diff --git a/Makefile b/Makefile
index ef03c40..7706641 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,10 @@
 
+all: test bin
+
+test: kifu-core/test-oneshot sgf/test-oneshot
+
+bin: kifu-gtk 
+
 changeset-dev:
 	cd changeset && make dev
 
@@ -58,3 +64,9 @@ kifu-pwa/dev:
 
 kifu-pwa/server:
 	pushd kifu/pwa && make server
+
+sgf/test:
+	pushd sgf && make test
+
+sgf/test-oneshot:
+	pushd sgf && make test-oneshot
diff --git a/go-sgf/src/lib.rs b/go-sgf/src/lib.rs
deleted file mode 100644
index db6f9a3..0000000
--- a/go-sgf/src/lib.rs
+++ /dev/null
@@ -1,47 +0,0 @@
-mod date;
-pub use date::Date;
-
-mod go;
-pub use go::{parse_sgf, GameTree, GameType, Rank};
-
-mod tree;
-
-use thiserror::Error;
-
-pub enum Warning {}
-
-#[derive(Debug, PartialEq, Error)]
-pub enum ParseError {
-    #[error("An unknown error was found")]
-    NomError(nom::error::Error<String>),
-}
-
-impl From<nom::error::Error<&str>> for ParseError {
-    fn from(err: nom::error::Error<&str>) -> Self {
-        Self::NomError(nom::error::Error {
-            input: err.input.to_owned(),
-            code: err.code.clone(),
-        })
-    }
-}
-
-/*
-impl From<(&str, VerboseErrorKind)> for
-
-impl From<nom::error::VerboseError<&str>> for ParseError {
-    fn from(err: nom::error::VerboseError<&str>) -> Self {
-        Self::NomErrors(
-            err.errors
-                .into_iter()
-                .map(|err| ParseError::from(err))
-                .collect(),
-        )
-        /*
-        Self::NomError(nom::error::Error {
-            input: err.input.to_owned(),
-            code: err.code.clone(),
-        })
-        */
-    }
-}
-*/
diff --git a/kifu/core/Cargo.lock b/kifu/core/Cargo.lock
index 7ad8625..e15421d 100644
--- a/kifu/core/Cargo.lock
+++ b/kifu/core/Cargo.lock
@@ -120,17 +120,6 @@ dependencies = [
  "syn 2.0.12",
 ]
 
-[[package]]
-name = "go-sgf"
-version = "0.1.0"
-dependencies = [
- "chrono",
- "nom",
- "serde",
- "thiserror",
- "typeshare",
-]
-
 [[package]]
 name = "grid"
 version = "0.9.0"
@@ -191,10 +180,10 @@ version = "0.1.0"
 dependencies = [
  "chrono",
  "cool_asserts",
- "go-sgf",
  "grid",
  "serde",
  "serde_json",
+ "sgf",
  "thiserror",
  "typeshare",
 ]
@@ -337,6 +326,17 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "sgf"
+version = "0.1.0"
+dependencies = [
+ "chrono",
+ "nom",
+ "serde",
+ "thiserror",
+ "typeshare",
+]
+
 [[package]]
 name = "syn"
 version = "1.0.109"
diff --git a/kifu/core/Cargo.toml b/kifu/core/Cargo.toml
index 5972a7a..737ec89 100644
--- a/kifu/core/Cargo.toml
+++ b/kifu/core/Cargo.toml
@@ -7,7 +7,7 @@ edition = "2021"
 
 [dependencies]
 chrono          = { version = "0.4" }
-go-sgf          = { path = "../../go-sgf" }
+sgf             = { path = "../../sgf" }
 grid            = { version = "0.9" }
 serde_json      = { version = "1" }
 serde           = { version = "1", features = [ "derive" ] }
diff --git a/kifu/core/src/database.rs b/kifu/core/src/database.rs
index 6797e29..cad6a5c 100644
--- a/kifu/core/src/database.rs
+++ b/kifu/core/src/database.rs
@@ -1,6 +1,6 @@
 use std::{ffi::OsStr, io::Read, os::unix::ffi::OsStrExt, path::PathBuf};
 
-use go_sgf::{parse_sgf, GameTree};
+use sgf::{go, parse_sgf, Game};
 use thiserror::Error;
 
