- Added solutions by Arne Sommer.

- Added blog post by James Smith.
- Added solutions by Bob Lied.
- Added solutions by Dave Jacoby.
- Added solutions by E. Choroba.
- Added solutions by Ali Moradi.
- Added solutions by Marton Polgar.
- Added solutions by Luca Ferrari.
- Added solutions by Pip Stuart.
- Added solutions by Peter Campbell Smith.
- Added solutions by Robbie Hatley.
- Added solutions by Stephen G. Lynn.
- Added solutions by Rawley Fowler.

26 files changed, 2719 insertions, 2394 deletions

diff --git a/challenge-198/eric-cheung/python/ch-1.py b/challenge-198/eric-cheung/python/ch-1.py
new file mode 100755
index 0000000000..34d0347180
--- /dev/null
+++ b/challenge-198/eric-cheung/python/ch-1.py
@@ -0,0 +1,12 @@
+

+arrInputList = [2, 5, 8, 1]  ## Example 1

+## arrInputList = [3]  ## Example 2

+

+arrInputList.sort()

+arrDiff = [arrInputList[nIndx + 1] - arrInputList[nIndx] for nIndx in range(0, len(arrInputList) - 1)]

+

+if len(arrDiff) > 0:

+    nMaxArrDiff = max(arrDiff)

+    print (arrDiff.count(nMaxArrDiff))

+else:

+    print (0)

diff --git a/challenge-198/eric-cheung/python/ch-2.py b/challenge-198/eric-cheung/python/ch-2.py
new file mode 100755
index 0000000000..315da4e457
--- /dev/null
+++ b/challenge-198/eric-cheung/python/ch-2.py
@@ -0,0 +1,11 @@
+

+from sympy import isprime

+

+## nInput = 10  ## Example 1

+## nInput = 15  ## Example 2

+## nInput = 1  ## Example 3

+nInput = 25  ## Example 4

+

+arrPrime = [nLoop for nLoop in range(2, nInput) if isprime(nLoop)]

+

+print (len(arrPrime))

