diff --git a/.gitignore b/.gitignore
index 1440ad9..7517520 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,3 +13,13 @@ code-guessing/analytics/people
 */counts-old.csv
 */*.png
 *.zst
+tacnet.sqlite3
+basic
+basic.png
+complex
+complex.png
+minecraft_images
+comparisons.jsonl
+nouns_cache.db
+nouns.json
+*.scad
diff --git a/README.md b/README.md
index 495c979..c35853a 100644
--- a/README.md
+++ b/README.md
@@ -63,6 +63,6 @@ This comes with absolutely no guarantee of support or correct function, although
 * `bmp280_prometheus.py` - read BMP280 temperature/pressure sensors and export as Prometheus metrics.
 * `captive_portal.py` - automatically fill in captive portal forms (WIP).
 * `scd4x_prometheus.py` - read SCD4x temperature/humidity/CO2 sensors and export as Prometheus metrics.
-* `weight_painter.py` - paint arbitrary images into neural network weight matrices. Uses a permutation, so the distribution is preserved so training dynamics remain unaffected (so long as the network doesn't care about organization below the weight matrix level - this is not safe for attention heads etc).
+* `weight_painter.py` - paint arbitrary images into neural network weight matrices. Uses a permutation, so the distribution is preserved so training dynamics should not be affected much.
 * `cool-effect.glsl` - a nice effect I made by accident whilst trying to make a cooler one.
 * `portable_monitor_wallmount.py` - very simple CADQuery script which generates a frame for my portable monitor's top/bottom bezels so it can be stuck to the wall and slid out easily.
diff --git a/aidans_bad_code.py b/aidans_bad_code.py
index bd84774..80b1619 100644
--- a/aidans_bad_code.py
+++ b/aidans_bad_code.py
@@ -1,7 +1,7 @@
 class Primes:
     def __init__(self, max):
         self.internal = range(2,max+1)
-    
+
     def __next__(self):
         i = self.internal.__iter__().__next__()
         self.internal = filter(lambda n : n % i != 0, self.internal)
@@ -10,4 +10,4 @@ class Primes:
     def __iter__(self): return self
 