 #[derive(Error, Debug)]
@@ -20,12 +20,12 @@ impl From<std::io::Error> for Error {
 #[derive(Debug)]
 pub struct Database {
     path: PathBuf,
-    games: Vec<GameTree>,
+    games: Vec<go::Game>,
 }
 
 impl Database {
     pub fn open_path(path: PathBuf) -> Result<Database, Error> {
-        let mut games: Vec<GameTree> = Vec::new();
+        let mut games: Vec<go::Game> = Vec::new();
 
         let extension = PathBuf::from("sgf").into_os_string();
 
@@ -39,8 +39,12 @@ impl Database {
                             .unwrap()
                             .read_to_string(&mut buffer)
                             .unwrap();
-                        let sgf = parse_sgf(&buffer).unwrap();
-                        games.extend(sgf);
+                        for sgf in parse_sgf(&buffer).unwrap() {
+                            match sgf {
+                                Game::Go(game) => games.push(game),
+                                Game::Unsupported(_) => {}
+                            }
+                        }
                     }
                 }
                 Err(err) => println!("failed entry: {:?}", err),
@@ -54,7 +58,7 @@ impl Database {
         self.games.len()
     }
 
-    pub fn all_games(&self) -> impl Iterator<Item = &GameTree> {
+    pub fn all_games(&self) -> impl Iterator<Item = &go::Game> {
         self.games.iter()
     }
 }
@@ -63,7 +67,7 @@ impl Database {
 mod test {
     use super::*;
     use cool_asserts::assert_matches;
-    use go_sgf::{Date, GameType};
+    use sgf::Date;
 
     #[test]
     fn it_reads_empty_database() {
@@ -77,9 +81,7 @@ mod test {
         let db =
             Database::open_path(PathBuf::from("fixtures/five_games/")).expect("database to open");
         assert_eq!(db.all_games().count(), 5);
-        for game in db.all_games() {
-            assert_eq!(game.game_type, GameType::Go);
-        }
+        for game in db.all_games() {}
 
         assert_matches!(db.all_games().find(|g| g.info.black_player == Some("Steve".to_owned())),
         Some(game) => {
diff --git a/kifu/core/src/ui/elements/game_preview.rs b/kifu/core/src/ui/elements/game_preview.rs
index cd16694..1624fb9 100644
--- a/kifu/core/src/ui/elements/game_preview.rs
+++ b/kifu/core/src/ui/elements/game_preview.rs
@@ -1,5 +1,8 @@
-use go_sgf::{Date, GameTree, Rank};
 use serde::{Deserialize, Serialize};
+use sgf::{
+    go::{Game, Rank},
+    Date,
+};
 use typeshare::typeshare;
 
 #[derive(Clone, Debug, Deserialize, Serialize)]
@@ -13,7 +16,7 @@ pub struct GamePreviewElement {
 }
 
 impl GamePreviewElement {
-    pub fn new(game: &GameTree) -> GamePreviewElement {
+    pub fn new(game: &Game) -> GamePreviewElement {
         GamePreviewElement {
             date: game.info.date.clone(),
             black_player: game
diff --git a/kifu/core/src/ui/home.rs b/kifu/core/src/ui/home.rs
index 12cca5b..59a064b 100644
--- a/kifu/core/src/ui/home.rs
+++ b/kifu/core/src/ui/home.rs
@@ -1,6 +1,6 @@
 use crate::ui::{Action, GamePreviewElement};
-use go_sgf::GameTree;
 use serde::{Deserialize, Serialize};
+use sgf::go::Game;
 use typeshare::typeshare;
 
 fn rank_strings() -> Vec<String> {
@@ -56,7 +56,7 @@ pub struct HomeView {
     pub start_game: Action<()>,
 }
 
-pub fn home<'a>(games: impl Iterator<Item = &'a GameTree>) -> HomeView {
+pub fn home<'a>(games: impl Iterator<Item = &'a Game>) -> HomeView {
     let black_player = PlayerElement::Hotseat(HotseatPlayerElement {
         placeholder: Some("black player".to_owned()),
         default_rank: None,
diff --git a/kifu/gtk/Cargo.lock b/kifu/gtk/Cargo.lock
index 7225c74..53e612d 100644
--- a/kifu/gtk/Cargo.lock
+++ b/kifu/gtk/Cargo.lock
@@ -545,17 +545,6 @@ dependencies = [
  "system-deps",
 ]
 
