
    },
-   "tooltip" : {
-      "pointFormat" : "<span style=\"color:{point.color}\">Challenge {point.name}</span>: <b>{point.y:f}</b><br/>",
-      "headerFormat" : "<span style=\"font-size:11px\"></span>",
-      "followPointer" : "true"
+   "xAxis" : {
+      "type" : "category"
+   },
+   "legend" : {
+      "enabled" : "false"
    },
    "subtitle" : {
-      "text" : "Click the columns to drilldown the language breakdown. Last updated at 2023-07-13 03:00:10 GMT"
+      "text" : "Click the columns to drilldown the language breakdown. Last updated at 2023-07-14 05:01:38 GMT"
+   },
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
    },
    "plotOptions" : {
       "series" : {
          "borderWidth" : 0,
          "dataLabels" : {
-            "format" : "{point.y}",
-            "enabled" : 1
+            "enabled" : 1,
+            "format" : "{point.y}"
          }
       }
    },
    "drilldown" : {
       "series" : [
          {
-            "id" : "001",
             "name" : "001",
             "data" : [
                [
@@ -37,7 +42,8 @@
                   "Blog",
                   11
                ]
-            ]
+            ],
+            "id" : "001"
          },
          {
             "data" : [
@@ -59,6 +65,7 @@
          },
          {
             "id" : "003",
+            "name" : "003",
             "data" : [
                [
                   "Perl",
@@ -72,11 +79,9 @@
                   "Blog",
                   9
                ]
-            ],
-            "name" : "003"
+            ]
          },
          {
-            "id" : "004",
             "name" : "004",
             "data" : [
                [
@@ -91,10 +96,11 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "id" : "004"
          },
          {
-            "name" : "005",
+            "id" : "005",
             "data" : [
                [
                   "Perl",
@@ -109,10 +115,10 @@
                   12
                ]
             ],
-            "id" : "005"
+            "name" : "005"
          },
          {
-            "id" : "006",
+            "name" : "006",
             "data" : [
                [
                   "Perl",
@@ -127,10 +133,9 @@
                   7
                ]
             ],
-            "name" : "006"
+            "id" : "006"
          },
          {
-            "id" : "007",
             "name" : "007",
             "data" : [
                [
@@ -145,10 +150,10 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "id" : "007"
          },
          {
-            "id" : "008",
             "name" : "008",
             "data" : [
                [
@@ -163,9 +168,11 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "id" : "008"
          },
          {
+            "id" : "009",
             "name" : "009",
             "data" : [
                [
@@ -180,11 +187,9 @@
                   "Blog",
                   13
                ]
-            ],
-            "id" : "009"
+            ]
          },
          {
-            "name" : "010",
             "data" : [
                [
                   "Perl",
@@ -199,10 +204,10 @@
                   11
                ]
             ],
+            "name" : "010",
             "id" : "010"
          },
          {
-            "id" : "011",
             "name" : "011",
             "data" : [
                [
@@ -217,10 +222,11 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "id" : "011"
          },
          {
-            "name" : "012",
+            "id" : "012",
             "data" : [
                [
                   "Perl",
@@ -235,7 +241,7 @@
                   11
                ]
             ],
-            "id" : "012"
+            "name" : "012"
          },
          {
             "id" : "013",
@@ -257,6 +263,7 @@
          },
          {
             "id" : "014",
+            "name" : "014",
             "data" : [
                [
                   "Perl",
@@ -270,11 +277,9 @@
                   "Blog",
                   15
                ]
-            ],
-            "name" : "014"
+            ]
          },
          {
-            "name" : "015",
             "data" : [
                [
                   "Perl",
@@ -289,11 +294,11 @@
                   15
                ]
             ],
+            "name" : "015",
             "id" : "015"
          },
          {
             "id" : "016",
-            "name" : "016",
             "data" : [
                [
                   "Perl",
@@ -307,9 +312,11 @@
                   "Blog",
                   13
                ]
-            ]
+            ],
+            "name" : "016"
          },
          {
+            "name" : "017",
             "data" : [
                [
                   "Perl",
@@ -324,12 +331,10 @@
                   12
                ]
             ],
-            "name" : "017",
             "id" : "017"
          },
          {
             "id" : "018",
-            "name" : "018",
             "data" : [
                [
                   "Perl",
@@ -343,9 +348,11 @@
                   "Blog",
                   14
                ]
-            ]
+            ],
+            "name" : "018"
          },
          {
+            "id" : "019",
             "name" : "019",
             "data" : [
                [
@@ -360,10 +367,10 @@
                   "Blog",
                   13
                ]
-            ],
-            "id" : "019"
+            ]
          },
          {
+            "name" : "020",
             "data" : [
                [
                   "Perl",
@@ -378,10 +385,11 @@
                   13
                ]
             ],
-            "name" : "020",
             "id" : "020"
          },
          {
+            "id" : "021",
+            "name" : "021",
             "data" : [
                [