diff --git a/common/js/common-core/score-core.d.ts b/common/js/common-core/score-core.d.ts
new file mode 100644
index 000000000..53b7460fd
--- /dev/null
+++ b/common/js/common-core/score-core.d.ts
@@ -0,0 +1,3 @@
+import { ScoreDocument } from "..";
+import { ICollection } from "monk";
+export declare function AutoCoerce(collection: ICollection<ScoreDocument>, scores: ScoreDocument[]): Promise<ScoreDocument[]>;
diff --git a/common/js/common-core/score-core.js b/common/js/common-core/score-core.js
new file mode 100644
index 000000000..5b392ae44
--- /dev/null
+++ b/common/js/common-core/score-core.js
@@ -0,0 +1,55 @@
+"use strict";
+var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
+    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
+    return new (P || (P = Promise))(function (resolve, reject) {
+        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
+        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
+        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
+    });
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.AutoCoerce = void 0;
+function AutoCoerce(collection, scores) {
+    return __awaiter(this, void 0, void 0, function* () {
+        let notPBsArr = [];
+        for (const s of scores) {
+            if (!s.isLampPB) {
+                notPBsArr.push({
+                    userID: s.userID,
+                    chartID: s.chartID,
+                    isLampPB: true,
+                });
+            }
+        }
+        if (notPBsArr.length === 0) {
+            return scores;
+        }
+        let lampPBsArr = yield collection.find({
+            $or: notPBsArr,
+        });
+        let lampPBs = new Map();
+        for (const score of lampPBsArr) {
+            lampPBs.set(`${score.userID}-${score.chartID}`, score);
+        }
+        for (const score of scores) {
+            if (!score.isLampPB) {
+                let lampPB = lampPBs.get(`${score.userID}-${score.chartID}`);
+                if (lampPB) {
+                    score.scoreData.lamp = lampPB.scoreData.lamp;
+                    score.scoreData.lampIndex = lampPB.scoreData.lampIndex;
+                    score.calculatedData.lampRating = lampPB.calculatedData.lampRating;
+                    // not too happy about this, this is a sign
+                    // of something not properly being generalised.
+                    if (score.game === "bms") {
+                        score.calculatedData.rating = lampPB.calculatedData.rating;
+                    }
+                    score.isLampPB = true;
+                }
+            }
+        }
+        return scores;
+    });
+}
+exports.AutoCoerce = AutoCoerce;
+//# sourceMappingURL=score-core.js.map
\ No newline at end of file
diff --git a/common/js/common-core/score-core.js.map b/common/js/common-core/score-core.js.map
new file mode 100644
index 000000000..3c5f31c22
--- /dev/null
+++ b/common/js/common-core/score-core.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"score-core.js","sourceRoot":"","sources":["../../src/common-core/score-core.ts"],"names":[],"mappings":";;;;;;;;;;;;AAGA,SAAsB,UAAU,CAC5B,UAAsC,EACtC,MAAuB;;QAEvB,IAAI,SAAS,GAAG,EAAE,CAAC;QAEnB,KAAK,MAAM,CAAC,IAAI,MAAM,EAAE;YACpB,IAAI,CAAC,CAAC,CAAC,QAAQ,EAAE;gBACb,SAAS,CAAC,IAAI,CAAC;oBACX,MAAM,EAAE,CAAC,CAAC,MAAM;oBAChB,OAAO,EAAE,CAAC,CAAC,OAAO;oBAClB,QAAQ,EAAE,IAAI;iBACjB,CAAC,CAAC;aACN;SACJ;QAED,IAAI,SAAS,CAAC,MAAM,KAAK,CAAC,EAAE;YACxB,OAAO,MAAM,CAAC;SACjB;QAED,IAAI,UAAU,GAAG,MAAM,UAAU,CAAC,IAAI,CAAC;YACnC,GAAG,EAAE,SAAS;SACjB,CAAC,CAAC;QAEH,IAAI,OAAO,GAA+B,IAAI,GAAG,EAAE,CAAC;QACpD,KAAK,MAAM,KAAK,IAAI,UAAU,EAAE;YAC5B,OAAO,CAAC,GAAG,CAAC,GAAG,KAAK,CAAC,MAAM,IAAI,KAAK,CAAC,OAAO,EAAE,EAAE,KAAK,CAAC,CAAC;SAC1D;QAED,KAAK,MAAM,KAAK,IAAI,MAAM,EAAE;YACxB,IAAI,CAAC,KAAK,CAAC,QAAQ,EAAE;gBACjB,IAAI,MAAM,GAAG,OAAO,CAAC,GAAG,CAAC,GAAG,KAAK,CAAC,MAAM,IAAI,KAAK,CAAC,OAAO,EAAE,CAAC,CAAC;gBAE7D,IAAI,MAAM,EAAE;oBACR,KAAK,CAAC,SAAS,CAAC,IAAI,GAAG,MAAM,CAAC,SAAS,CAAC,IAAI,CAAC;oBAC7C,KAAK,CAAC,SAAS,CAAC,SAAS,GAAG,MAAM,CAAC,SAAS,CAAC,SAAS,CAAC;oBACvD,KAAK,CAAC,cAAc,CAAC,UAAU,GAAG,MAAM,CAAC,cAAc,CAAC,UAAU,CAAC;oBAEnE,2CAA2C;oBAC3C,+CAA+C;oBAC/C,IAAI,KAAK,CAAC,IAAI,KAAK,KAAK,EAAE;wBACtB,KAAK,CAAC,cAAc,CAAC,MAAM,GAAG,MAAM,CAAC,cAAc,CAAC,MAAM,CAAC;qBAC9D;oBACD,KAAK,CAAC,QAAQ,GAAG,IAAI,CAAC;iBACzB;aACJ;SACJ;QAED,OAAO,MAAM,CAAC;IAClB,CAAC;CAAA;AAjDD,gCAiDC"}