-[[package]]
-name = "go-sgf"
-version = "0.1.0"
-dependencies = [
- "chrono",
- "nom",
- "serde",
- "thiserror",
- "typeshare",
-]
-
 [[package]]
 name = "gobject-sys"
 version = "0.17.4"
@@ -799,10 +788,10 @@ name = "kifu-core"
 version = "0.1.0"
 dependencies = [
  "chrono",
- "go-sgf",
  "grid",
  "serde",
  "serde_json",
+ "sgf",
  "thiserror",
  "typeshare",
 ]
@@ -1237,6 +1226,17 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "sgf"
+version = "0.1.0"
+dependencies = [
+ "chrono",
+ "nom",
+ "serde",
+ "thiserror",
+ "typeshare",
+]
+
 [[package]]
 name = "signal-hook-registry"
 version = "1.4.1"
diff --git a/go-sgf/Cargo.lock b/sgf/Cargo.lock
similarity index 99%
rename from go-sgf/Cargo.lock
rename to sgf/Cargo.lock
index bfdf38e..699220b 100644
--- a/go-sgf/Cargo.lock
+++ b/sgf/Cargo.lock
@@ -63,17 +63,6 @@ version = "0.8.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e496a50fda8aacccc86d7529e2c1e0892dbd0f898a6b5645b5561b89c3210efa"
 
-[[package]]
-name = "go-sgf"
-version = "0.1.0"
-dependencies = [
- "chrono",
- "nom",
- "serde",
- "thiserror",
- "typeshare",
-]
-
 [[package]]
 name = "iana-time-zone"
 version = "0.1.57"
@@ -216,6 +205,17 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "sgf"
+version = "0.1.0"
+dependencies = [
+ "chrono",
+ "nom",
+ "serde",
+ "thiserror",
+ "typeshare",
+]
+
 [[package]]
 name = "syn"
 version = "1.0.109"
diff --git a/go-sgf/Cargo.toml b/sgf/Cargo.toml
similarity index 95%
rename from go-sgf/Cargo.toml
rename to sgf/Cargo.toml
index cc24121..ab75ce2 100644
--- a/go-sgf/Cargo.toml
+++ b/sgf/Cargo.toml
@@ -1,5 +1,5 @@
 [package]
-name = "go-sgf"
+name = "sgf"
 version = "0.1.0"
 edition = "2021"
 
diff --git a/go-sgf/Makefile b/sgf/Makefile
similarity index 100%
rename from go-sgf/Makefile
rename to sgf/Makefile
diff --git a/go-sgf/src/date.rs b/sgf/src/date.rs
similarity index 100%
rename from go-sgf/src/date.rs
rename to sgf/src/date.rs
diff --git a/go-sgf/src/go.rs b/sgf/src/go.rs
similarity index 58%
rename from go-sgf/src/go.rs
rename to sgf/src/go.rs
index 79fab10..167b0c2 100644
--- a/go-sgf/src/go.rs
+++ b/sgf/src/go.rs
@@ -69,33 +69,103 @@
 //  VW
 
 use crate::{
-    date::{self, parse_date_field, Date},
-    tree::{parse_collection, ParseSizeError, Size},
+    date::{parse_date_field, Date},
+    tree::{Size, Tree},
+    Error,
 };
 use serde::{Deserialize, Serialize};
 use typeshare::typeshare;
 
-#[derive(Debug)]
-pub enum Error<'a> {
-    InvalidField,
-    InvalidBoardSize,
-    Incomplete,
-    InvalidSgf(nom::error::VerboseError<&'a str>),
+#[derive(Clone, Debug)]
+pub struct Game {
+    pub board_size: Size,
+    pub info: GameInfo,
+
+    pub tree: Tree,
 }
 
