diff --git a/fish-webworker/Cargo.lock b/fish-webworker/Cargo.lock
index 310626b..0b6c328 100644
--- a/fish-webworker/Cargo.lock
+++ b/fish-webworker/Cargo.lock
@@ -61,6 +61,7 @@ name = "fish-webworker"
 version = "0.1.0"
 dependencies = [
  "fish",
+ "mino",
  "wasm-bindgen",
  "wasm-bindgen-macro",
  "wee_alloc",
diff --git a/fish-webworker/Cargo.toml b/fish-webworker/Cargo.toml
index 4017507..2d5eb4a 100644
--- a/fish-webworker/Cargo.toml
+++ b/fish-webworker/Cargo.toml
@@ -9,6 +9,7 @@ crate-type = ["cdylib"]
 
 [dependencies]
 fish = { path = "../fish" }
+mino = { path = "../mino" }
 
 wasm-bindgen = "0.2"
 wasm-bindgen-macro = "0.2"
diff --git a/fish-webworker/src/lib.rs b/fish-webworker/src/lib.rs
index d81041f..e12819f 100644
--- a/fish-webworker/src/lib.rs
+++ b/fish-webworker/src/lib.rs
@@ -1,7 +1,9 @@
 use std::{cell::RefCell, mem::MaybeUninit};
 use wasm_bindgen_macro::wasm_bindgen;
 
-use fish::Weights;
+use fish::{Bot, Weights};
+use mino::srs::{PieceType, Queue};
+use mino::{MatBuf, Rot};
 
 #[global_allocator]
 static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
@@ -13,18 +15,22 @@ struct State {
 
 static mut STATE: MaybeUninit<RefCell<State>> = MaybeUninit::uninit();
 
-fn state() -> &'static RefCell<State> {
-    unsafe { STATE.assume_init_ref() }
+impl State {
+    fn new() -> RefCell<State> {
+        RefCell::new(State {
+            weights: Weights::default(),
+            max_iters: 10_000,
+        })
+    }
+
+    fn get() -> &'static RefCell<State> {
+        unsafe { STATE.assume_init_ref() }
+    }
 }
 
 #[wasm_bindgen(start)]
 fn start() {
-    let init_state = State {
-        weights: Weights::default(),
-        max_iters: 10_000,
-    };
-
-    unsafe { STATE.write(RefCell::new(init_state)) };
+    unsafe { STATE.write(State::new()) };
 }
 
 #[wasm_bindgen]
@@ -34,8 +40,71 @@ pub fn get_version() -> String {
 
 #[wasm_bindgen]
 pub fn get_config() -> Vec<i32> {
-    let state = state().borrow();
+    let state = State::get().borrow();
     let mut config = Vec::from(state.weights.0);
     config.push(state.max_iters as i32);
     config
 }
+
+#[wasm_bindgen]
+pub fn suggest(matrix: String, hold: String, next: String) -> Result<String, String> {
+    let matrix = parse_matrix(&matrix);
+    let hold = parse_hold(&hold)?;
+    let next = parse_queue(&next)?;
+    let queue = Queue::new(hold, &next);
+
+    let state = State::get().borrow();
+
+    let res = {
+        let mut bot = Bot::new(&state.weights, &matrix, queue);
+        bot.think(state.max_iters);
+        bot.suggest().ok_or("No suggestion found")?
+    };
+
+    Ok(format!(
+        "{x},{y},{r},{ty}",
+        x = res.loc.x,
+        y = res.loc.y,
+        r = rot(res.loc.r),
+        ty = res.ty
+    ))
+}
+
+fn rot(r: Rot) -> &'static str {
+    match r {
+        Rot::N => "spawn",
+        Rot::E => "right",
+        Rot::S => "reverse",
+        Rot::W => "left",
+    }
+}
+
+fn parse_matrix(s: &str) -> MatBuf {
+    s.bytes()
+        .take(400)
+        .enumerate()
+        .filter(|(_, c)| *c != b' ')
+        .map(|(i, _)| ((i % 10) as i16, (i / 10) as i16))
+        .fold(MatBuf::new(), |mut mat, (x, y)| {
+            mat.set(x, y);
+            mat
+        })
+}
+
+fn parse_hold(s: &str) -> Result<Option<PieceType>, &'static str> {
+    match s.len() {
+        0 => Ok(None),
+        1 => {
+            let c = s.as_bytes()[0];
+            let ty = PieceType::try_from(c as char).map_err(|_| "Unrecognized hold piece")?;
+            Ok(Some(ty))
+        }
+        _ => Err("Expected hold piece to be a single character"),
+    }
+}
+
+fn parse_queue(s: &str) -> Result<Vec<PieceType>, &'static str> {
+    s.bytes()
+        .map(|c| PieceType::try_from(c as char).map_err(|_| "Unrecognized next piece"))
+        .collect()
+}
diff --git a/fish-webworker/src/worker.js b/fish-webworker/src/worker.js
index ceab301..7ec8729 100644
--- a/fish-webworker/src/worker.js
+++ b/fish-webworker/src/worker.js
@@ -2,6 +2,7 @@ import {
     default as init,
     get_version as getVersion,
     get_config as getConfig,
+    suggest,
 } from '../build/fish_webworker.js'
 
 let initPromise = init('/blockfish.wasm');
@@ -16,6 +17,14 @@ async function handle(msg) {
             return { version, config: { weights, maxIters } };
         }
 
+    case 'suggest':
+        {
+            let res = suggest(msg.state.matrix, msg.state.hold, msg.state.next);
+            let [x, y, r, type] = res.split(',');
+            x = +x, y = +y;
+            return { moves: [{ x, y, r, type }] };
+        }
+
     default:
         throw `Unrecognized message "${msg.type}"`;
     }