\ No newline at end of file
diff --git a/common/js/index.d.ts b/common/js/index.d.ts
index 5d60d2631..5207ec1b1 100644
--- a/common/js/index.d.ts
+++ b/common/js/index.d.ts
@@ -2,3 +2,4 @@ export * from "./types";
 export * as config from "./config";
 export * as gameClasses from "./game-classes";
 export * as ESDCore from "./common-core/esd-core";
+export * as ScoreCore from "./common-core/score-core";
diff --git a/common/js/index.js b/common/js/index.js
index 72e69fe51..c92fa1134 100644
--- a/common/js/index.js
+++ b/common/js/index.js
@@ -22,9 +22,10 @@ var __importStar = (this && this.__importStar) || function (mod) {
     return result;
 };
 Object.defineProperty(exports, "__esModule", { value: true });
-exports.ESDCore = exports.gameClasses = exports.config = void 0;
+exports.ScoreCore = exports.ESDCore = exports.gameClasses = exports.config = void 0;
 __exportStar(require("./types"), exports);
 exports.config = __importStar(require("./config"));
 exports.gameClasses = __importStar(require("./game-classes"));
 exports.ESDCore = __importStar(require("./common-core/esd-core"));
+exports.ScoreCore = __importStar(require("./common-core/score-core"));
 //# sourceMappingURL=index.js.map
\ No newline at end of file
diff --git a/common/js/index.js.map b/common/js/index.js.map
index 19b3b3d63..dbb126e57 100644
--- a/common/js/index.js.map
+++ b/common/js/index.js.map
@@ -1 +1 @@
-{"version":3,"file":"index.js","sourceRoot":"","sources":["../src/index.ts"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;AAAA,0CAAwB;AAExB,mDAAmC;AACnC,8DAA8C;AAC9C,kEAAkD"}
\ No newline at end of file
+{"version":3,"file":"index.js","sourceRoot":"","sources":["../src/index.ts"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;AAAA,0CAAwB;AAExB,mDAAmC;AACnC,8DAA8C;AAC9C,kEAAkD;AAClD,sEAAsD"}
\ No newline at end of file
diff --git a/common/src/common-core/score-core.ts b/common/src/common-core/score-core.ts
new file mode 100644
index 000000000..465d20ff3
--- /dev/null
+++ b/common/src/common-core/score-core.ts
@@ -0,0 +1,53 @@
+import { ScoreDocument } from "..";
+import { ICollection } from "monk";
+
+export async function AutoCoerce(
+    collection: ICollection<ScoreDocument>,
+    scores: ScoreDocument[]
+): Promise<ScoreDocument[]> {
+    let notPBsArr = [];
+
+    for (const s of scores) {
+        if (!s.isLampPB) {
+            notPBsArr.push({
+                userID: s.userID,
+                chartID: s.chartID,
+                isLampPB: true,
+            });
+        }
+    }
+
+    if (notPBsArr.length === 0) {
+        return scores;
+    }
+
+    let lampPBsArr = await collection.find({
+        $or: notPBsArr,
+    });
+
+    let lampPBs: Map<string, ScoreDocument> = new Map();
+    for (const score of lampPBsArr) {
+        lampPBs.set(`${score.userID}-${score.chartID}`, score);
+    }
+
+    for (const score of scores) {
+        if (!score.isLampPB) {
+            let lampPB = lampPBs.get(`${score.userID}-${score.chartID}`);
+
+            if (lampPB) {
+                score.scoreData.lamp = lampPB.scoreData.lamp;
+                score.scoreData.lampIndex = lampPB.scoreData.lampIndex;
+                score.calculatedData.lampRating = lampPB.calculatedData.lampRating;
+
+                // not too happy about this, this is a sign
+                // of something not properly being generalised.
+                if (score.game === "bms") {
+                    score.calculatedData.rating = lampPB.calculatedData.rating;
+                }
+                score.isLampPB = true;
+            }
+        }
+    }
+
+    return scores;
+}
diff --git a/common/src/index.ts b/common/src/index.ts
index b9a082b50..c47b0173a 100644
--- a/common/src/index.ts
+++ b/common/src/index.ts
@@ -3,3 +3,4 @@ export * from "./types";
 export * as config from "./config";
 export * as gameClasses from "./game-classes";
 export * as ESDCore from "./common-core/esd-core";
+export * as ScoreCore from "./common-core/score-core";