diff --git a/challenge-198/laurent-rosenfeld/blog.txt b/challenge-198/laurent-rosenfeld/blog.txt
new file mode 100644
index 0000000000..792185b39e
--- /dev/null
+++ b/challenge-198/laurent-rosenfeld/blog.txt
@@ -0,0 +1 @@
+https://blogs.perl.org/users/laurent_r/2023/01/perl-weekly-challenge-198-max-gap-and-prime-count.html
diff --git a/challenge-198/laurent-rosenfeld/perl/ch-1.pl b/challenge-198/laurent-rosenfeld/perl/ch-1.pl
new file mode 100644
index 0000000000..b99e96ef36
--- /dev/null
+++ b/challenge-198/laurent-rosenfeld/perl/ch-1.pl
@@ -0,0 +1,20 @@
+use strict;
+use warnings;
+use feature qw/say/;
+
+sub max_gap  {
+    return 0 if scalar @_ < 2;
+    my @sorted = sort { $a <=> $b } @_;
+    my %gaps;
+    for my $i (1..$#sorted) {
+        push @{$gaps{$sorted[$i] - $sorted[$i-1]}}, $i;
+    }
+    my $max_gap = 0;
+    for my $k (keys %gaps) {
+        $max_gap = $k if $k > $max_gap;
+    }
+    return scalar @{$gaps{$max_gap}};
+}
+for my $test ([<2 5 8 1>], [<2 7>], [3,], [<12 2 6 5 15 9>]) {
+    printf "%-20s => %d\n", "@$test", max_gap @$test;
+}
diff --git a/challenge-198/laurent-rosenfeld/perl/ch-2.pl b/challenge-198/laurent-rosenfeld/perl/ch-2.pl
new file mode 100644
index 0000000000..d0903cf706
--- /dev/null
+++ b/challenge-198/laurent-rosenfeld/perl/ch-2.pl
@@ -0,0 +1,18 @@
+use strict;
+use warnings;
+use feature qw/say/;
+
+sub is_prime {
+    my $num = shift;
+    for my $i (2 .. $num ** .5) {
+        return 0 if $num % $i == 0;
+    }
+    return 1;
+}
+sub count_primes {
+    my $n = shift;
+    return scalar grep is_prime($_), 2..$n;
+}
+for my $i (<10 15 1 25>) {
+    say "$i \t => ", count_primes $i;
+}
diff --git a/challenge-198/laurent-rosenfeld/raku/ch-1.raku b/challenge-198/laurent-rosenfeld/raku/ch-1.raku
new file mode 100644
index 0000000000..c7a6fef8e5
--- /dev/null
+++ b/challenge-198/laurent-rosenfeld/raku/ch-1.raku
@@ -0,0 +1,13 @@
+sub max-gap (@in) {
+    return 0 if @in.elems < 2;
+    my @sorted = sort @in;
+    my %gaps;
+    for 1..@sorted.end -> $i {
+        push %gaps, ( @sorted[$i] - @sorted[$i-1] => $i );
+    }
+    my $max-gap = %gaps.keys.max;
+    return %gaps{$max-gap}.elems;
+}
+for <2 5 8 1>, <2 7>, (3,), <12 2 6 5 15 9> -> @test {
+    say (~@test).fmt("%-20s => "), max-gap @test;
+}
diff --git a/challenge-198/laurent-rosenfeld/raku/ch-2.raku b/challenge-198/laurent-rosenfeld/raku/ch-2.raku
new file mode 100644
index 0000000000..91128040f7
--- /dev/null
+++ b/challenge-198/laurent-rosenfeld/raku/ch-2.raku
@@ -0,0 +1,6 @@
+sub count-primes (Int $n) {
+    return (grep ({.is-prime}), 1..$n).elems;
+}
+for <10 15 1 25> -> $i {
+    say "$i \t => ", count-primes $i;
+}
diff --git a/challenge-198/rawleyfowler/README.md b/challenge-198/rawleyfowler/README.md
index f55ad6c829..4d4b3f88f8 100644
--- a/challenge-198/rawleyfowler/README.md
+++ b/challenge-198/rawleyfowler/README.md
@@ -1,5 +1,5 @@
 ## How to run
 ```bash
-raku task1.raku '2 5 8 1' # Find gap pairs
-raku task2.raku '100'     # Find primes
+raku raku/ch-1.raku '2 5 8 1' # Find gap pairs
+raku raku/ch-2.raku '100'     # Find primes
 ```
diff --git a/challenge-198/rawleyfowler/task1.raku b/challenge-198/rawleyfowler/raku/ch-1.raku
index e3f2468cec..e3f2468cec 100644
--- a/challenge-198/rawleyfowler/task1.raku
+++ b/challenge-198/rawleyfowler/raku/ch-1.raku
diff --git a/challenge-198/rawleyfowler/task2.raku b/challenge-198/rawleyfowler/raku/ch-2.raku
index b7116610e4..b7116610e4 100644
--- a/challenge-198/rawleyfowler/task2.raku
+++ b/challenge-198/rawleyfowler/raku/ch-2.raku
diff --git a/members.json b/members.json
index 2051211f5c..88ccd36d4d 100644
--- a/members.json
+++ b/members.json
@@ -209,6 +209,7 @@
     "rage311"               : "Rage311",
     "randy-lauen"           : "Randy Lauen",
     "rakulius"              : "Rakulius",
+    "rawleyfowler"          : "Rawley Fowler",
     "finanalyst"            : "Richard Hainsworth",
     "richard-park"          : "Richard Park",
     "rick-bychowski"        : "Rick Bychowski",
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index 9be6a0ca3c..cb889b5c52 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -16,30 +16,211 @@
    "xAxis" : {
       "type" : "category"
    },
-   "subtitle" : {
-      "text" : "[Champions: 10] Last updated at 2023-01-02 21:15:10 GMT"
-   },
-   "title" : {
-      "text" : "The Weekly Challenge - 198"
-   },
-   "legend" : {
-      "enabled" : 0
+   "series" : [
+      {
+         "data" : [
+            {
+               "y" : 4,
+               "drilldown" : "Ali Moradi",
+               "name" : "Ali Moradi"
+            },
+            {
+               "name" : "Arne Sommer",
+               "y" : 3,
+               "drilldown" : "Arne Sommer"
+            },
+            {
+               "y" : 2,
+               "drilldown" : "Bob Lied",
+               "name" : "Bob Lied"
+            },
+            {
+               "drilldown" : "Bruce Gray",
+               "y" : 2,
+               "name" : "Bruce Gray"
+            },
+            {
+               "drilldown" : "Dave Jacoby",
+               "y" : 3,
+               "name" : "Dave Jacoby"
+            },
+            {
+               "drilldown" : "David Ferrone",