 for i in Primes(100):
-    print(i)
\ No newline at end of file
+    print(i)
diff --git a/autocrafter.py b/autocrafter.py
new file mode 100644
index 0000000..6171ed6
--- /dev/null
+++ b/autocrafter.py
@@ -0,0 +1,260 @@
+from dataclasses import dataclass
+from collections import Counter, defaultdict, deque
+import math
+from typing import Generator
+import scipy.optimize as opt
+import numpy as np
+import graphviz
+
+@dataclass
+class Recipe:
+    slots: list[str]
+    quantity: int
+    processing: bool
+
+short_names = {
+    "minecraft:stone": "st",
+    "minecraft:redstone": "re",
+    "minecraft:glass": "gl",
+    "minecraft:glass_pane": "gp",
+    "minecraft:gold_ingot": "gi",
+    "minecraft:iron_ingot": "ii",
+    "minecraft:oak_wood": "ow",
+    "minecraft:oak_planks": "op",
+    "minecraft:oak_chest": "oc",
+    "computercraft:computer": "cc",
+    "computercraft:computer_advanced": "ca",
+    "computercraft:turtle": "tu",
+    "minecraft:birch_wood": "bw",
+    "minecraft:birch_planks": "bp",
+    "quark:birch_chest": "bc",
+    "computercraft:turtle_advanced": "ta",
+    "minecraft:gold_block": "gb",
+    "minecraft:coal": "co",
+    "minecraft:charcoal": "ch",
+    "minecraft:gold_ore": "go",
+    "minecraft:iron_ore": "io",
+    "minecraft:sand": "sa",
+    None: "-"
+}
+
+short_names_inv = {v: k for k, v in short_names.items()}
+
+recipes = {}
+
+def recipe_short(output, qty, inputs, processing=False):
+    recipes[short_names_inv[output]] = Recipe([short_names_inv.get(slot, slot) for slot in inputs.split()], qty, processing)
+
+recipe_short("gp", 16, "gl gl gl gl gl gl")
+recipe_short("op", 4, "ow")
+recipe_short("oc", 1, "op op op op - op op op op")
+recipe_short("cc", 1, "st st st st re st st gp st")
+recipe_short("tu", 1, "ii ii ii ii cc ii ii oc ii")
+recipe_short("ca", 1, "gi gi gi gi re gi gi gp gi")
+recipe_short("ta", 1, "gi gi gi gi ca gi gi oc gi")
+
+@dataclass
+class Inventory:
+    contents: dict[str, int]
+
+    def __getitem__(self, item):
+        return self.contents.get(item, 0)
+
+    def add(self, item, quantity):
+        new_inventory = self.contents.copy()
+        new_inventory[item] = self.contents.get(item, 0) + quantity
+        return Inventory(new_inventory)
+
+    def take(self, item, quantity):
+        return self.add(item, -quantity)
+
+class NoRecipe(BaseException):
+    pass
+
+def solve(item: str, quantity: int, inventory: Inventory, use_callback, craft_callback) -> Inventory:
+    directly_available = min(inventory[item], quantity) # Consume items from storage if available
+    if directly_available > 0:
+        use_callback(item, directly_available)
+    inventory = inventory.take(item, directly_available)
+    quantity -= directly_available
+
+    if quantity > 0:
+        if recipe := recipes.get(item):
+            recipe_runs = math.ceil(quantity / recipe.quantity)
+            for citem, cquantity in Counter(recipe.slots).items():
+                if citem is not None:
+                    inventory = solve(citem, recipe_runs * cquantity, inventory, use_callback, craft_callback) # Recurse into subrecipe
+            craft_callback(recipe, item, recipe_runs)
+            inventory = inventory.add(item, recipe_runs * recipe.quantity - quantity) # Add spare items to tracked inventory
+        else:
+            raise NoRecipe(item, quantity) # We need to make this and can't
+
+    return inventory
+
+final = solve("computercraft:turtle", 1, Inventory({
+    "minecraft:stone": 100,
+    "minecraft:redstone": 1,
+    "minecraft:iron_ingot": 10,
+    "minecraft:oak_wood": 2,
+    "minecraft:glass": 7
+}), lambda item, quantity: print(f"Using {quantity} {item}"), lambda recipe, item, runs: print(f"Crafting {runs}x{recipe.quantity} {item}"))
+
+print(final)
+
+def compute_item_graph(recipes_general):
+    recipes_forward_graph = defaultdict(set) # edge u→v exists where u is used to craft v
+    recipes_backward_graph = defaultdict(set) # edge u→v exists where v's recipe contains u
+    for src, recipes in recipes_general.items():
+        for recipe in recipes:
+            for input in Counter(recipe.slots).keys():
+                if input is not None:
+                    recipes_forward_graph[input].add(src)
+                    recipes_backward_graph[src].add(input)
+
+    return recipes_forward_graph, recipes_backward_graph
+
+def item_graph(recipe_forward_graph, name):
+    dot = graphviz.Digraph("items", format="png", body=["\tpad=0.5\n"])
+    dot.attr("graph", nodesep="1", ranksep="1")
+    nodes = set()
+
+    def mk_node(item):
+        if not item in nodes:
+            dot.node(item.replace(":", "_"), "", image=f"minecraft_images/{item}.png", imagescale="true", shape="plaintext")
+            nodes.add(item)
+
+    for input, outputs in recipe_forward_graph.items():
+        mk_node(input)
+        for output in outputs:
+            dot.edge(input.replace(":", "_"), output.replace(":", "_"))
+            mk_node(output)
+
+    dot.render(filename=name)
+
+recipes_general = defaultdict(list)
+
+for src, recipe in recipes.items():
+    recipes_general[src].append(recipe)
+
+item_graph(compute_item_graph(recipes_general)[0], "basic")
+
+# Add multiple recipes for things to make the ILP solver work harder.
+
+def recipe_short_extra(output, qty, inputs, processing=False):
+    recipes_general[short_names_inv[output]].append(Recipe([short_names_inv.get(slot, slot) for slot in inputs.split()], qty, processing))
+
+recipe_short_extra("bp", 4, "bw")
+recipe_short_extra("bc", 1, "bp bp bp bp - bp bp bp bp")
+recipe_short_extra("tu", 1, "ii ii ii ii cc ii ii bc ii")
+recipe_short_extra("gb", 1, "gi gi gi gi gi gi gi gi gi")
+recipe_short("ta", 1, "gi gi gi gi ca gi gi bc gi")
+recipe_short_extra("ta", 1, "gi gb gi gi tu gi - gi -")
