diff --git a/convex/prompts.ts b/convex/prompts.ts
index 94d6cfb..67bf9ee 100644
--- a/convex/prompts.ts
+++ b/convex/prompts.ts
@@ -61,11 +61,7 @@ The 2d Grid is made up of characters, where each character has a meaning.
   "boxCoordinates": [[ROW, COL], [ROW, COL]],
   "playerCoordinates": [ROW, COL],
   "reasoning": "REASONING"
-}
-
-# MOST IMPORTANT RULE
-
-- DO NOT TRY TO PUT A BLOCK OR A PLAYER IN A LOCATION THAT IS ALREADY OCCUPIED`;
+}`;
 
 export type Prompt = {
   _id: Id<"prompts">;
diff --git a/models/claude-3-5-sonnet.ts b/models/claude-3-5-sonnet.ts
index 268ba51..196423e 100644
--- a/models/claude-3-5-sonnet.ts
+++ b/models/claude-3-5-sonnet.ts
@@ -1,4 +1,4 @@
-import { type ModelHandler } from ".";
+import { type ModelHandler, getValidLocations } from ".";
 import { Anthropic } from "@anthropic-ai/sdk";
 import { z } from "zod";
 
@@ -22,7 +22,11 @@ export const claude35sonnet: ModelHandler = async (prompt, map, config) => {
     messages: [
       {
         role: "user",
-        content: JSON.stringify(map),
+        content: `
+Grid: ${JSON.stringify(map)}
+
+Valid Locations: ${JSON.stringify(getValidLocations(map))}
+`,
       },
     ],
   });
@@ -33,7 +37,11 @@ export const claude35sonnet: ModelHandler = async (prompt, map, config) => {
     throw new Error("Unexpected completion type from Claude");
   }
 
-  const parsedContent = JSON.parse(content.text);
+  const jsonStartIndex = content.text.indexOf("{");
+  const jsonEndIndex = content.text.lastIndexOf("}") + 1;
+  const jsonString = content.text.substring(jsonStartIndex, jsonEndIndex);
+
+  const parsedContent = JSON.parse(jsonString);
   const response = await responseSchema.safeParseAsync(parsedContent);
 
   if (!response.success) {
diff --git a/models/gemini-1.5-pro.ts b/models/gemini-1.5-pro.ts
index 75740ed..cba3561 100644
--- a/models/gemini-1.5-pro.ts
+++ b/models/gemini-1.5-pro.ts
@@ -1,4 +1,4 @@
-import { type ModelHandler } from ".";
+import { type ModelHandler, getValidLocations } from ".";
 import { GoogleGenerativeAI, SchemaType } from "@google/generative-ai";
 
 interface GeminiResponse {
@@ -62,7 +62,11 @@ export const gemini15pro: ModelHandler = async (prompt, map, config) => {
     },
   });
 
-  const result = await model.generateContent(JSON.stringify(map));
+  const result = await model.generateContent(`
+Grid: ${JSON.stringify(map)}
+
+Valid Locations: ${JSON.stringify(getValidLocations(map))}
+`);
   const parsedResponse = JSON.parse(result.response.text()) as GeminiResponse;
 
   return {
diff --git a/models/gpt-4o.ts b/models/gpt-4o.ts
index 969431d..b9d2a2b 100644
--- a/models/gpt-4o.ts
+++ b/models/gpt-4o.ts
@@ -1,4 +1,4 @@
-import { type ModelHandler } from ".";
+import { type ModelHandler, getValidLocations } from ".";
 import OpenAI from "openai";
 import { zodResponseFormat } from "openai/helpers/zod";
 import { z } from "zod";
@@ -24,7 +24,11 @@ export const gpt4o: ModelHandler = async (prompt, map, config) => {
       },
       {
         role: "user",
-        content: JSON.stringify(map),
+        content: `
+Grid: ${JSON.stringify(map)}
+
+Valid Locations: ${JSON.stringify(getValidLocations(map))}
+`,
       },
     ],
     response_format: zodResponseFormat(responseSchema, "game_map"),
diff --git a/models/index.ts b/models/index.ts
index 4cd0dd7..2d25e5a 100644
--- a/models/index.ts
+++ b/models/index.ts
@@ -12,6 +12,17 @@ export interface ModelHandlerConfig {
   topP: number;
 }
 
+export function getValidLocations(map: string[][]) {
+  return map.flatMap((row, y) =>
+    row.reduce((acc, cell, x) => {
+      if (cell === " ") {
+        acc.push([y, x]);
+      }
+      return acc;
+    }, [] as number[][]),
+  );
+}
+
 export type ModelHandler = (
   prompt: string,
   map: string[][],
diff --git a/models/mistral-large-2.ts b/models/mistral-large-2.ts
index 58b7ea8..7a67f7b 100644
--- a/models/mistral-large-2.ts
+++ b/models/mistral-large-2.ts
@@ -1,4 +1,4 @@
-import { type ModelHandler } from ".";
+import { type ModelHandler, getValidLocations } from ".";
 import { isJSON } from "../lib/utils";
 import { Mistral } from "@mistralai/mistralai";
 import { z } from "zod";
@@ -24,7 +24,11 @@ export const mistralLarge2: ModelHandler = async (prompt, map, config) => {
       },
       {
         role: "user",
-        content: JSON.stringify(map),
+        content: `
+Grid: ${JSON.stringify(map)}
+
+Valid Locations: ${JSON.stringify(getValidLocations(map))}
+`,
       },
     ],
     responseFormat: {
diff --git a/models/perplexity-llama-3.1.ts b/models/perplexity-llama-3.1.ts
index 288ffdf..1ea4016 100644
--- a/models/perplexity-llama-3.1.ts
+++ b/models/perplexity-llama-3.1.ts
@@ -1,6 +1,6 @@
 import { isJSON } from "../lib/utils";
 import { z } from "zod";
-import { ModelHandler } from "./index";
+import { ModelHandler, getValidLocations } from "./index";
 
 const completionSchema = z.object({
   id: z.string(),
@@ -49,7 +49,11 @@ export const perplexityLlama31: ModelHandler = async (prompt, map, config) => {
         { role: "system", content: prompt },
         {
           role: "user",
-          content: JSON.stringify(map),
+          content: `
+Grid: ${JSON.stringify(map)}
+
+Valid Locations: ${JSON.stringify(getValidLocations(map))}
+`,
         },
       ],
       max_tokens: config.maxTokens,