+               "y" : 2,
+               "name" : "David Ferrone"
+            },
+            {
+               "y" : 2,
+               "drilldown" : "E. Choroba",
+               "name" : "E. Choroba"
+            },
+            {
+               "drilldown" : "James Smith",
+               "y" : 3,
+               "name" : "James Smith"
+            },
+            {
+               "drilldown" : "Laurent Rosenfeld",
+               "y" : 5,
+               "name" : "Laurent Rosenfeld"
+            },
+            {
+               "drilldown" : "Luca Ferrari",
+               "y" : 8,
+               "name" : "Luca Ferrari"
+            },
+            {
+               "name" : "Mark Anderson",
+               "drilldown" : "Mark Anderson",
+               "y" : 2
+            },
+            {
+               "name" : "Marton Polgar",
+               "drilldown" : "Marton Polgar",
+               "y" : 2
+            },
+            {
+               "name" : "Niels van Dijke",
+               "drilldown" : "Niels van Dijke",
+               "y" : 2
+            },
+            {
+               "name" : "Peter Campbell Smith",
+               "y" : 3,
+               "drilldown" : "Peter Campbell Smith"
+            },
+            {
+               "y" : 2,
+               "drilldown" : "Pip Stuart",
+               "name" : "Pip Stuart"
+            },
+            {
+               "name" : "Rawley Fowler",
+               "drilldown" : "Rawley Fowler",
+               "y" : 2
+            },
+            {
+               "name" : "Robbie Hatley",
+               "drilldown" : "Robbie Hatley",
+               "y" : 3
+            },
+            {
+               "drilldown" : "Robert DiCicco",
+               "y" : 2,
+               "name" : "Robert DiCicco"
+            },
+            {
+               "y" : 4,
+               "drilldown" : "Roger Bell_West",
+               "name" : "Roger Bell_West"
+            },
+            {
+               "name" : "Stephen G. Lynn",
+               "y" : 5,
+               "drilldown" : "Stephen G. Lynn"
+            },
+            {
+               "name" : "Thomas Kohler",
+               "drilldown" : "Thomas Kohler",
+               "y" : 4
+            },
+            {
+               "y" : 4,
+               "drilldown" : "Ulrich Rieke",
+               "name" : "Ulrich Rieke"
+            },
+            {
+               "drilldown" : "W. Luis Mochan",
+               "y" : 3,
+               "name" : "W. Luis Mochan"
+            }
+         ],
+         "name" : "The Weekly Challenge - 198",
+         "colorByPoint" : 1
+      }
+   ],
+   "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/>"
    },
    "drilldown" : {
       "series" : [
          {
-            "name" : "Bruce Gray",
+            "id" : "Ali Moradi",
+            "name" : "Ali Moradi",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ]
+            ]
+         },
+         {
             "data" : [
                [
                   "Raku",
                   2
+               ],
+               [
+                  "Blog",
+                  1
                ]
             ],
+            "id" : "Arne Sommer",
+            "name" : "Arne Sommer"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
+            "id" : "Bob Lied",
+            "name" : "Bob Lied"
+         },
+         {
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "name" : "Bruce Gray",
             "id" : "Bruce Gray"
          },
          {
-            "id" : "David Ferrone",
+            "id" : "Dave Jacoby",
+            "name" : "Dave Jacoby",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ],
             "name" : "David Ferrone",
+            "id" : "David Ferrone"
+         },
+         {
+            "name" : "E. Choroba",
+            "id" : "E. Choroba",
             "data" : [
                [
                   "Perl",
@@ -48,17 +229,49 @@
             ]
          },
          {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
             "id" : "James Smith",
-            "name" : "James Smith",
+            "name" : "James Smith"
+         },
+         {
             "data" : [
                [
                   "Perl",
                   2
                ],
                [
+                  "Raku",
+                  2
+               ],
+               [
                   "Blog",
                   1
                ]
+            ],
+            "name" : "Laurent Rosenfeld",
+            "id" : "Laurent Rosenfeld"
+         },
+         {
+            "id" : "Luca Ferrari",
+            "name" : "Luca Ferrari",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  6
+               ]
             ]
          },
          {
@@ -72,18 +285,74 @@
             "id" : "Mark Anderson"
          },
          {
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ],
+            "id" : "Marton Polgar",
+            "name" : "Marton Polgar"
+         },
+         {
+            "name" : "Niels van Dijke",
             "id" : "Niels van Dijke",
             "data" : [
                [
                   "Perl",
                   2
                ]