+recipe_short_extra("ta", 1, "gi gb gi gi tu gi - gi -")
+for count in [1, 8]:
+    recipe_short_extra("gl", count, "ch" + " sa" * count, processing=True)
+    recipe_short_extra("gl", count, "co" + " sa" * count, processing=True)
+    recipe_short_extra("ii", count, "ch" + " io" * count, processing=True)
+    recipe_short_extra("ii", count, "co" + " io" * count, processing=True)
+    recipe_short_extra("gi", count, "ch" + " go" * count, processing=True)
+    recipe_short_extra("gi", count, "co" + " go" * count, processing=True)
+    recipe_short_extra("ch", count, "co" + " ow" * count, processing=True)
+    recipe_short_extra("ch", count, "co" + " bw" * count, processing=True)
+
+recipes_forward_graph, recipes_backward_graph = compute_item_graph(recipes_general)
+
+item_graph(recipes_forward_graph, "complex")
+
+def topo_sort_inputs(item: str) -> Generator[str]:
+    seen = set()
+
+    # DFS to find root nodes in relevant segment (no incoming edges → no recipes)
+    def dfs(item):
+        if item in seen or not item: return
+        seen.add(item)
+
+        for input in recipes_backward_graph[item]:
+            dfs(input)
+
+    dfs(item)
+    roots = deque(item for item in seen if len(recipes_general[item]) == 0)
+
+    # Kahn's algorithm (approximately)
+    # Count incoming edges
+    counts = { item: len(inputs) for item, inputs in recipes_backward_graph.items() if item in seen }
+
+    while roots:
+        item = roots.popleft()
+        yield item
+        for out_edge in recipes_forward_graph[item]:
+            # Filter out items not in current operation's subtree
+            if (count := counts.get(out_edge)) != None:
+                counts[out_edge] -= 1
+                # It's now safe to use this item since its dependencies are all in output
+                if counts[out_edge] == 0:
+                    roots.append(out_edge)
+
+def solve_ilp(item: str, quantity: int, inventory: Inventory, use_callback, craft_callback):
+    sequence = list(topo_sort_inputs(item))
+
+    recipe_steps = []
+
+    # Rewrite (involved) recipes as production/consumption numbers.
+    items = { sitem: [] for sitem in sequence }
+
+    for item in sequence:
+        for recipe in recipes_general[item]:
+            step_changes = { sitem: 0 for sitem in sequence }
+            for citem, cquantity in Counter(recipe.slots).items():
+                if citem is not None:
+                    step_changes[citem] = -cquantity
+            step_changes[item] = recipe.quantity
+
+            recipe_steps.append((item, recipe))
+
+            for sitem, coef in step_changes.items():
+                items[sitem].append(coef)
+
+    objective = np.ones(len(recipe_steps))
+    # The amount of each item we produce/consume is linearly dependent on how many times each recipe is executed.
+    # This matrix is that linear transform.
+    # Solver wants upper bounds so flip signs.
+    production_matrix = -np.stack([np.array(coefs) for item, coefs in items.items()])
+    # production_matrix @ x is the vector of item consumption, so we upper-bound that with inventory item counts
+    # and require that we produce the required output (negative net consumption)
+    item_constraint_vector = np.array([ -quantity + inventory[i] if i == item else inventory[i] for i in sequence ])
+
+    soln = opt.linprog(objective, integrality=np.ones_like(objective), A_ub=production_matrix, b_ub=item_constraint_vector)
+
+    match soln.status:
+        case 0:
+            print("OK")
+            # soln.x is now the number of times to execute each recipe_step
+            item_consumption = production_matrix @ soln.x
+            for item_name, consumption in zip(sequence, item_consumption):
+                consumption = int(consumption)
+                if consumption > 0:
+                    use_callback(item_name, consumption)
+                inventory = inventory.take(item_name, consumption)
+            for (recipe_output, recipe_spec), execution_count in zip(recipe_steps, soln.x):
+                execution_count = int(execution_count)
+                if execution_count > 0:
+                    craft_callback(recipe_spec, recipe_output, execution_count)
+            return inventory
+        case 1:
+            print("iteration limit reached")
+            raise NoRecipe
+        case 2:
+            print("infeasible")
+            raise NoRecipe
+
+print(solve_ilp("computercraft:turtle_advanced", 1, Inventory({
+    "minecraft:stone": 100,
+    "minecraft:redstone": 1,
+    "minecraft:iron_ingot": 10,
+    "minecraft:gold_ore": 16,
+    "minecraft:oak_wood": 3,
+    "minecraft:birch_wood": 8,
+    "minecraft:glass": 7,
+    "minecraft:coal": 1,
+    "minecraft:sand": 16,
+}), lambda item, quantity: print(f"Using {quantity} {item}"), lambda recipe, item, runs: print(f"Crafting {runs}x{recipe.quantity} {item}")))
diff --git a/bigram.py b/bigram.py
new file mode 100644
index 0000000..baf79e7
--- /dev/null
+++ b/bigram.py
@@ -0,0 +1,25 @@
+from PIL import Image
+import sys
+from collections import defaultdict
+import math
+
+out = Image.new("RGB", (256, 256))
+
+ctr = defaultdict(lambda: 0)
+
+BS = 2<<18
+
+with open(sys.argv[2], "rb") as f:
+    last = b""
+    while xs := f.read(BS):
+        for a, b in zip(last + xs, last + xs[1:]):
+            ctr[a, b] += 1
+        last = bytes([xs[-1]])
+
+ctrl = { k: math.log(v) for k, v in ctr.items() }
+maxv = max(ctrl.values())
+for x, y in ctrl.items():
+    s = int(y / maxv * 255)
+    out.putpixel((x[0], x[1]), (0, s, 0))
+
+out.save(sys.argv[1])
diff --git a/captive_portal.py b/captive_portal.py
index c72747e..0985e1f 100644
--- a/captive_portal.py
+++ b/captive_portal.py
@@ -42,7 +42,7 @@ session = requests.Session()
 
