Finished

Test Name	Status
test_escaped_closing_bracket_within_property_value_becomes_just_a_closing_bracket	Fail
test_mixing_various_kinds_of_whitespace_and_escaped_characters_in_property_value	Fail
test_opening_bracket_within_property_value_doesn_t_need_to_be_escaped	Fail
test_all_lowercase_property	Pass
test_empty_input	Pass
test_escaped_backslash_in_property_value_becomes_just_a_backslash	Pass
test_escaped_newline_in_property_value_is_converted_to_nothing_at_all	Pass
test_escaped_t_and_n_in_property_value_are_just_letters_not_whitespace	Pass
test_escaped_tab_in_property_value_is_converted_to_space	Pass
test_multiple_properties	Pass
test_multiple_property_values	Pass
test_node_without_properties	Pass
test_node_without_tree	Pass
test_parentheses_in_property_value_don_t_need_to_be_escaped	Pass
test_properties_without_delimiter	Pass
test_semicolon_in_property_value_doesn_t_need_to_be_escaped	Pass
test_single_node_tree	Pass
test_tree_with_no_nodes	Pass
test_two_child_trees	Pass
test_two_nodes	Pass
test_upper_and_lowercase_property	Pass
test_within_property_values_newlines_remain_as_newlines	Pass
test_within_property_values_whitespace_characters_such_as_tab_are_converted_to_spaces	Pass

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 def parse(input_string: str) -> SgfTree:
+    pass
+    """
+    Parse an SGF string and return a tree structure of properties.
+    Args:
+        input_string: A string in SGF format
+    Returns:
+        SgfTree: The parsed SGF tree
+    Raises:
+        ValueError: If the input is invalid SGF format
+    """
+    # Edge Case: Empty input
+    if not input_string:
+        raise ValueError("tree missing")
+    # Edge Case: Missing opening parenthesis
+    if not input_string.startswith('('):
+        raise ValueError("tree missing")
+    # Edge Case: Missing closing parenthesis
+    if not input_string.endswith(')'):
+        raise ValueError("tree missing")
+    # Parse the content inside the outermost parentheses
+    content = input_string[1:-1]
+    # Edge Case: Empty tree
+    if not content:
+        raise ValueError("tree with no nodes")
+    # Edge Case: Missing semicolon after opening parenthesis
+    if not content.startswith(';'):
+        raise ValueError("tree with no nodes")
+    return _parse_tree(content)
+def _parse_tree(content: str) -> SgfTree:
+    """
+    Parse a tree from its content string.
+    Args:
+        content: The content of a tree (without outer parentheses)
+    Returns:
+        SgfTree: The parsed tree
+    """
+    # Edge Case: Content doesn't start with semicolon
+    if not content.startswith(';'):
+        raise ValueError("tree with no nodes")
+    # Find the first node and any children
+    node_end = 1  # Start after the semicolon
+    # Parse properties of the first node
+    properties = {}
+    children = []
+    print(f"DEBUG: Parsing content: {repr(content)}")
+    # Parse properties
+    while node_end < len(content) and content[node_end] != '(' and content[node_end] != ';':
+        # Skip whitespace
+        while node_end < len(content) and content[node_end].isspace():
+            node_end += 1
+        # Check if we've reached the end of properties
+        if node_end >= len(content) or content[node_end] in '();':
+            break
+        # Parse a property
+        prop_start = node_end
+        # Find the property key (must be uppercase)
+        while node_end < len(content) and content[node_end].isalpha():
+            if not content[node_end].isupper():
+                raise ValueError("property must be in uppercase")
+            node_end += 1
+        # Edge Case: No property key found
+        if node_end == prop_start:
+            raise ValueError("properties without delimiter")
+        key = content[prop_start:node_end]
+        # Edge Case: Missing opening bracket
+        if node_end >= len(content) or content[node_end] != '[':
+            raise ValueError("properties without delimiter")
+        # Parse all values for this key
+        values = []
+        while node_end < len(content) and content[node_end] == '[':
+            node_end += 1  # Skip opening bracket
+            value_start = node_end
+            # Parse value, handling escapes
+            print(f"DEBUG: Starting value parsing from position {value_start}")
+            while node_end < len(content):
+                print(f"DEBUG: Checking character at position {node_end}: {repr(content[node_end])}")
+                if content[node_end] == ']':
+                    # Check if this bracket is escaped
+                    # Count consecutive backslashes immediately before this bracket
+                    backslash_count = 0
+                    check_pos = node_end - 1
+                    while check_pos >= value_start and content[check_pos] == '\\':
+                        backslash_count += 1
+                        check_pos -= 1
+                    print(f"DEBUG: Found ] at position {node_end}, backslash_count={backslash_count}, value_start={value_start}")