-impl<'a> From<nom::Err<nom::error::VerboseError<&'a str>>> for Error<'a> {
-    fn from(err: nom::Err<nom::error::VerboseError<&'a str>>) -> Self {
-        match err {
-            nom::Err::Incomplete(_) => Error::Incomplete,
-            nom::Err::Error(e) => Error::InvalidSgf(e.clone()),
-            nom::Err::Failure(e) => Error::InvalidSgf(e.clone()),
-        }
-    }
-}
+impl TryFrom<Tree> for Game {
+    type Error = Error;
 
-impl<'a> From<ParseSizeError> for Error<'a> {
-    fn from(_: ParseSizeError) -> Self {
-        Self::InvalidBoardSize
+    fn try_from(tree: Tree) -> Result<Self, Self::Error> {
+        let board_size = match tree.sequence[0].find_prop("SZ") {
+            Some(prop) => Size::try_from(prop.values[0].as_str())?,
+            None => Size {
+                width: 19,
+                height: 19,
+            },
+        };
+        let mut info = GameInfo::default();
+        info.app_name = tree.sequence[0]
+            .find_prop("AP")
+            .map(|prop| prop.values[0].clone());
+        info.black_player = tree.sequence[0]
+            .find_prop("PB")
+            .map(|prop| prop.values.join(", "));
+
+        info.black_rank = tree.sequence[0]
+            .find_prop("BR")
+            .and_then(|prop| Rank::try_from(prop.values[0].as_str()).ok());
+
+        info.white_player = tree.sequence[0]
+            .find_prop("PW")
+            .map(|prop| prop.values.join(", "));
+
+        info.white_rank = tree.sequence[0]
+            .find_prop("WR")
+            .and_then(|prop| Rank::try_from(prop.values[0].as_str()).ok());
+
+        info.result = tree.sequence[0]
+            .find_prop("RE")
+            .and_then(|prop| GameResult::try_from(prop.values[0].as_str()).ok());
+
+        info.time_limits = tree.sequence[0]
+            .find_prop("TM")
+            .and_then(|prop| prop.values[0].parse::<u64>().ok())
+            .and_then(|seconds| Some(std::time::Duration::from_secs(seconds)));
+
+        info.date = tree.sequence[0]
+            .find_prop("DT")
+            .and_then(|prop| {
+                let v = prop
+                    .values
+                    .iter()
+                    .map(|val| parse_date_field(val))
+                    .fold(Ok(vec![]), |acc, v| match (acc, v) {
+                        (Ok(mut acc), Ok(mut values)) => {
+                            acc.append(&mut values);
+                            Ok(acc)
+                        }
+                        (Ok(_), Err(err)) => Err(err),
+                        (Err(err), _) => Err(err),
+                    })
+                    .ok()?;
+                Some(v)
+            })
+            .unwrap_or(vec![]);
+
+        info.event = tree.sequence[0]
+            .find_prop("EV")
+            .map(|prop| prop.values.join(", "));
+
+        info.round = tree.sequence[0]
+            .find_prop("RO")
+            .map(|prop| prop.values.join(", "));
+
+        info.source = tree.sequence[0]
+            .find_prop("SO")
+            .map(|prop| prop.values.join(", "));
+
+        info.game_keeper = tree.sequence[0]
+            .find_prop("US")
+            .map(|prop| prop.values.join(", "));
+
+        Ok(Game {
+            board_size,
+            info,
+
+            tree,
+        })
     }
 }
 
@@ -127,18 +197,9 @@ impl ToString for Rank {
     }
 }
 
-#[derive(Clone, Debug)]
-pub struct GameTree {
-    pub file_format: i8,
-    pub app_name: Option<String>,
-    pub game_type: GameType,
-    pub board_size: Size,
-    pub info: GameInfo,
-    // pub text: String,
-}
-
 #[derive(Clone, Debug, Default)]
 pub struct GameInfo {
+    pub app_name: Option<String>,
     pub annotator: Option<String>,
     pub copyright: Option<String>,
     pub event: Option<String>,
@@ -213,12 +274,6 @@ pub enum Win {
     Time,
 }
 
-#[derive(Clone, Debug, PartialEq)]
-pub enum GameType {
-    Go,
-    Unsupported,
-}
-
 /*
 enum PropType {
     Move,
@@ -241,104 +296,13 @@ enum PropValue {
 }
 */
 