 DETECTPORTAL_URL = "http://detectportal.firefox.com/canonical.html"
 DETECTPORTAL_CONTENT = '<meta http-equiv="refresh" content="0;url=https://support.mozilla.org/kb/captive-portal"/>'
-PRIORITY_KEYWORDS = {"registr", "login", "signup", "signin"}
+PRIORITY_KEYWORDS = {"regist", "login", "signup", "signin"}
 CONFIRM_SUFFIXES = {"2", "repeat", "confirm", "_repeat", "_confirm"}
 EMAIL_BASE = "0t.lt"
 
@@ -85,11 +85,20 @@ def handle_response(response):
     queue_ext = []
     for link in soup.find_all("a"):
         if href := link.get("href"):
-            href = urllib.parse.urljoin(response.url, href)
             if is_priority(href):
                 queue_ext.insert(0, href)
             else:
                 queue_ext.append(href)
+    """
+    for script in soup.find_all("script"):
+        if src := script.get("src"):
+            queue_ext.append(src)
+    """
+    for meta in soup.find_all("meta"):
+        if meta.get("http-equiv", "").lower() == "refresh":
+            if content := meta.get("content"):
+                if mat := re.match(r"\d+;URL='(.*)'", content):
+                    queue_ext.append(mat.group(1))
 
     for form in soup.find_all("form"):
         fields = {}
@@ -152,6 +161,7 @@ def handle_response(response):
             response = session.post(action, data=fields)
         handle_response(response)
 
+    queue_ext = [ urllib.parse.urljoin(response.url, q) for q in queue_ext ]
     queue.extend(x for x in queue_ext if x not in tried)
 
