diff --git a/Cargo.lock b/Cargo.lock
index a5f1a0d..5a699ce 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -484,9 +484,12 @@ dependencies = [
 name = "tidepool"
 version = "0.1.0"
 dependencies = [
+ "fish",
  "mino",
  "rand",
  "rand_xoshiro",
+ "tracing",
+ "tracing-subscriber",
 ]
 
 [[package]]
@@ -497,9 +500,21 @@ checksum = "8ce8c33a8d48bd45d624a6e523445fd21ec13d3653cd51f681abf67418f54eb8"
 dependencies = [
  "cfg-if",
  "pin-project-lite",
+ "tracing-attributes",
  "tracing-core",
 ]
 
+[[package]]
+name = "tracing-attributes"
+version = "0.1.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4017f8f45139870ca7e672686113917c71c7a6e02d4924eda67186083c03081a"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "tracing-core"
 version = "0.1.30"
diff --git a/tidepool/Cargo.toml b/tidepool/Cargo.toml
index a005240..1450ef9 100644
--- a/tidepool/Cargo.toml
+++ b/tidepool/Cargo.toml
@@ -6,5 +6,10 @@ edition = "2021"
 
 [dependencies]
 mino = { path = "../mino" }
+fish = { path = "../fish" }
+
 rand = "0.8"
-rand_xoshiro = "0.6"
\ No newline at end of file
+rand_xoshiro = "0.6"
+
+tracing = { version = "0.1" }
+tracing-subscriber = { version = "0.3", features = ["fmt", "env-filter"]}
diff --git a/tidepool/src/main.rs b/tidepool/src/main.rs
new file mode 100644
index 0000000..75f6a07
--- /dev/null
+++ b/tidepool/src/main.rs
@@ -0,0 +1,91 @@
+use fish::ai;
+use rand::Rng as _;
+use tidepool::sim;
+
+struct RngSeed([u8; 32]);
+
+impl rand::distributions::Distribution<RngSeed> for rand::distributions::Standard {
+    fn sample<R: rand::Rng + ?Sized>(&self, rng: &mut R) -> RngSeed {
+        RngSeed(self.sample(rng))
+    }
+}
+
+impl std::fmt::Display for RngSeed {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        self.0.iter().try_for_each(|&b| write!(f, "{b:02x}"))
+    }
+}
+
+pub fn main() -> std::io::Result<()> {
+    const AI_CYCLES: usize = 5_000;
+    const GOAL: usize = 50;
+
+    tracing_subscriber::fmt::fmt()
+        .with_writer(std::io::stderr)
+        .with_env_filter(tracing_subscriber::filter::EnvFilter::from_default_env())
+        .init();
+
+    let seed = rand::thread_rng().gen::<RngSeed>();
+    println!("using seed: {seed}");
+
+    let mut sim = sim::Simul::new(seed.0, sim::Options::jstris(GOAL));
+
+    let mut ds = 0;
+    let mut ps = 0;
+
+    loop {
+        let (hold, next) = sim.queue();
+        let hold_str = hold.map_or("", |p| p.name());
+        let next_str = next.iter().map(|p| p.as_char()).collect::<String>();
+        println!("Q: [{hold_str}]{next_str}");
+
+        let mat = sim.matrix();
+        for y in (0..mat.rows() + 1).rev() {
+            print!("{y:2} |");
+            for x in 0..10 {
+                print!("{}", if mat.get(x, y) { '#' } else { '.' });
+            }
+            println!();
+        }
+
+        let ll = sim.lines_left();
+
+        let mut ai = ai::Ai::new(mat, &next, hold);
+        for i in 0..AI_CYCLES {
+            if i > 0 && i % 1000 == 0 {
+                tracing::debug!("iteration {i}");
+            }
+
+            if ai.think().is_err() {
+                break;
+            }
+        }
+
+        let mut best = ai.suggestion();
+        let best = best.nth(0);
+
+        if let Some(pc) = best {
+            sim.play(pc);
+        } else {
+            println!("no suggestion!");
+            break;
+        }
+
+        ds += ll - sim.lines_left();
+        ps += 1;
+        print!("#{ps}, ds: {ds}");
+        if ds > 0 {
+            print!(", ppd: {:.2}", ps as f64 / ds as f64);
+        }
+        println!();
+
+        if ll == 0 {
+            break;
+        }
+    }
+
+    println!();
+    println!("pieces: {ps}");
+
+    Ok(())
+}