diff --git a/README.md b/README.md
index 1aa6645..7a159aa 100644
--- a/README.md
+++ b/README.md
@@ -318,6 +318,10 @@ None.
     so that offline-only game can work in all browsers fully supporting Web Components
     (i.e. Blink-based and Firefox not older than 2018);
     right now ES2022 is targeted.
+* Figure out better API for game board,
+    `board.get(row, column)` and `board.get(row, column)` seemed to be a good way to encapsulate readonly state,
+    but they became very inconvenient as the codebase grew and became more complex,
+    considering that board does not even expose its dimensions.
 * Figure out better and more consistent naming and project structure.
 * Implement end-to-end tests with puppeteer / chromedriver (and run them both with JS enabled and with JS disabled).
 * Implement unit tests for remaining shared code.