 while True:
diff --git a/compare_things.py b/compare_things.py
new file mode 100644
index 0000000..2e5942a
--- /dev/null
+++ b/compare_things.py
@@ -0,0 +1,23 @@
+import json
+import random
+
+with open("nouns.json", "r") as f:
+    nouns = set(json.load(f))
+
+with open("comparisons.jsonl", "a") as f:
+    def writeline(obj):
+        f.write(json.dumps(obj, separators=(",", ":")) + "\n")
+
+    for noun in nouns:
+        other_noun = random.choice(list(nouns - {noun}))
+        print(noun, "/",other_noun)
+        pref = input("a/b/e/x/y: ")
+        writeline({"a": noun, "b": other_noun, "pref": pref})
+        if pref == "x":
+            writeline({"a": noun, "b": other_noun, "pref": "x"})
+            nouns.remove(noun)
+        elif pref == "y":
+            writeline({"a": other_noun, "b": noun, "pref": "y"})
+            nouns.remove(other_noun)
+
+        f.flush()
diff --git a/extract_nouns.py b/extract_nouns.py
new file mode 100644
index 0000000..5d4734f
--- /dev/null
+++ b/extract_nouns.py
@@ -0,0 +1,53 @@
+import openai
+import json
+import os
+import shelve
+import re
+import random
+
+openai.api_key = os.environ["OPENAI_API_KEY"]
+
+client = openai.OpenAI(api_key=os.environ["OPENAI_API_KEY"])
+
+def chunks(text, size):
+    out = [""]
+    for line in text.split("\n"):
+        out[-1] += line + "\n"
+        if len(out[-1]) > size:
+            out.append("")
+    return [ x.removesuffix("\n") for x in out if x ]
+
+def extract_nouns(text):
+    completion = client.chat.completions.create(
+        model="gpt-4o-mini",
+        messages=[
+            {"role": "user", "content": f"""Extract all unique simple noun phrases from this document and put them in a JSON array in the singular:
+```
+{text}
+```"""}],
+        response_format={"type": "json_object"},
+        max_tokens=16384,
+        temperature=0.2 # should be 0 but repetition issues at 0
+    )
+    result = json.loads(completion.choices[0].message.content)
+    return result[next(iter(result.keys()))]
+
+with open("../website/strings.json", "r") as f:
+    strings = json.load(f)
+
+nouns = set()
+with shelve.open("nouns_cache.db") as db:
+    for bigstring in strings:
+        for string in chunks(bigstring, 8192):
+            if nouns: print(random.choices(list(nouns), k=10))
+            if string in db:
+                nouns.update(db[string])
+            else:
+                print("reading:", string[:100])
+                s_nouns = extract_nouns(string)
+                nouns.update(s_nouns)
+                print(len(s_nouns), "/", len(nouns))
+                db[string] = s_nouns
+
+with open("nouns.json", "w") as f:
+    json.dump(list(nouns), f)
diff --git a/memeticize.py b/memeticize.py
index ab82f5d..0c43af1 100644
--- a/memeticize.py
+++ b/memeticize.py
@@ -1,9 +1,9 @@
 import os, sys, subprocess, datetime
 
-dt_threshold = datetime.datetime(2023, 6, 16).timestamp()
+dt_threshold = datetime.datetime(2024, 10, 22).timestamp()
 
 _, indir, outdir = sys.argv
-for x in os.listdir(indir):
+for x in sorted(os.listdir(indir)):
     inpath = os.path.join(indir, x)
     if os.stat(inpath).st_mtime > dt_threshold:
         if subprocess.run(("feh", inpath)).returncode == 0:
diff --git a/parametric_mesh.py b/parametric_mesh.py
new file mode 100644
index 0000000..8c2b721
--- /dev/null
+++ b/parametric_mesh.py
@@ -0,0 +1,18 @@
+from solid2 import *
+import numpy as np
+
+THICKNESS = 3
+XYSIZE = 58
+HOLE_SIZE = 4
+LINE_SIZE = 0.5
+
+LINE_SPACING = HOLE_SIZE + LINE_SIZE
+XYSIZE = (XYSIZE // LINE_SPACING) * LINE_SPACING + LINE_SIZE
+print(XYSIZE)
+
+xlines = [ cube(LINE_SIZE, XYSIZE, THICKNESS).translate(x, 0, 0) for x in np.arange(0, XYSIZE, LINE_SPACING) ]
+ylines = [ cube(XYSIZE, LINE_SIZE, THICKNESS).translate(0, y, 0) for y in np.arange(0, XYSIZE, LINE_SPACING) ]
+
+model = union()(*xlines).union()(*ylines)
+
+model.save_as_scad()
diff --git a/smtp2rss.py b/smtp2rss.py
index f77c40b..40473cb 100644
--- a/smtp2rss.py
+++ b/smtp2rss.py
@@ -99,7 +99,10 @@ def clean_html(html):
         remove_unknown_tags=True,
         safe_attrs_only=True
     )
-    return cleaner.clean_html(feedparser.sanitizer._sanitize_html(html.replace("<!doctype html>", ""), "utf-8", "text/html"))
+    try:
+        return cleaner.clean_html(feedparser.sanitizer._sanitize_html(html.replace("<!doctype html>", ""), "utf-8", "text/html"))
+    except:
+        return "HTML parse error"
 