-pub fn parse_sgf<'a>(input: &'a str) -> Result<Vec<GameTree>, Error<'a>> {
-    let (_, trees) = parse_collection::<nom::error::VerboseError<&'a str>>(input)?;
-
-    let games = trees
-        .into_iter()
-        .map(|tree| {
-            let file_format = match tree.sequence[0].find_prop("FF") {
-                Some(prop) => prop.values[0].parse::<i8>().unwrap(),
-                None => 4,
-            };
-            let app_name = tree.sequence[0]
-                .find_prop("AP")
-                .map(|prop| prop.values[0].clone());
-            let board_size = match tree.sequence[0].find_prop("SZ") {
-                Some(prop) => Size::try_from(prop.values[0].as_str())?,
-                None => Size {
-                    width: 19,
-                    height: 19,
-                },
-            };
-            let mut info = GameInfo::default();
-            info.black_player = tree.sequence[0]
-                .find_prop("PB")
-                .map(|prop| prop.values.join(", "));
-
-            info.black_rank = tree.sequence[0]
-                .find_prop("BR")
-                .and_then(|prop| Rank::try_from(prop.values[0].as_str()).ok());
-
-            info.white_player = tree.sequence[0]
-                .find_prop("PW")
-                .map(|prop| prop.values.join(", "));
-
-            info.white_rank = tree.sequence[0]
-                .find_prop("WR")
-                .and_then(|prop| Rank::try_from(prop.values[0].as_str()).ok());
-
-            info.result = tree.sequence[0]
-                .find_prop("RE")
-                .and_then(|prop| GameResult::try_from(prop.values[0].as_str()).ok());
-
-            info.time_limits = tree.sequence[0]
-                .find_prop("TM")
-                .and_then(|prop| prop.values[0].parse::<u64>().ok())
-                .and_then(|seconds| Some(std::time::Duration::from_secs(seconds)));
-
-            info.date = tree.sequence[0]
-                .find_prop("DT")
-                .and_then(|prop| {
-                    let v = prop
-                        .values
-                        .iter()
-                        .map(|val| parse_date_field(val))
-                        .fold(Ok(vec![]), |acc, v| match (acc, v) {
-                            (Ok(mut acc), Ok(mut values)) => {
-                                acc.append(&mut values);
-                                Ok(acc)
-                            }
-                            (Ok(_), Err(err)) => Err(err),
-                            (Err(err), _) => Err(err),
-                        })
-                        .ok()?;
-                    Some(v)
-                })
-                .unwrap_or(vec![]);
-
-            info.event = tree.sequence[0]
-                .find_prop("EV")
-                .map(|prop| prop.values.join(", "));
-
-            info.round = tree.sequence[0]
-                .find_prop("RO")
-                .map(|prop| prop.values.join(", "));
-
-            info.source = tree.sequence[0]
-                .find_prop("SO")
-                .map(|prop| prop.values.join(", "));
-
-            info.game_keeper = tree.sequence[0]
-                .find_prop("US")
-                .map(|prop| prop.values.join(", "));
-
-            Ok(GameTree {
-                file_format,
-                app_name,
-                game_type: GameType::Go,
-                board_size,
-                info,
-            })
-        })
-        .collect::<Result<Vec<GameTree>, Error>>()?;
-    Ok(games)
-}
-
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::{date::Date, tree::Size};
+    use crate::{
+        date::Date,
+        tree::{parse_collection, Size},
+    };
     use std::fs::File;
     use std::io::Read;
 
@@ -347,12 +311,16 @@ mod tests {
 (;C[f](;C[g];C[h];C[i])
 (;C[j])))";
 
-    fn with_text(text: &str, f: impl FnOnce(Vec<GameTree>)) {
-        let games = parse_sgf(text).unwrap();
+    fn with_text(text: &str, f: impl FnOnce(Vec<Game>)) {
+        let (_, games) = parse_collection::<nom::error::VerboseError<&str>>(text).unwrap();
+        let games = games
+            .into_iter()
+            .map(|game| Game::try_from(game).expect("game to parse"))
+            .collect::<Vec<Game>>();
         f(games);
     }
 
