Fixes piece movement on the board. Tapping a piece and then a square now moves it reliably, pieces return to their normal size after a tap, and swiping across the board no longer plays a move. Also fixes a brief window after each move where the wrong side’s pieces could be picked up.

Fixes an issue where Delete Account could remove more data than intended, and moves it away from Sign Out to prevent accidental taps. Also fixes several cases where a purchase could fail to restore, including purchases made before signing in and those bought on the web.

Purchases you own now unlock as soon as you return to the app, instead of after a restart.

Bug fixes and improvements to sync reliability.

Finishing a chapter is now a moment. Complete the last puzzle and Boxwood acknowledges it — with a clear path to the next chapter, the next course, or the Studies collection when everything is done. Also in this update: - Puzzles finished by viewing the solution now count toward your progress, so your place in a chapter is always exactly where you left it. - Chapters resume at your first unsolved puzzle, and Next skips puzzles you have already solved. - Finished chapters and courses are marked Complete on the course and home screens. - Fixed a dead end where a wrong answer on a choice puzzle offered no way to try again.

Subtle Chess now teaches the idea behind each position. Every chapter opens with a short primer, positional puzzles show you what to look for, and a tap after solving reveals the named concept with a board diagram.

A more generous free start: the first chapter of every course is now free, alongside all of Mate-in-1. Clearer purchase screen. Every purchase is one-time — yours forever, never a subscription.

This update fixes Sign in with Google, so logging in and syncing your progress across devices now works reliably.