 def email_to_html(emsg, debug_info=False):
     if isinstance(emsg, Message):
diff --git a/wfc.html b/wfc.html
index d61a3d4..71e19b5 100644
--- a/wfc.html
+++ b/wfc.html
@@ -1,40 +1,140 @@
 <!DOCTYPE html>
-<canvas id="canv"></canvas>
-<input type="file" id="file">
-<button id="step">Step</button>
+<style>
+    canvas {
+        border: 1px solid black;
+    }
+
+    #colors .color {
+        display: inline-block;
+        width: 20px;
+        height: 20px;
+        margin: 5px;
+        border: 1px solid black;
+    }
+</style>
+<canvas id="output"></canvas>
+<canvas id="pattern"></canvas>
+<div id="controls">
+    <button id="step">Step</button>
+    <button id="run">Run</button>
+    <button id="reset">Reset</button>
+    <input type="checkbox" id="hard-borders" checked><label for="hard-borders">Hard borders</label>
+    <input type="checkbox" id="ignore-directions" checked><label for="ignore-directions">Ignore directions</label>
+    <input type="checkbox" id="diagonals" checked><label for="diagonals">Diagonals</label>
+</div>
+<div id="colors"></div>
 <div id="out"></div>
 <script>
     const write = line => {
         const out = document.querySelector("#out")
+        out.innerHTML = ""
         out.appendChild(document.createTextNode(line))
         out.appendChild(document.createElement("br"))
     }
 
-    const PX = 16
+    const PATTERN_W = 6
     const W = 16
-    const RANGE = 10
-    const ctx = document.querySelector("canvas").getContext("2d")
-    ctx.canvas.width = PX * W
-    ctx.canvas.height = PX * W
+    const PX = 24
+    const PATTERN_PX = 64
 
-    let grid = Array(W * W).fill(null).map(x => ({ value: null, options: new Set(Array(RANGE).fill(null).map((_, ix) => ix)) }))
     const map = ([x, y]) => x + y * W
     const unmap = a => [a % W, Math.floor(a / W)]
     const vsum = ([a, b], [c, d]) => [a + c, b + d]
-    const adj = [[0, 1], [0, -1], [1, 0], [-1, 0]]
-    const inRange = p => p >= 0 && p < grid.length
+    const inRange = ([x, y]) => x >= 0 && x < W && y >= 0 && y < W
     const modclamp = x => x < 0 ? 10 + x : x % 10
 
