diff --git a/go-sgf/src/lib.rs b/go-sgf/src/lib.rs
index bc24212..d3fc4bb 100644
--- a/go-sgf/src/lib.rs
+++ b/go-sgf/src/lib.rs
@@ -187,35 +187,40 @@ enum PropValue {
     Stone,
 }
 
-pub fn parse_sgf(input: &str) -> Result<GameTree, ParseError> {
-    let (_, tree) = parse_tree(input).finish()?;
+pub fn parse_sgf(input: &str) -> Result<Vec<GameTree>, ParseError> {
+    let (_, trees) = parse_collection(input).finish()?;
 
-    let file_format = match tree.sequence[0].find_prop("FF") {
-        Some(prop) => prop.values[0].parse::<i8>().unwrap(),
-        None => 4,
-    };
-    let app = tree.sequence[0]
-        .find_prop("AP")
-        .map(|prop| prop.values[0].clone());
-    let board_size = match tree.sequence[0].find_prop("SZ") {
-        Some(prop) => {
-            let (_, size) = parse_size(prop.values[0].as_str()).finish()?;
-            size
-        }
-        None => Size {
-            width: 19,
-            height: 19,
-        },
-    };
+    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 = tree.sequence[0]
+                .find_prop("AP")
+                .map(|prop| prop.values[0].clone());
+            let board_size = match tree.sequence[0].find_prop("SZ") {
+                Some(prop) => {
+                    let (_, size) = parse_size(prop.values[0].as_str()).finish()?;
+                    size
+                }
+                None => Size {
+                    width: 19,
+                    height: 19,
+                },
+            };
 
-    Ok(GameTree {
-        file_format,
+            Ok(GameTree {
+                file_format,
 
-        app,
-        game_type: GameType::Go,
-        board_size,
-        text: input.to_owned(),
-    })
+                app,
+                game_type: GameType::Go,
+                board_size,
+                text: input.to_owned(),
+            })
+        })
+        .collect()
 }
 
 #[derive(Debug, PartialEq)]
@@ -282,11 +287,15 @@ impl ToString for Property {
     }
 }
 
+fn parse_collection(input: &str) -> IResult<&str, Vec<Tree>> {
+    separated_list1(multispace0, parse_tree)(input)
+}
+
 // note: must preserve unknown properties
 // note: must fix or preserve illegally formatted game-info properties
 // note: must correct or delete illegally foramtted properties, but display a warning
 fn parse_tree(input: &str) -> IResult<&str, Tree> {
-    println!("parse_tree: {}", input);
+    println!(":: parse_tree: {}", input);
     let (input, _) = multispace0(input)?;
     delimited(tag("("), parse_sequence, tag(")"))(input)
 }
@@ -307,7 +316,7 @@ fn parse_sequence(input: &str) -> IResult<&str, Tree> {
 }
 
 fn parse_node(input: &str) -> IResult<&str, Node> {
-    println!("parse_node: {}", input);
+    println!(":: parse_node: {}", input);
     let (input, _) = multispace0(input)?;
     let (input, _) = tag(";")(input)?;
     let (input, properties) = many1(parse_property)(input)?;
@@ -315,7 +324,7 @@ fn parse_node(input: &str) -> IResult<&str, Node> {
 }
 
 fn parse_property(input: &str) -> IResult<&str, Property> {
-    println!("parse_property: {}", input);
+    println!(":: parse_property: {}", input);
     let (input, _) = multispace0(input)?;
     let (input, ident) = alpha1(input)?;
     let (input, values) = many1(delimited(tag("["), take_until("]"), tag("]")))(input)?;
@@ -537,7 +546,6 @@ mod tests {
     #[test]
     fn it_can_regenerate_the_tree() {
         let (_, tree1) = parse_tree(EXAMPLE).unwrap();
-        println!("{}", tree1.to_string());
         assert_eq!(
             tree1.to_string(),
             "(;FF[4]C[root](;C[a];C[b](;C[c])(;C[d];C[e]))(;C[f](;C[g];C[h];C[i])(;C[j])))"
@@ -546,11 +554,11 @@ mod tests {
         assert_eq!(tree1, tree2);
     }
 
-    fn with_text(text: &str, f: impl FnOnce(GameTree)) {
+    fn with_text(text: &str, f: impl FnOnce(Vec<GameTree>)) {
         f(parse_sgf(text).unwrap());
     }
 
-    fn with_file(path: &std::path::Path, f: impl FnOnce(GameTree)) {
+    fn with_file(path: &std::path::Path, f: impl FnOnce(Vec<GameTree>)) {
         let mut file = File::open(path).unwrap();
         let mut text = String::new();
         let _ = file.read_to_string(&mut text);
@@ -559,7 +567,9 @@ mod tests {
 
     #[test]
     fn it_parses_game_root() {
-        with_text(EXAMPLE, |tree| {
+        with_text(EXAMPLE, |trees| {
+            assert_eq!(trees.len(), 1);
+            let tree = &trees[0];
             assert_eq!(tree.file_format, 4);
             assert_eq!(tree.app, None);
             assert_eq!(tree.game_type, GameType::Go);
@@ -573,7 +583,9 @@ mod tests {
             assert_eq!(tree.text, EXAMPLE.to_owned());
         });
 
-        with_file(std::path::Path::new("test_data/print1.sgf"), |tree| {
+        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, None);
             assert_eq!(tree.game_type, GameType::Go);
@@ -586,4 +598,9 @@ mod tests {
             );
         });
     }
+
+    #[test]
+    fn it_parses_ff4_ex() {
+        with_file(std::path::Path::new("test_data/ff4_ex.sgf"), |tree| {});
+    }
 }