-    fn with_file(path: &std::path::Path, f: impl FnOnce(Vec<GameTree>)) {
+    fn with_file(path: &std::path::Path, f: impl FnOnce(Vec<Game>)) {
         let mut file = File::open(path).unwrap();
         let mut text = String::new();
         let _ = file.read_to_string(&mut text);
@@ -364,9 +332,7 @@ mod tests {
         with_text(EXAMPLE, |trees| {
             assert_eq!(trees.len(), 1);
             let tree = &trees[0];
-            assert_eq!(tree.file_format, 4);
-            assert_eq!(tree.app_name, None);
-            assert_eq!(tree.game_type, GameType::Go);
+            assert_eq!(tree.info.app_name, None);
             assert_eq!(
                 tree.board_size,
                 Size {
@@ -380,9 +346,7 @@ mod tests {
         with_file(std::path::Path::new("test_data/print1.sgf"), |trees| {
             assert_eq!(trees.len(), 1);
             let tree = &trees[0];
-            assert_eq!(tree.file_format, 4);
-            assert_eq!(tree.app_name, None);
-            assert_eq!(tree.game_type, GameType::Go);
+            assert_eq!(tree.info.app_name, None);
             assert_eq!(
                 tree.board_size,
                 Size {
diff --git a/sgf/src/lib.rs b/sgf/src/lib.rs
new file mode 100644
index 0000000..4b4f8fa
--- /dev/null
+++ b/sgf/src/lib.rs
@@ -0,0 +1,96 @@
+mod date;
+pub use date::Date;
+
+pub mod go;
+
+mod tree;
+use tree::parse_collection;
+
+use thiserror::Error;
+
+#[derive(Debug)]
+pub enum Error {
+    InvalidField,
+    InvalidBoardSize,
+    Incomplete,
+    InvalidSgf(VerboseNomError),
+}
+
+#[derive(Debug)]
+pub struct VerboseNomError(nom::error::VerboseError<String>);
+
+impl From<nom::error::VerboseError<&str>> for VerboseNomError {
+    fn from(err: nom::error::VerboseError<&str>) -> Self {
+        VerboseNomError(nom::error::VerboseError {
+            errors: err
+                .errors
+                .into_iter()
+                .map(|err| (err.0.to_owned(), err.1))
+                .collect(),
+        })
+    }
+}
+
+impl From<nom::Err<nom::error::VerboseError<&str>>> for Error {
+    fn from(err: nom::Err<nom::error::VerboseError<&str>>) -> Self {
+        match err {
+            nom::Err::Incomplete(_) => Error::Incomplete,
+            nom::Err::Error(e) => Error::InvalidSgf(VerboseNomError::from(e)),
+            nom::Err::Failure(e) => Error::InvalidSgf(VerboseNomError::from(e)),
+        }
+    }
+}
+
+#[derive(Debug, PartialEq, Error)]
+pub enum ParseError {
+    #[error("An unknown error was found")]
+    NomError(nom::error::Error<String>),
+}
+
+impl From<nom::error::Error<&str>> for ParseError {
+    fn from(err: nom::error::Error<&str>) -> Self {
+        Self::NomError(nom::error::Error {
+            input: err.input.to_owned(),
+            code: err.code.clone(),
+        })
+    }
+}
+
+pub enum Game {
+    Go(go::Game),
+    Unsupported(tree::Tree),
+}
+
+pub fn parse_sgf(input: &str) -> Result<Vec<Game>, Error> {
+    let (_, trees) = parse_collection::<nom::error::VerboseError<&str>>(input)?;
+    Ok(trees
+        .into_iter()
+        .map(|t| match t.sequence[0].find_prop("GM") {
+            Some(prop) if prop.values == vec!["1".to_owned()] => {
+                Game::Go(go::Game::try_from(t).expect("properly structured game tree"))
+            }
+            _ => Game::Unsupported(t),
+        })
+        .collect::<Vec<Game>>())
+}
+
+/*
+impl From<(&str, VerboseErrorKind)> for
+
+impl From<nom::error::VerboseError<&str>> for ParseError {
+    fn from(err: nom::error::VerboseError<&str>) -> Self {
+        Self::NomErrors(
+            err.errors
+                .into_iter()
+                .map(|err| ParseError::from(err))
+                .collect(),
+        )
+        /*
+        Self::NomError(nom::error::Error {
+            input: err.input.to_owned(),
+            code: err.code.clone(),
+        })
+        */
+    }
+}
+*/
diff --git a/go-sgf/src/tree.rs b/sgf/src/tree.rs
similarity index 98%
rename from go-sgf/src/tree.rs
rename to sgf/src/tree.rs
index 7c2681d..59d24c0 100644
--- a/go-sgf/src/tree.rs
+++ b/sgf/src/tree.rs
@@ -1,3 +1,4 @@
+use crate::Error;
 use nom::{
     branch::alt,
     bytes::complete::{escaped_transform, tag},
@@ -9,6 +10,12 @@ use nom::{
 };
 use std::num::ParseIntError;
 
