From 6f3012bcc5128d52ba23058dcff0cb7f759eaf1f Mon Sep 17 00:00:00 2001
From: "Steinar H. Gunderson" <sgunderson@bigfoot.com>
Date: Sat, 20 Dec 2014 18:27:01 +0100
Subject: [PATCH] Show an adjusted human index instead of the raw percentage of
 computer games.

---
 www/js/book.js       |  7 +++++--
 www/opening-stats.pl | 14 +++++++++++++-
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/www/js/book.js b/www/js/book.js
index cc948fd..c6290f1 100644
--- a/www/js/book.js
+++ b/www/js/book.js
@@ -93,7 +93,7 @@ var headings = [
 	[ "Games", TYPE_INTEGER ],
 	[ "%", TYPE_RATIO ],
 	[ "CGames", TYPE_INTEGER ],
-	[ "Comp%", TYPE_RATIO ],
+	[ "Hum", TYPE_RATIO ],
 	[ "Win%", TYPE_RATIO ],
 	[ "WWin", TYPE_INTEGER ],
 	[ "%WW", TYPE_RATIO ],
@@ -177,7 +177,10 @@ var show_lines = function(data, game) {
 		line.push(num);  // N.
 		line.push(num / total_num);  // %.
 		line.push(computer);  // CGames.
-		line.push(computer / num);  // Comp%.
+
+		// Adjust so that the human index is 50% overall.
+		var exp = Math.log(0.5) / Math.log(data['computer_games'] / data['total_games']);
+		line.push(1.0 - Math.pow(computer / num, exp));  // Hum.
 
 		// Win%.
 		var white_win_ratio = (white + 0.5 * draw) / num;
diff --git a/www/opening-stats.pl b/www/opening-stats.pl
index aea5db8..ad578a0 100755
--- a/www/opening-stats.pl
+++ b/www/opening-stats.pl
@@ -68,8 +68,20 @@ for my $move (@{$root_aux_data->{'moves'}}) {
 	push @json_moves, $json_pos;
 }
 
+# Get stats for the root position, for the human index.
+my $start_pos = Position->start_pos;
+my ($json_start_pos, undef) = get_json_move($start_pos, 0, $chld_in, $chld_out);
+my $total_games = $json_start_pos->{'white'} + $json_start_pos->{'draw'} + $json_start_pos->{'black'};
+my $computer_games = $json_start_pos->{'computer'} * 1;
+
 print $cgi->header(-type=>'application/json');
-print JSON::XS::encode_json({ moves => \@json_moves, opening => $opening, root_game => $root_game });
+print JSON::XS::encode_json({
+	moves => \@json_moves,
+	opening => $opening,
+	root_game => $root_game,
+	total_games => $total_games,
+	computer_games => $computer_games
+});
 
 sub read_openings {
 	open my $fh, "../openings.txt"
-- 
2.39.2