+    let currentConstraintSet = {}
+    let colorsInUse = new Set()
+
+    let ignoreDirections = false
+    const readIgnoreDirections = () => ignoreDirections = document.querySelector("#ignore-directions").checked
+    readIgnoreDirections()
+    document.querySelector("#ignore-directions").addEventListener("change", readIgnoreDirections)
+    let hardBorders = false
+    const readHardBorders = () => hardBorders = document.querySelector("#hard-borders").checked
+    readHardBorders()
+    document.querySelector("#hard-borders").addEventListener("change", readHardBorders)
+
+    const getAdjacent = diagonals => diagonals ? [[0, 1], [0, -1], [1, 0], [-1, 0], [1, 1], [1, -1], [-1, 1], [-1, -1]] : [[0, 1], [0, -1], [1, 0], [-1, 0]]
+
+    let adj = null
+
+    const ctx = document.querySelector("canvas#output").getContext("2d")
+    ctx.canvas.width = PX * W
+    ctx.canvas.height = PX * W
+
+    let grid = Array(W * W).fill(null).map(x => ({ value: null, options: new Set() }))
+
+    const joinConstraintKey = adjs => {
+        if (ignoreDirections) adjs.sort()
+        return adjs.join(",")
+    }
+
+    const regenerateOptionsAt = (coord) => {
+        const data = grid[map(coord)]
+        const slots = []
+        for (const a of adj) {
+            const n = vsum(a, coord)
+            if (inRange(n)) {
+                const value = grid[map(n)].value
+                slots.push(value === null ? undefined : value)
+            } else {
+                slots.push(null)
+            }
+        }
+        if (slots.every(x => x === undefined)) {
+            data.options = colorsInUse // no constraints apply - shortcut
+            return
+        }
+        const out = new Set()
+        let hasMatch = false
+        // N-way Cartesian product of slots
+        const go = (slots, acc) => {
+            if (slots.length === 0) {
+                for (const prod of acc) {
+                    const ckey = joinConstraintKey(prod)
+                    if (currentConstraintSet[ckey]) {
+                        for (const val of currentConstraintSet[ckey]) {
+                            out.add(val)
+                        }
+                        hasMatch = true
+                    }
+                }
+            } else {
+                const [fst, ...rest] = slots
+                if (fst === undefined) {
+                    return go(rest, Array.from(colorsInUse).concat(hardBorders ? [] : [null]).flatMap(x => acc.map(xs => [x].concat(xs))))
+                } else {
+                    return go(rest, acc.map(xs => [fst].concat(xs)))
+                }
+            }
+        }
+        go(slots, [[]])
+        data.options = out
+    }
+
+    const regenerateOptions = () => {
+        for (let x = 0; x < W; x++) {
+            for (let y = 0; y < W; y++) {
+                regenerateOptionsAt([x, y])
+            }
+        }
+    }
+
+    const readAdjacent = () => {
+        adj = getAdjacent(document.querySelector("#diagonals").checked)
+        regenerateOptions()
+    }
+    readAdjacent()
+    document.querySelector("#diagonals").addEventListener("change", readAdjacent)
+
     const updatePos = (pos, value) => {
         grid[map(pos)].value = value
-        console.log(value)
         grid[map(pos)].options = null
         for (const a of adj) {
-            const n = map(vsum(a, pos))
-            if (inRange(n) && grid[n].value === null) {
-                for (const offset of [-1, 0, 1, 2, -2, 3, -3]) {
-                    grid[n].options.delete(modclamp(offset + value))
-                }
+            const n = vsum(a, pos)
+            if (inRange(n) && grid[map(n)].value === null && grid[map(n)].options !== null) {
+                regenerateOptionsAt(n)
             }
         }
     }
@@ -49,56 +149,181 @@
             bestPos.push(unmap(index))
         }
         return [bestQty, bestPos]
-    }, [RANGE, []])
+    }, [colorsInUse.size + 1, []])
+
     const render = grid => {
         for (let x = 0; x < W; x++) {
             for (let y = 0; y < W; y++) {
                 const data = grid[map([x, y])]
-                const level = data.options && Math.floor(data.options.size / RANGE * 255).toString(16).padStart(2, "0")
-                ctx.fillStyle = data.value !== null ? `#0000${Math.floor(data.value / RANGE * 255).toString(16).padStart(2, "0")}` : `#${level}${level}${level}`
+                const level = data.options && Math.floor((data.options.size + 1) / (colorsInUse.size + 1) * 255).toString(16).padStart(2, "0") || "00"
+                ctx.fillStyle = data.value !== null ? data.value : `#${level}${level}${level}`
                 ctx.fillRect(x * PX, y * PX, PX, PX)
+                if (data.value === null) {
+                    ctx.strokeStyle = "#000000"
+                    ctx.beginPath()
+                    ctx.moveTo(x * PX, y * PX)
+                    ctx.lineTo((x + 1) * PX, (y + 1) * PX)
+                    ctx.closePath()
+                    ctx.stroke()
+                    ctx.strokeStyle = null
+                }
             }
         }
     }
 
+    let recentColors = ["#ffffff", "#000000", "#ff0000", "#00ff00", "#0000ff", "#ffff00", "#00ffff", "#ff00ff"]
+    const recentColorsDiv = document.querySelector("#colors")
+    let currentColor = recentColors[0]
+
+    const pushColor = color => {
+        recentColors = [color].concat(recentColors.filter(x => x !== color))
+        if (recentColors.length > 10) {
+            recentColors.shift()
+        }
+        currentColor = color
+        updateRecentColors()
+    }
+
+    const updateRecentColors = () => {
+        recentColorsDiv.innerHTML = ""
+        for (const color of recentColors) {
+            recentColorsDiv.appendChild(document.createElement("div"))
+            recentColorsDiv.lastChild.classList.add("color")
+            recentColorsDiv.lastChild.style.backgroundColor = color
+            recentColorsDiv.lastChild.addEventListener("click", () => {
+                pushColor(color)
+            })
+        }
+    }
+
+    const handleCanvasMouse = ev => {
+        if ((ev.buttons & 1) !== 0) {
+            return
+        }
+        const [x, y] = [Math.floor(ev.offsetX / PX), Math.floor(ev.offsetY / PX)]
+        if (x < 0 || x >= W || y < 0 || y >= W) {
+            return
+        }
+        const coord = [x, y]
+        const data = grid[map(coord)]
+        if (data.value === null) {
+            pushColor(currentColor)
+            updatePos(coord, currentColor)
+        }
+    }
+    ctx.canvas.addEventListener("click", handleCanvasMouse)
+    ctx.canvas.addEventListener("mousemove", handleCanvasMouse)
+
     const pick = arr => arr[Math.floor(Math.random() * arr.length)]
 
     render(grid)
 
