Finished

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

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 def parse(input_string: str) -> SgfTree:
+    pass
+    """
+    Parse an SGF (Smart Game Format) string and return a tree structure of properties.
+    Args:
+        input_string: A string containing SGF formatted data
+    Returns:
+        SgfTree: A tree structure representing the SGF data
+    Raises:
+        ValueError: If the input string is invalid according to SGF format rules
+    """
+    # Edge Case: Empty input or doesn't start with '('
+    if not input_string or not input_string.startswith('('):
+        raise ValueError("tree missing")
+    # Edge Case: Doesn't end with ')'
+    if not input_string.endswith(')'):
+        raise ValueError("tree missing")
+    # Remove the outer parentheses
+    content = input_string[1:-1]
+    # Edge Case: Empty content after removing parentheses
+    if not content:
+        raise ValueError("tree with no nodes")
+    return _parse_tree(content)
+def _parse_tree(content: str) -> SgfTree:
+    """
+    Parse the content of a tree (without outer parentheses).
+    """
+    # Find the first semicolon to separate the root node from children
+    semicolon_index = content.find(';')
+    # Edge Case: No semicolon means no nodes
+    if semicolon_index == -1:
+        raise ValueError("tree with no nodes")
+    # Parse the root node properties
+    root_content = content[1:semicolon_index]  # Skip the first semicolon
+    properties = _parse_properties(root_content)
+    # Parse children
+    children_content = content[semicolon_index+1:]
+    children = _parse_children(children_content)
+    return SgfTree(properties=properties, children=children)
+def _parse_properties(content: str) -> dict:
+    """
+    Parse properties from a string.
+    """
+    properties = {}
+    i = 0
+    while i < len(content):
+        # Skip whitespace
+        if content[i].isspace():
+            i += 1
+            continue
+        # Parse key (must be uppercase)
+        key_start = i
+        while i < len(content) and content[i].isalpha():
+            if not content[i].isupper():
+                raise ValueError("property must be in uppercase")
+            i += 1
+        # Edge Case: No key found
+        if i == key_start:
+            raise ValueError("properties without delimiter")
+        key = content[key_start:i]
+        # Edge Case: No opening bracket after key
+        if i >= len(content) or content[i] != '[':
+            raise ValueError("properties without delimiter")
+        i += 1  # Skip the opening bracket
+        # Parse all values for this key
+        values = []
+        while i < len(content) and content[i] == '[':
+            i += 1  # Skip the opening bracket
+            value_start = i
+            # Parse value, handling escapes
+            while i < len(content) and content[i] != ']':
+                if content[i] == '\\':
+                    i += 2  # Skip escape and next character
+                else:
+                    i += 1
+            # Edge Case: Unclosed bracket
+            if i >= len(content) or content[i] != ']':
+                raise ValueError("properties without delimiter")
+            value = content[value_start:i]
+            value = _unescape_value(value)
+            values.append(value)
+            i += 1  # Skip the closing bracket
+        properties[key] = values
+    return properties
+def _unescape_value(value: str) -> str:
+    """
+    Process escape sequences in a value according to SGF Text type rules.
+    """
+    result = []
+    i = 0
+    while i < len(value):
+        if value[i] == '\\':
+            i += 1
+            if i < len(value):
+                # If next character is newline, remove both \ and newline
+                if value[i] == '\n':
+                    i += 1
+                    continue
+                # If next character is whitespace, convert to space
+                elif value[i].isspace():
+                    result.append(' ')
+                    i += 1
+                # Otherwise, insert as-is
+                else:
+                    result.append(value[i])
+                    i += 1
+            else:
+                # Trailing backslash - should not happen in valid SGF but we handle it
+                result.append('\\')
+        else:
+            # Convert all whitespace (except newline) to spaces
+            if value[i] != '\n' and value[i].isspace():
+                result.append(' ')
+            else:
+                result.append(value[i])
+            i += 1
+    return ''.join(result)
+def _parse_children(content: str) -> list:
+    """
+    Parse children from a string.
+    """
+    children = []
+    i = 0
+    while i < len(content):
+        # Skip whitespace
+        if content[i].isspace():
+            i += 1
+            continue
+        # If we find an opening parenthesis, it's a subtree
+        if content[i] == '(':
+            # Find matching closing parenthesis
+            paren_count = 1
+            start = i
+            i += 1
+            while i < len(content) and paren_count > 0:
+                if content[i] == '(':
+                    paren_count += 1
+                elif content[i] == ')':
+                    paren_count -= 1
+                i += 1
+            # Edge Case: Unmatched parenthesis
+            if paren_count != 0:
+                raise ValueError("tree missing")
+            subtree_content = content[start:i]
+            children.append(parse(subtree_content))
+        else:
+            # It's a node without parentheses, parse as a sequence
+            # Find the next parenthesis or end of string
+            node_end = i
+            while node_end < len(content) and content[node_end] != '(':
+                node_end += 1
+            node_content = content[i:node_end]
+            # Create a tree node for this content
+            semicolon_index = node_content.find(';')
+            if semicolon_index == -1:
+                # Single node with no semicolon - just properties
+                properties = _parse_properties(node_content)
+                children.append(SgfTree(properties=properties))
+            else:
+                # Node with properties and possibly more children
+                prop_content = node_content[0:semicolon_index]
+                properties = _parse_properties(prop_content)
+                remaining_content = node_content[semicolon_index+1:]
+                # Create node with properties and parse any further children
+                child_node = SgfTree(properties=properties)
+                # If there are more characters, they represent a linear chain
+                if remaining_content:
+                    # Recursively parse the remaining content as children
+                    further_children = _parse_linear_chain(remaining_content)
+                    if further_children:
+                        # Connect the chain properly
+                        current_node = child_node
+                        for next_node in further_children:
+                            current_node.children = [next_node]
+                            current_node = next_node
+                children.append(child_node)
+            i = node_end
+    return children
+def _parse_linear_chain(content: str) -> list:
+    """
+    Parse a linear chain of nodes (e.g., ;B[aa];W[ab])
+    """
+    nodes = []
+    i = 0
+    while i < len(content):
+        # Skip whitespace
+        if content[i].isspace():
+            i += 1
+            continue
+        # Must start with semicolon
+        if content[i] != ';':
+            raise ValueError("tree missing")
+        i += 1
+        # Find the next semicolon or end
+        node_end = i
+        while node_end < len(content) and content[node_end] != ';':
+            node_end += 1
+        node_content = content[i:node_end]
+        properties = _parse_properties(node_content)
+        nodes.append(SgfTree(properties=properties))
+        i = node_end
+    return nodes
+# Handled Edge Cases: Empty input, missing parentheses, missing semicolons, missing brackets, unclosed brackets, unmatched parentheses, lowercase properties, properties without delimiters, empty content after parentheses removal, trailing backslash in values