diff --git a/Cargo.lock b/Cargo.lock
index 435ff17..f7bf1a5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5,3 +5,21 @@ version = 4
 [[package]]
 name = "canvas"
 version = "0.1.0"
+dependencies = [
+ "itertools",
+]
+
+[[package]]
+name = "either"
+version = "1.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"
+
+[[package]]
+name = "itertools"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b192c782037fadd9cfa75548310488aabdbf3d2da73885b31bd0abd03351285"
+dependencies = [
+ "either",
+]
diff --git a/canvas/Cargo.toml b/canvas/Cargo.toml
index c804456..8e4db03 100644
--- a/canvas/Cargo.toml
+++ b/canvas/Cargo.toml
@@ -4,3 +4,4 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
+itertools = "0.14.0"
diff --git a/canvas/src/objective.rs b/canvas/src/objective.rs
index f7b8f58..1226073 100644
--- a/canvas/src/objective.rs
+++ b/canvas/src/objective.rs
@@ -69,17 +69,17 @@ impl IntoIterator for IconSet {
 }
 
 impl Objective {
-    pub fn count_matches(&self, painting: &Painting) -> u8 {
+    pub fn count_matches_bitfield(&self, bitfield: &IconBitfield) -> u8 {
         match self {
             Objective::AllFields => {
-                if IconBitfield::from_painting(painting).all_fields() == 0b11111 {
+                if bitfield.all_fields() == 0b11111 {
                     1
                 } else {
                     0
                 }
             }
             Objective::IconsUsed(icons) => {
-                let bits = IconBitfield::from_painting(painting);
+                let bits = bitfield;
                 if icons.into_iter().all(|i| bits.get_icon_bits(i) > 0) {
                     1
                 } else {
@@ -87,7 +87,7 @@ impl Objective {
                 }
             }
             Objective::ExactlyNIcons((icons, count)) => {
-                let bits = IconBitfield::from_painting(painting);
+                let bits = bitfield;
 
                 if icons
                     .into_iter()
@@ -101,7 +101,7 @@ impl Objective {
                 }
             }
             Objective::NInARow(icon, count) => {
-                let mut bits = IconBitfield::from_painting(painting).get_icon_bits(*icon);
+                let mut bits = bitfield.get_icon_bits(*icon);
                 let bitmask = (1 << count) - 1;
                 let mut res_count = 0;
                 while bits > 0 {
@@ -119,6 +119,10 @@ impl Objective {
             _ => todo!(),
         }
     }
+
+    pub fn count_matches(&self, painting: &Painting) -> u8 {
+        self.count_matches_bitfield(&IconBitfield::from_painting(painting))
+    }
 }
 
 #[cfg(test)]
diff --git a/canvas/src/optimizer.rs b/canvas/src/optimizer.rs
index bd28ec7..35d61e7 100644
--- a/canvas/src/optimizer.rs
+++ b/canvas/src/optimizer.rs
@@ -1,5 +1,14 @@
-// use crate::{CriteriaCard, icon_bitfield::IconBitfield};
+use itertools::Itertools;
 
-// fn draw_painting(cards: &[IconBitfield], obj: Vec<(&CriteriaCard, u8)>) -> [usize; 3] {
-//     todo!()
-// }
+use crate::{CriteriaCard, icon_bitfield::IconBitfield};
+
+fn draw_painting(cards: &[IconBitfield], _obj: Vec<(&CriteriaCard, u8)>) -> [usize; 3] {
+    for stack in cards.iter().permutations(3) {
+        let stack: [&IconBitfield; 3] = stack.try_into().unwrap();
+        let mut painting = stack[0].clone();
+        painting.layer_below(stack[1]).layer_below(stack[2]);
+        // obj.iter()
+        //     .map(|x| x.0.objective.count_matches_bitfield(&painting));
+    }
+    todo!()
+}