     step.onclick = () => {
         const [qty, pos] = findBestCandidates(grid)
-        if (qty === 0) {
-            write("contradiction")
+        if (pos.length === 0) {
+            write("Done.")
             return
         }
-        write(`${qty} options on ${pos.length} tiles`)
+        if (qty === 0) {
+            write("Contradiction.")
+            return
+        }
+        write(`${qty} options on ${pos.length} tiles.`)
         if (qty === 1) {
-            write("resolving")
+            write(`Resolving ${pos.length} tiles.`)
             for (const p of pos) {
                 const newValue = Array.from(grid[map(p)].options)[0]
-                console.log(newValue)
                 updatePos(p, newValue)
             }
         } else {
             const p = pick(pos)
-            console.log(p, map(p), grid[map(p)])
             const newValue = pick(Array.from(grid[map(p)].options))
-            console.log(newValue)
             updatePos(p, newValue)
         }
         render(grid)
     }
 
-    window.file.oninput = ev => {
-        const file = e.target.files[0]
-        const url = URL.createObjectURL(file)
-        const img = new Image()
-        
-        img.onload = function() {
-            URL.revokeObjectURL(img.src)
-            c.getContext("2d").drawImage(img, 0, 0)
+    let timer
+    const runButton = document.querySelector("#run")
+    runButton.addEventListener("click", () => {
+        if (runButton.innerHTML === "Run") {
+            runButton.innerHTML = "Stop"
+            timer = setInterval(step.onclick, 100)
+        } else {
+            runButton.innerHTML = "Run"
+            clearInterval(timer)
+        }
+    })
+
+    const reset = () => {
+        grid = Array(W * W).fill(null).map(x => ({ value: null, options: new Set() }))
+        clearInterval(timer)
+        runButton.innerHTML = "Run"
+        render(grid)
+        regenerateOptions()
+    }
+    document.querySelector("#reset").addEventListener("click", reset)
+
+    const patternEditor = () => {
+        const map = ([x, y]) => x + y * PATTERN_W
+        const pattern = document.querySelector("canvas#pattern")
+        const ctx = pattern.getContext("2d")
+
+        let grid = Array(PATTERN_W * PATTERN_W).fill(null).map(x => ({ value: currentColor }))
+        const inRange = ([x, y]) => x >= 0 && x < PATTERN_W && y >= 0 && y < PATTERN_W
+
+        pattern.width = PATTERN_PX * PATTERN_W
+        pattern.height = PATTERN_PX * PATTERN_W
+
+        const constraintKeyFor = coord => {
+            let constraintKey = []
+            for (const a of adj) {
+                const n = vsum(a, coord)
+                if (inRange(n)) {
+                    constraintKey.push(grid[map(n)].value)
+                } else {
+                    constraintKey.push(null)
+                }
+            }
+            return joinConstraintKey(constraintKey)
         }
 
-        img.src = url 
+        const recomputeConstraintSet = () => {
+            currentConstraintSet = new Set()
+            colorsInUse = new Set()
+            for (let x = 0; x < PATTERN_W; x++) {
+                for (let y = 0; y < PATTERN_W; y++) {
+                    const coord = [x, y]
+                    const data = grid[map(coord)]
+                    const constraintKey = constraintKeyFor(coord)
+                    currentConstraintSet[constraintKey] ??= new Set()
+                    currentConstraintSet[constraintKey].add(data.value)
+                    colorsInUse.add(data.value)
+                }
+            }
+
+            regenerateOptions()
+        }
+
+        const handlePatternMouse = ev => {
+            if ((ev.buttons & 1) !== 0) {
+                return
+            }
+            const [x, y] = [Math.floor(ev.offsetX / PATTERN_PX), Math.floor(ev.offsetY / PATTERN_PX)]
+            if (x < 0 || x >= PATTERN_W || y < 0 || y >= PATTERN_W) {
+                return
+            }
+            ctx.fillStyle = currentColor
+            ctx.fillRect(PATTERN_PX * x, PATTERN_PX * y, PATTERN_PX, PATTERN_PX)
+            grid[map([x, y])].value = currentColor
+            recomputeConstraintSet()
+        }
+        pattern.addEventListener("click", handlePatternMouse)
+        pattern.addEventListener("mousemove", handlePatternMouse)
+
+        recomputeConstraintSet()
     }
-</script>
\ No newline at end of file
+
+    updateRecentColors()
+    patternEditor()
+</script>