Upgrade to Sunsetter8 (fixes #2199)

.gitmodules

@@ -31,9 +31,6 @@
 [submodule "public/vendor/stockfish.js"]
 	path = public/vendor/stockfish.js
 	url = https://github.com/niklasf/stockfish.js
-[submodule "public/vendor/Sunsetter"]
-	path = public/vendor/Sunsetter
-	url = https://github.com/niklasf/Sunsetter.git
 [submodule "public/vendor/flatpickr"]
 	path = public/vendor/flatpickr
 	url = https://github.com/chmln/flatpickr
@@ -43,3 +40,7 @@
 [submodule "public/visualizer"]
 	path = public/visualizer
 	url = https://github.com/ornicar/chess_game_visualizer
+[submodule "public/vendor/Sunsetter8"]
+	path = public/vendor/Sunsetter8
+	url = https://github.com/niklasf/Sunsetter8
+	branch = js

public/vendor/Sunsetter

@@ -1 +0,0 @@
-Subproject commit db96881581000cb03ccc6b8173a3cf0b89078bc3

public/vendor/Sunsetter8

@@ -0,0 +1 @@
+Subproject commit 3744246dd1edcb061228030247887ab86f0153cc

ui/analyse/src/ceval/sunsetterWorker.js

@@ -61,20 +61,14 @@ module.exports = function(opts, name) {
 
     // transform mate scores
     if (Math.abs(cp) > 20000) {
-      mate = Math.floor((30000 - Math.abs(cp)) / 10);
+      mate = Math.floor((30000 - Math.abs(cp)) / 10) + 1;
       // approx depth for searches that end early with mate
       depth = Math.max(depth || 0, mate * 2 - 1);
       // correct sign and add sunsetter played moves
-      mate = Math.sign(cp) * (mate + aiMoves)
+      mate = Math.sign(cp) * (mate + aiMoves);
       cp = undefined;
     }
 
-    if (mate) {
-      stopping = true
-      send('force');
-      send('tellics stopped');
-    }
-
     work.emit({
       work: work,
       eval: {
@@ -89,7 +83,7 @@ module.exports = function(opts, name) {
 
   var reboot = function() {
     if (instance) instance.terminate();
-    instance = new Worker('/assets/vendor/Sunsetter/sunsetter.js');
+    instance = new Worker('/assets/vendor/Sunsetter8/sunsetter.js');
     busy = false;
     stopping = false;
     aiMoves = 0;
@@ -102,8 +96,9 @@ module.exports = function(opts, name) {
     start: function(work) {
       if (busy) reboot();
       busy = true;
-      send('variant ' + opts.variant.key);
+      send('reset ' + opts.variant.key);
       send('setboard ' + work.initialFen);
+      send('easy');
       send('force');
       for (var i = 0; i < work.moves.length; i++) {
         send(work.moves[i]);