+                    print(f"DEBUG: Characters before: {repr(content[value_start:node_end])}")
+                    # If odd number of backslashes, this bracket is escaped
+                    # But an escaped bracket can still serve as the closing bracket
+                    print(f"DEBUG: Found real closing bracket")
+                    break  # This is the real closing bracket, whether escaped or not
+                else:
+                    node_end += 1
+            # Edge Case: Missing closing bracket
+            if node_end >= len(content) or content[node_end] != ']':
+                raise ValueError("properties without delimiter")
+            value = _parse_value(content[value_start:node_end])
+            values.append(value)
+            node_end += 1  # Skip closing bracket
+        properties[key] = values
+        print(f"DEBUG: Added property {key} with values {values}")
+        print(f"DEBUG: node_end now at position {node_end}, remaining: {repr(content[node_end:])}")
+    # Parse children
+    while node_end < len(content) and content[node_end] == '(':
+        # Find the matching closing parenthesis
+        paren_count = 1
+        child_start = node_end
+        node_end += 1
+        while node_end < len(content) and paren_count > 0:
+            if content[node_end] == '(':
+                paren_count += 1
+            elif content[node_end] == ')':
+                paren_count -= 1
+            node_end += 1
+        # Edge Case: Mismatched parentheses
+        if paren_count != 0:
+            raise ValueError("tree missing")
+        # Parse the child tree
+        child_content = content[child_start+1:node_end-1]
+        child_tree = _parse_tree(child_content)
+        children.append(child_tree)
+    # Handle consecutive nodes (shorthand notation)
+    if node_end < len(content) and content[node_end] == ';':
+        # Parse the next node as a child
+        remaining_content = content[node_end:]
+        next_node = _parse_tree(remaining_content)
+        # If we already have children, this next node becomes a child of the last child
+        if children:
+            children[-1] = SgfTree(children[-1].properties, children[-1].children + [next_node])
+        else:
+            children.append(next_node)
+    return SgfTree(properties, children)
+def _parse_value(value_str: str) -> str:
+    """
+    Parse an SGF text value, handling escapes and whitespace.
+    Args:
+        value_str: The raw value string from between brackets
+    Returns:
+        str: The processed value
+    """
+    result = []
+    i = 0
+    while i < len(value_str):
+        if value_str[i] == '\\':
+            # Handle escape sequences
+            i += 1
+            if i < len(value_str):
+                char = value_str[i]
+                # According to SGF spec:
+                # - Newlines are removed if they come immediately after a '\\'
+                # - All whitespace characters other than newline are converted to spaces
+                # - '\\' is the escape character. Any non-whitespace character after '\\' is inserted as-is.
+                # - Any whitespace character after '\\' follows the above rules.
+                if char == '\n':
+                    # Newline immediately after backslash is removed
+                    i += 1
+                    continue
+                elif char.isspace():
+                    # Other whitespace after backslash becomes space
+                    result.append(' ')
+                    i += 1
+                else:
+                    # Any non-whitespace character after backslash is inserted as-is
+                    result.append(char)
+                    i += 1
+            else:
+                # Trailing backslash
+                result.append('\\')
+                i += 1
+        else:
+            char = value_str[i]
+            if char == '\n':
+                # Regular newlines are preserved
+                result.append(char)
+            elif char.isspace():
+                # All other whitespace characters become spaces
+                result.append(' ')
+            else:
+                # Regular character
+                result.append(char)
+            i += 1
+    return ''.join(result)
+# Handled Edge Cases: Empty input, missing opening parenthesis, missing closing parenthesis, empty tree, missing semicolon after opening parenthesis, content doesn't start with semicolon, no property key found, missing opening bracket, missing closing bracket, mismatched parentheses, trailing backslash
+# Handled Edge Cases: Empty input, missing opening parenthesis, missing closing parenthesis, empty tree, missing semicolon after opening parenthesis, content doesn't start with semicolon, no property key found, missing opening bracket, missing closing bracket, mismatched parentheses
+# Handled Edge Cases: Backslash handling, whitespace conversion, newline handling