diff --git a/planetwars-server/src/db/bots.rs b/planetwars-server/src/db/bots.rs
index baabd5a..d99a459 100644
--- a/planetwars-server/src/db/bots.rs
+++ b/planetwars-server/src/db/bots.rs
@@ -34,6 +34,10 @@ pub fn find_bots_by_owner(owner_id: i32, conn: &PgConnection) -> QueryResult<Vec
         .get_results(conn)
 }
 
+pub fn find_bot_by_name(name: &str, conn: &PgConnection) -> QueryResult<Bot> {
+    bots::table.filter(bots::name.eq(name)).first(conn)
+}
+
 pub fn find_all_bots(conn: &PgConnection) -> QueryResult<Vec<Bot>> {
     // TODO: filter out bots that cannot be run (have no valid code bundle associated with them)
     bots::table.get_results(conn)
diff --git a/planetwars-server/src/routes/demo.rs b/planetwars-server/src/routes/demo.rs
index 28eab97..8642577 100644
--- a/planetwars-server/src/routes/demo.rs
+++ b/planetwars-server/src/routes/demo.rs
@@ -1,10 +1,12 @@
-use crate::db::matches::{self, MatchState};
+use crate::db;
+use crate::db::matches::MatchState;
 use crate::modules::bots::save_code_bundle;
 use crate::util::gen_alphanumeric;
 use crate::{ConnectionPool, BOTS_DIR, MAPS_DIR, MATCHES_DIR};
 use axum::extract::Extension;
 use axum::Json;
 use hyper::StatusCode;
+use planetwars_matchrunner::BotSpec;
 use planetwars_matchrunner::{docker_runner::DockerBotSpec, run_match, MatchConfig, MatchPlayer};
 use serde::{Deserialize, Serialize};
 use std::path::PathBuf;
@@ -12,7 +14,7 @@ use std::path::PathBuf;
 use super::matches::ApiMatch;
 
 const PYTHON_IMAGE: &'static str = "python:3.10-slim-buster";
-const SIMPLEBOT_PATH: &'static str = "../simplebot";
+const OPPONENT_NAME: &'static str = "simplebot";
 
 #[derive(Serialize, Deserialize, Debug)]
 pub struct SubmitBotParams {
@@ -26,6 +28,16 @@ pub struct SubmitBotResponse {
     pub match_data: ApiMatch,
 }
 
+fn code_bundle_to_botspec(code_bundle: &db::bots::CodeBundle) -> Box<dyn BotSpec> {
+    let bundle_path = PathBuf::from(BOTS_DIR).join(&code_bundle.path);
+
+    Box::new(DockerBotSpec {
+        code_path: bundle_path,
+        image: PYTHON_IMAGE.to_string(),
+        argv: vec!["python".to_string(), "bot.py".to_string()],
+    })
+}
+
 /// submit python code for a bot, which will face off
 /// with a demo bot. Return a played match.
 pub async fn submit_bot(
@@ -34,12 +46,16 @@ pub async fn submit_bot(
 ) -> Result<Json<SubmitBotResponse>, StatusCode> {
     let conn = pool.get().await.expect("could not get database connection");
 
-    let code_bundle = save_code_bundle(&params.code, None, &conn)
+    let opponent =
+        db::bots::find_bot_by_name(OPPONENT_NAME, &conn).expect("could not find opponent bot");
+    let opponent_code_bundle =
+        db::bots::active_code_bundle(opponent.id, &conn).expect("opponent bot has no code bundles");
+
+    let player_code_bundle = save_code_bundle(&params.code, None, &conn)
         // TODO: can we recover from this?
         .expect("could not save bot code");
 
     let log_file_name = format!("{}.log", gen_alphanumeric(16));
-    let uploaded_bot_dir = PathBuf::from(BOTS_DIR).join(&code_bundle.path);
     // play the match
     let match_config = MatchConfig {
         map_path: PathBuf::from(MAPS_DIR).join("hex.json"),
@@ -48,31 +64,23 @@ pub async fn submit_bot(
         players: vec![
             MatchPlayer {
                 name: "player".to_string(),
-                bot_spec: Box::new(DockerBotSpec {
-                    code_path: uploaded_bot_dir,
-                    image: PYTHON_IMAGE.to_string(),
-                    argv: vec!["python".to_string(), "bot.py".to_string()],
-                }),
+                bot_spec: code_bundle_to_botspec(&player_code_bundle),
             },
             MatchPlayer {
-                name: "simplebot".to_string(),
-                bot_spec: Box::new(DockerBotSpec {
-                    code_path: PathBuf::from(SIMPLEBOT_PATH),
-                    image: PYTHON_IMAGE.to_string(),
-                    argv: vec!["python".to_string(), "simplebot.py".to_string()],
-                }),
+                name: OPPONENT_NAME.to_string(),
+                bot_spec: code_bundle_to_botspec(&opponent_code_bundle),
             },
         ],
     };
 
     // store match in database
-    let new_match_data = matches::NewMatch {
+    let new_match_data = db::matches::NewMatch {
         state: MatchState::Playing,
         log_path: &log_file_name,
     };
     // TODO: set match players
     let match_data =
-        matches::create_match(&new_match_data, &[], &conn).expect("failed to create match");
+        db::matches::create_match(&new_match_data, &[], &conn).expect("failed to create match");
 
     tokio::spawn(run_match_task(
         match_data.base.id,
@@ -92,6 +100,6 @@ async fn run_match_task(match_id: i32, match_config: MatchConfig, connection_poo
         .get()
         .await
         .expect("could not get database connection");
-    matches::set_match_state(match_id, MatchState::Finished, &conn)
+    db::matches::set_match_state(match_id, MatchState::Finished, &conn)
         .expect("failed to update match state");
 }