+            ]
+         },
+         {
+            "id" : "Peter Campbell Smith",
+            "name" : "Peter Campbell Smith",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
             ],
-            "name" : "Niels van Dijke"
+            "id" : "Pip Stuart",
+            "name" : "Pip Stuart"
+         },
+         {
+            "name" : "Rawley Fowler",
+            "id" : "Rawley Fowler",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Robbie Hatley",
+            "name" : "Robbie Hatley"
          },
          {
-            "id" : "Robert DiCicco",
-            "name" : "Robert DiCicco",
             "data" : [
                [
                   "Perl",
@@ -93,9 +362,12 @@
                   "Raku",
                   1
                ]
-            ]
+            ],
+            "name" : "Robert DiCicco",
+            "id" : "Robert DiCicco"
          },
          {
+            "id" : "Roger Bell_West",
             "name" : "Roger Bell_West",
             "data" : [
                [
@@ -106,11 +378,27 @@
                   "Raku",
                   2
                ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
             ],
-            "id" : "Roger Bell_West"
+            "id" : "Stephen G. Lynn",
+            "name" : "Stephen G. Lynn"
          },
          {
-            "name" : "Thomas Kohler",
             "data" : [
                [
                   "Perl",
@@ -121,9 +409,11 @@
                   2
                ]
             ],
+            "name" : "Thomas Kohler",
             "id" : "Thomas Kohler"
          },
          {
+            "id" : "Ulrich Rieke",
             "name" : "Ulrich Rieke",
             "data" : [
                [
@@ -134,12 +424,11 @@
                   "Raku",
                   2
                ]
-            ],
-            "id" : "Ulrich Rieke"
+            ]
          },
          {
-            "id" : "W. Luis Mochan",
             "name" : "W. Luis Mochan",
+            "id" : "W. Luis Mochan",
             "data" : [
                [
                   "Perl",
@@ -153,70 +442,16 @@
          }
       ]
    },
-   "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/>"
+   "subtitle" : {
+      "text" : "[Champions: 23] Last updated at 2023-01-05 20:28:32 GMT"
    },
-   "series" : [
-      {
-         "name" : "The Weekly Challenge - 198",
-         "data" : [
-            {
-               "y" : 2,
-               "drilldown" : "Bruce Gray",
-               "name" : "Bruce Gray"
-            },
-            {
-               "drilldown" : "David Ferrone",
-               "y" : 2,
-               "name" : "David Ferrone"
-            },
-            {
-               "y" : 3,
-               "drilldown" : "James Smith",
-               "name" : "James Smith"
-            },
-            {
-               "name" : "Mark Anderson",
-               "y" : 2,
-               "drilldown" : "Mark Anderson"
-            },
-            {
-               "drilldown" : "Niels van Dijke",
-               "y" : 2,
-               "name" : "Niels van Dijke"
-            },
-            {
-               "name" : "Robert DiCicco",
-               "y" : 2,
-               "drilldown" : "Robert DiCicco"
-            },
-            {
-               "y" : 4,
-               "drilldown" : "Roger Bell_West",
-               "name" : "Roger Bell_West"
-            },
-            {
-               "name" : "Thomas Kohler",
-               "drilldown" : "Thomas Kohler",
-               "y" : 4
-            },
-            {
-               "drilldown" : "Ulrich Rieke",
-               "y" : 4,
-               "name" : "Ulrich Rieke"
-            },
-            {
-               "drilldown" : "W. Luis Mochan",
-               "y" : 3,
-               "name" : "W. Luis Mochan"
-            }
-         ],
-         "colorByPoint" : 1
-      }
-   ],
    "chart" : {
       "type" : "column"
+   },
+   "title" : {
+      "text" : "The Weekly Challenge - 198"
+   },
+   "legend" : {
+      "enabled" : 0
    }
 }
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index 72909d4722..64d0599675 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -1,63 +1,63 @@
 {
-   "tooltip" : {
-      "pointFormat" : "<b>{point.y:.0f}</b>"
+   "subtitle" : {
+      "text" : "Last updated at 2023-01-05 20:28:32 GMT"
+   },
+   "chart" : {
+      "type" : "column"
+   },
+   "title" : {
+      "text" : "The Weekly Challenge Contributions [2019 - 2022]"
+   },
+   "legend" : {
+      "enabled" : "false"
+   },
+   "yAxis" : {
+      "min" : 0,
+      "title" : {
+         "text" : null
+      }
+   },
+   "xAxis" : {
+      "type" : "category",
+      "labels" : {
+         "style" : {
+            "fontSize" : "13px",
+            "fontFamily" : "Verdana, sans-serif"
+         }
+      }
    },
    "series" : [
       {
+         "name" : "Contributions",
          "dataLabels" : {
             "enabled" : "true",
-            "color" : "#FFFFFF",
             "rotation" : -90,
             "style" : {
                "fontSize" : "13px",
                "fontFamily" : "Verdana, sans-serif"
             },
+            "color" : "#FFFFFF",
             "align" : "right",
