GamePatchNote Digest
Immersion Chess Patch Notes — September 4, 2017
Aggregated from Steam, cross-tracked with Battle.net coverage on GamePatchNote.
Summary
This update comes equipped with a greatly improved AI for singleplayer. There is a bigger range of difficulty to choose and AI player responds much quicker than before. We implemented a new and more diversified Opening Book that takes into account the frequency of real chess games moves in order to make the AI feel more natural to play against. Achievements have also been added along with a new option to overview previous game. Now both Singleplayer and Multiplayer modes have the option to play with increment per move. For new players, we have created a basic tutorial on Steam. Update also comes with several new facilities that are listed at the bottom.
Faster and stronger AI
Harder AIs are much more difficult to play against while easier AI modes are less difficult than before
Movement speed depends on time settings:
https://youtu.be/ZYKzBJht2Eo
Achievements
http://steamcommunity.com/stats/631660/achievements

Stronger Opening book
Randomized moves are based on occurrence probability
Based on 300k high level games
Diversified lines

Game overview
Game Overview is accessed by clicking on the History Board
Overview remembers movement and game times
VR Game Overview is controlled with Thumbsticks and Trackpads
Non-VR Game Overview is controlled by keyboard arrows and scroll wheel
https://youtu.be/lmlZ3CkdGuo
Time Increment in Clock
Customizable time increment in Single Player
Standardized increment options on Multiplayer

Official guide
http://steamcommunity.com/sharedfiles/filedetails/?id=1122959250
Non-VR opponent piece tracking

Other Changes:
Targeted squares are highlighted to reduce mistakes when moving pieces
A red ping alerts players when a piece cannot be moved (ie. not Player turn)
Non-VR opponent pieces are tracked during the move and are visible to the player
AI difficulty is labeled
Animations notify the player when their opponent time is up
Rematch option has been added
Pieces can now return to their squares through animation, though not all at once
Font is improved
Sound confirmation has been added upon on opponent’s selection of the “Ready” button
Changes to VR interface only
Calibration now includes rotation by pressing the Thumbstick or Trackpad
The second controller disappears while not in use
Pieces can be moved by using the “Grab” button
Changes to Non-VR interfaces only
Pieces can be now smoothly moved from square to square
Moving pieces only involves selecting the squares beneath them instead of grabbing the pieces themselves
Fixes
The game is ended by “#” only on checkmate
The engine takes into account “Insufficient Material” rules
A “50 moves” rule countdown has been added
Opponent castles now go through an animation