diff --git a/public/src/js/assets.js b/public/src/js/assets.js
index e363842..6245548 100644
--- a/public/src/js/assets.js
+++ b/public/src/js/assets.js
@@ -24,6 +24,7 @@ var assets = {
 		"canvastest.js",
 		"canvascache.js",
 		"parsetja.js",
+		"autoscore.js",
 		"about.js",
 		"debug.js",
 		"session.js",
diff --git a/public/src/js/autoscore.js b/public/src/js/autoscore.js
new file mode 100644
index 0000000..6837651
--- /dev/null
+++ b/public/src/js/autoscore.js
@@ -0,0 +1,155 @@
+class AutoScore { 
+	constructor(difficulty, level, scoremode, circles) {
+		this.scoremode = scoremode;
+		this.circles = circles;
+		this.basic_max_score_list = {
+			oni: [
+				1200000,
+				700000,
+				750000,
+				800000,
+				850000,
+				900000,
+				950000,
+				1000000,
+				1050000,
+				1100000,
+				1200000
+			],
+			ura: [
+				1200000,
+				700000,
+				750000,
+				800000,
+				850000,
+				900000,
+				950000,
+				1000000,
+				1050000,
+				1100000,
+				1200000
+			],
+			hard: [
+				900000,
+				550000,
+				600000,
+				650000,
+				700000,
+				750000,
+				800000,
+				850000,
+				900000,
+			],
+			normal: [
+				700000,
+				400000,
+				450000,
+				500000,
+				550000,
+				600000,
+				650000,
+				700000,
+			],
+			easy: [
+				380000,
+				300000,
+				320000,
+				340000,
+				360000,
+				380000,
+			]
+		}
+		const target = this.GetTargetScore(difficulty, level);
+		this.Score = 0;
+		this.ScoreDiff = 0;
+		this.ScoreInit = 0;
+		const max_possible_init = Math.ceil(target / this.GetMaxCombo() / 10) * 10;
+		//console.log(target);
+		for (var init = 100; init <= max_possible_init; init += 10) { 
+			for (var diff = 10; diff < init; diff++) { 
+				const score = this.TryScore(init, diff);
+				if (score > target && Math.abs(score - target) < Math.abs(this.Score - target)) { 
+					this.Score = score;
+					this.ScoreInit = init;
+					this.ScoreDiff = diff;
+					//console.log(init, diff, score);
+				}
+				if (score > target) { 
+					break;
+				}
+			}
+		}
+	}
+	IsCommonCircle(circle) { 
+		const ty = circle.type;
+		return ty === "don" || ty === "ka" || ty === "daiDon" || ty === "daiKa";
+	}
+	TryScore(init, diff) { 
+		var score = 0;
+		var combo = 0;
+		for (var circle of this.circles) { 
+			if (circle.branch && circle.branch.name !== "master") { 
+				continue;
+			}
+			if (this.IsCommonCircle(circle)) { 
+				combo++;
+				if (combo % 100 === 0 && this.scoremode !== 1) { 
+					score += 10000;
+				}
+			}
+			var diff_mul = 0;
+			var multiplier = circle.gogoTime ? 1.2 : 1;
+			if (this.scoremode === 1) {
+				diff_mul = Math.max(0, Math.floor((Math.min(combo, 100) - 1) / 10));
+			} else { 
+				if (combo >= 100) {
+					diff_mul = 8;
+				} else if (combo >= 50) {
+					diff_mul = 4;
+				} else if (combo >= 30) {
+					diff_mul = 2;
+				} else if (combo >= 10) {
+					diff_mul = 1;
+				}
+			}
+			switch (circle.type) { 
+				case "don":
+				case "ka": { 
+					score += Math.floor((init + diff * diff_mul) * multiplier / 10) * 10;
+					break;
+				}
+				case "daiDon":
+				case "daiKa": { 
+					score += Math.floor((init + diff * diff_mul) * multiplier / 5) * 10;
+					break;
+				}
+				case "balloon": { 
+					score += (5000 + 300 * circle.requiredHits) * multiplier;
+					break;
+				}
+				default: { 
+					break;
+				}
+			}
+		}
+		return score;
+	}
+	GetTargetScore(difficulty, level) { 
+		//console.log(difficulty, level)
+		var ret = this.basic_max_score_list[difficulty][level];
+		if (!ret) { 
