foo.diff

diff --git a/Cargo.lock b/Cargo.lock
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--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,4 @@
+[root]
+name = "fifteen_puzzle"
+version = "0.1.0"
+
diff --git a/Cargo.toml b/Cargo.toml
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index 0000000..7320974
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,4 @@
+[package]
+name = "fifteen_puzzle"
+version = "0.1.0"
+authors = ["michael <mpgarate@gmail.com>"]
diff --git a/src/game/.bitboard.rs.swp b/src/game/.bitboard.rs.swp
new file mode 100644
index 0000000..06d61aa
Binary files /dev/null and b/src/game/.bitboard.rs.swp differ
diff --git a/src/game/bitboard.rs b/src/game/bitboard.rs
new file mode 100644
index 0000000..08ac932
--- /dev/null
+++ b/src/game/bitboard.rs
@@ -0,0 +1,35 @@
+#[allow(dead_code)]
+const BOARD_STATE_EMPTY: u64 = 0x123456789ABCDEF0;
+
+#[allow(dead_code)]
+pub struct BitBoard {
+  data: u64,
+}
+
+#[allow(dead_code)]
+impl BitBoard {
+  fn new() -> BitBoard {
+    BitBoard { data: BOARD_STATE_EMPTY }
+  }
+
+  fn is_solved(&self) -> bool {
+    self.data == BOARD_STATE_EMPTY
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+
+  #[test]
+  fn constructs_with_empty_state() {
+    let b: BitBoard = BitBoard::new();
+    assert!(b.data == super::BOARD_STATE_EMPTY);
+  }
+
+  #[test]
+  fn new_board_is_solved() {
+    let b: BitBoard = BitBoard::new();
+    assert!(b.is_solved());
+  }
+}
diff --git a/src/game/mod.rs b/src/game/mod.rs
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index 0000000..7e255be
--- /dev/null
+++ b/src/game/mod.rs
@@ -0,0 +1,2 @@
+pub use self::bitboard::BitBoard;
+mod bitboard;
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..ce8dedf
--- /dev/null
+++ b/src/lib.rs
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+mod game;
+