diff --git a/src/lib/solver.spec.ts b/src/lib/solver.spec.ts
index 1dad996..234b94c 100644
--- a/src/lib/solver.spec.ts
+++ b/src/lib/solver.spec.ts
@@ -2,7 +2,7 @@ import t from "tap";
 
 import { ExpectedOutcome, FinalOutcome, Player } from "./datatypes.ts";
 import { computeAllSolutions, getPreferredNextOutcome } from "./solver.ts";
-import { getBoardOutcome } from "./tictactoe-rules.ts";
+import { rules } from "./tictactoe-rules.ts";
 
 void t.test("getPreferredNextOutcome", async (t) => {
   const nextOutcomes: ExpectedOutcome[] = [
@@ -102,9 +102,7 @@ void t.test("computeAllSolutions", async (t) => {
     expectedSolutions: Record<string, ExpectedOutcome>,
   ) => {
     t.matchOnlyStrict(
-      Object.fromEntries(
-        computeAllSolutions(rows, columns, { getBoardOutcome }).entries(),
-      ),
+      Object.fromEntries(computeAllSolutions(rows, columns, rules).entries()),
       expectedSolutions,
     );
   };
@@ -115,9 +113,7 @@ void t.test("computeAllSolutions", async (t) => {
     expectedSolutionsCount: number,
     expectedSolutionsIncomplete: Record<string, ExpectedOutcome>,
   ) => {
-    const allSolutions = computeAllSolutions(rows, columns, {
-      getBoardOutcome,
-    });
+    const allSolutions = computeAllSolutions(rows, columns, rules);
     t.equal(allSolutions.size, expectedSolutionsCount);
     t.matchStrict(
       Object.fromEntries(allSolutions.entries()),
diff --git a/src/lib/tictactoe-rules.ts b/src/lib/tictactoe-rules.ts
index 31b79f1..9691de9 100644
--- a/src/lib/tictactoe-rules.ts
+++ b/src/lib/tictactoe-rules.ts
@@ -87,3 +87,7 @@ export const getBoardOutcome: GameRules["getBoardOutcome"] = (board) => {
 
   return CurrentOutcome.Draw;
 };
+
+export const rules: GameRules = {
+  getBoardOutcome,
+};