+			ret = this.basic_max_score_list[difficulty][0];
+		}
+		return ret;
+	}
+	GetMaxCombo() { 
+		var combo = 0;
+		for (var circle of this.circles) { 
+			//alert(this.IsCommonCircle(circle));
+			if (this.IsCommonCircle(circle) && (!circle.branch || circle.branch.name === "master")) { 
+				combo++;
+			}
+		}
+		return combo;
+	}
+}
diff --git a/public/src/js/controller.js b/public/src/js/controller.js
index cf253b4..3b0852e 100644
--- a/public/src/js/controller.js
+++ b/public/src/js/controller.js
@@ -14,7 +14,7 @@ class Controller{
 		if(selectedSong.type === "tja"){
 			this.parsedSongData = new ParseTja(songData, selectedSong.difficulty, selectedSong.offset)
 		}else{
-			this.parsedSongData = new ParseOsu(songData, selectedSong.offset)
+			this.parsedSongData = new ParseOsu(songData, selectedSong.difficulty, selectedSong.offset)
 		}
 		this.offset = this.parsedSongData.soundOffset
 		
diff --git a/public/src/js/importsongs.js b/public/src/js/importsongs.js
index 112b675..288cece 100644
--- a/public/src/js/importsongs.js
+++ b/public/src/js/importsongs.js
@@ -283,7 +283,7 @@
 		var reader = new FileReader()
 		var promise = pageEvents.load(reader).then(event => {
 			var data = event.target.result.replace(/\0/g, "").split("\n")
-			var osu = new ParseOsu(data, 0, true)
+			var osu = new ParseOsu(data, "oni", 0, true);
 			var dir = file.webkitRelativePath.toLowerCase()
 			dir = dir.slice(0, dir.lastIndexOf("/") + 1)
 			var songObj = {
diff --git a/public/src/js/parseosu.js b/public/src/js/parseosu.js
index b8d94e2..bf5a4a4 100644
--- a/public/src/js/parseosu.js
+++ b/public/src/js/parseosu.js
@@ -1,5 +1,5 @@
 class ParseOsu{
-	constructor(fileContent, offset, metaOnly){
+	constructor(fileContent, difficulty, offset, metaOnly){
 		this.osu = {
 			OFFSET: 0,
 			MSPERBEAT: 1,
@@ -52,6 +52,7 @@ class ParseOsu{
 		this.metadata = this.parseMetadata()
 		this.editor = this.parseEditor()
 		this.difficulty = this.parseDifficulty()
+		this._difficulty = difficulty;
 		if(!metaOnly){
 			this.timingPoints = this.parseTiming()
 			this.circles = this.parseCircles()
@@ -354,6 +355,10 @@ class ParseOsu{
 				console.warn("Unknown note type found on line " + (i + 1) + ": " + this.data[i])
 			}
 		}
+		this.scoremode = 2;
+		var autoscore = new AutoScore(this._difficulty, this.difficulty.overallDifficulty, 2, circles);
+		this.scoreinit = autoscore.ScoreInit;
+		this.scorediff = autoscore.ScoreDiff;
 		return circles
 	}
 }
diff --git a/public/src/js/parsetja.js b/public/src/js/parsetja.js
index 31bc67e..9071ad9 100644
--- a/public/src/js/parsetja.js
+++ b/public/src/js/parsetja.js
@@ -122,11 +122,6 @@
 	}
 	parseCircles(){
 		var meta = this.metadata[this.difficulty]
-		this.scoreinit = meta.scoreinit;
-		this.scorediff = meta.scorediff;
-		if (this.scoreinit && this.scorediff) { 
-			this.scoremode = meta.scoremode || 1;
-		}
 		var ms = (meta.offset || 0) * -1000 + this.offset
 		var bpm = Math.abs(meta.bpm) || 120
 		var scroll = 1
@@ -453,6 +448,16 @@
 			this.measures.sort((a, b) => a.ms > b.ms ? 1 : -1)
 			circles.forEach((circle, i) => circle.id = i + 1)
 		}
+		this.scoreinit = meta.scoreinit;
+		this.scorediff = meta.scorediff;
+		if (this.scoreinit && this.scorediff) {
+			this.scoremode = meta.scoremode || 1;
+		} else { 
+			this.scoremode = meta.scoremode || 2;
+			var autoscore = new AutoScore(this.difficulty, meta.level, this.scoremode, circles);
+			this.scoreinit = autoscore.ScoreInit;
+			this.scorediff = autoscore.ScoreDiff;
+		}
 		return circles
 	}
 }