             "format" : "{point.y:.0f}",
             "y" : 10
          },
-         "name" : "Contributions",
          "data" : [
             [
                "Blog",
-               3160
+               3172
             ],
             [
                "Perl",
-               9713
+               9731
             ],
             [
                "Raku",
-               5824
+               5838
             ]
          ]
       }
    ],
-   "chart" : {
-      "type" : "column"
-   },
-   "yAxis" : {
-      "title" : {
-         "text" : null
-      },
-      "min" : 0
-   },
-   "xAxis" : {
-      "labels" : {
-         "style" : {
-            "fontSize" : "13px",
-            "fontFamily" : "Verdana, sans-serif"
-         }
-      },
-      "type" : "category"
-   },
-   "subtitle" : {
-      "text" : "Last updated at 2023-01-02 21:15:10 GMT"
-   },
-   "title" : {
-      "text" : "The Weekly Challenge Contributions [2019 - 2022]"
-   },
-   "legend" : {
-      "enabled" : "false"
+   "tooltip" : {
+      "pointFormat" : "<b>{point.y:.0f}</b>"
    }
 }
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index 01e636982b..9944fad43a 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,1014 +1,21 @@
 {
-   "series" : [
-      {
-         "data" : [
-            {
-               "name" : "#001",
-               "drilldown" : "001",
-               "y" : 161
-            },
-            {
-               "name" : "#002",
-               "drilldown" : "002",
-               "y" : 125
-            },
-            {
-               "drilldown" : "003",
-               "y" : 83,
-               "name" : "#003"
-            },
-            {
-               "name" : "#004",
-               "y" : 99,
-               "drilldown" : "004"
-            },
-            {
-               "drilldown" : "005",
-               "y" : 78,
-               "name" : "#005"
-            },
-            {
-               "y" : 58,
-               "drilldown" : "006",
-               "name" : "#006"
-            },
-            {
-               "y" : 65,
-               "drilldown" : "007",
-               "name" : "#007"
-            },
-            {
-               "name" : "#008",
-               "drilldown" : "008",
-               "y" : 78
-            },
-            {
-               "y" : 76,
-               "drilldown" : "009",
-               "name" : "#009"
-            },
-            {
-               "drilldown" : "010",
-               "y" : 65,
-               "name" : "#010"
-            },
-            {
-               "y" : 85,
-               "drilldown" : "011",
-               "name" : "#011"
-            },
-            {
-               "drilldown" : "012",
-               "y" : 89,
-               "name" : "#012"
-            },
-            {
-               "drilldown" : "013",
-               "y" : 85,
-               "name" : "#013"
-            },
-            {
-               "drilldown" : "014",
-               "y" : 101,
-               "name" : "#014"
-            },
-            {
-               "name" : "#015",
-               "drilldown" : "015",
-               "y" : 99
-            },
-            {
-               "drilldown" : "016",
-               "y" : 71,
-               "name" : "#016"
-            },
-            {
-               "name" : "#017",
-               "y" : 84,
-               "drilldown" : "017"
-            },
-            {
-               "name" : "#018",
-               "drilldown" : "018",
-               "y" : 81
-            },
-            {
-               "y" : 103,
-               "drilldown" : "019",
-               "name" : "#019"
-            },
-            {
-               "name" : "#020",
-               "drilldown" : "020",
-               "y" : 101
-            },
-            {
-               "y" : 72,
-               "drilldown" : "021",
-               "name" : "#021"
-            },
-            {
-               "name" : "#022",
-               "drilldown" : "022",
-               "y" : 68
-            },
-            {
-               "y" : 97,
-               "drilldown" : "023",
-               "name" : "#023"
-            },
-            {
-               "y" : 75,
-               "drilldown" : "024",
-               "name" : "#024"
-            },
-            {
-               "y" : 59,
-               "drilldown" : "025",
-               "name" : "#025"
-            },
-            {
-               "name" : "#026",
-               "y" : 74,
-               "drilldown" : "026"
-            },
-            {
-               "drilldown" : "027",
-               "y" : 62,
-               "name" : "#027"
-            },
-            {
-               "name" : "#028",
-               "y" : 82,
-               "drilldown" : "028"
-            },
-            {
-               "drilldown" : "029",
-               "y" : 81,
-               "name" : "#029"
-            },
-            {
-               "name" : "#030",
-               "drilldown" : "030",
-               "y" : 119
-            },
-            {
-               "name" : "#031",
-               "y" : 91,
-               "drilldown" : "031"
-            },
-