For every pair crossed out at the bottom, the node above it (on the second-to-last level) becomes a new "leaf" where a player's name is written. This ensures exactly starting positions.
You can view detailed project instructions in the Teacher's Guide by Rudchenko. Option 2: Matveeva (Workbook, Part 1) gdz po informatike dlia 4 klassa stranitsa 32 n
May ask you to identify the "Source" and "Receiver" of information in a specific scenario. For every pair crossed out at the bottom,
Which is listed on your textbook cover, or what does the first sentence of the problem say? gdz po informatike dlia 4 klassa stranitsa 32 n
Example: A teacher (Source) telling a story to a student (Receiver).
Use a resource like Gdz.ru or Euroki and select your specific author and part number.