+impl From<ParseSizeError> for Error {
+    fn from(_: ParseSizeError) -> Self {
+        Self::InvalidBoardSize
+    }
+}
+
 #[derive(Debug)]
 pub enum ParseSizeError {
     ParseIntError(ParseIntError),
@@ -45,7 +52,7 @@ impl TryFrom<&str> for Size {
     }
 }
 
-#[derive(Debug, PartialEq)]
+#[derive(Clone, Debug, PartialEq)]
 pub struct Tree {
     pub sequence: Vec<Node>,
     pub sub_sequences: Vec<Tree>,
@@ -67,7 +74,7 @@ impl ToString for Tree {
     }
 }
 
-#[derive(Debug, PartialEq)]
+#[derive(Clone, Debug, PartialEq)]
 pub struct Node {
     pub properties: Vec<Property>,
 }
diff --git a/go-sgf/test_data/2020 USGO DDK, Round 1.sgf b/sgf/test_data/2020 USGO DDK, Round 1.sgf
similarity index 100%
rename from go-sgf/test_data/2020 USGO DDK, Round 1.sgf
rename to sgf/test_data/2020 USGO DDK, Round 1.sgf
diff --git a/go-sgf/test_data/2020 USGO DDK, Round 3.sgf b/sgf/test_data/2020 USGO DDK, Round 3.sgf
similarity index 100%
rename from go-sgf/test_data/2020 USGO DDK, Round 3.sgf
rename to sgf/test_data/2020 USGO DDK, Round 3.sgf
diff --git a/go-sgf/test_data/33745402-213-Ormos-savanni.dgerinel.sgf b/sgf/test_data/33745402-213-Ormos-savanni.dgerinel.sgf
similarity index 100%
rename from go-sgf/test_data/33745402-213-Ormos-savanni.dgerinel.sgf
rename to sgf/test_data/33745402-213-Ormos-savanni.dgerinel.sgf
diff --git a/go-sgf/test_data/9kyu-lecture.sgf b/sgf/test_data/9kyu-lecture.sgf
similarity index 100%
rename from go-sgf/test_data/9kyu-lecture.sgf
rename to sgf/test_data/9kyu-lecture.sgf
diff --git a/go-sgf/test_data/ff4_a.sgf b/sgf/test_data/ff4_a.sgf
similarity index 100%
rename from go-sgf/test_data/ff4_a.sgf
rename to sgf/test_data/ff4_a.sgf
diff --git a/go-sgf/test_data/ff4_b.sgf b/sgf/test_data/ff4_b.sgf
similarity index 100%
rename from go-sgf/test_data/ff4_b.sgf
rename to sgf/test_data/ff4_b.sgf
diff --git a/go-sgf/test_data/ff4_ex.sgf b/sgf/test_data/ff4_ex.sgf
similarity index 100%
rename from go-sgf/test_data/ff4_ex.sgf
rename to sgf/test_data/ff4_ex.sgf
diff --git a/go-sgf/test_data/linebreak_tests.sgf b/sgf/test_data/linebreak_tests.sgf
similarity index 100%
rename from go-sgf/test_data/linebreak_tests.sgf
rename to sgf/test_data/linebreak_tests.sgf
diff --git a/go-sgf/test_data/print1.sgf b/sgf/test_data/print1.sgf
similarity index 100%
rename from go-sgf/test_data/print1.sgf
rename to sgf/test_data/print1.sgf
diff --git a/go-sgf/test_data/print2.sgf b/sgf/test_data/print2.sgf
similarity index 100%
rename from go-sgf/test_data/print2.sgf
rename to sgf/test_data/print2.sgf