App: Stockfish Chess
Developer: Daylen Yang
Genres: Games, Education, Board, Strategy

Stockfish is a powerful chess analysis app. Play two-player games on the beautiful chess board, or get instant accurate analysis of any game. Stockfish will tell you who's winning and calculate the best move.

Features:

INTERACTIVE, IMMERSIVE BOARD
Stockfish has a gorgeous board that looks fantastic on Retina Displays. It's full of nice touches: when you click or drag a piece, its destination squares are highlighted in yellow, and the best move is shown with a red arrow. Plus, you can go full screen for the most immersive chess experience.

TOP-NOTCH CHESS ANALYSIS
Analysis is powered by the Stockfish chess engine, the strongest free chess engine in the world. You're getting top-notch analysis that surpasses the strongest human chess grandmasters.

ADVANCED FEATURES
Stockfish has many enhancements for advanced users. You can browse through multi-game PGN files, copy and paste FEN strings, utilize Syzygy endgame tablebases, and use MultiPV.

FREE AND OPEN SOURCE
Stockfish is completely free, and the source code is available on our website (stockfishchess.org) under the GPLv3 license.

Release notes:
Updates the engine to the October 27, 2023 build (Stockfish dev-20231027-347d613b). Includes the following enhancements:

- Quality of chess play: Stockfish continues to demonstrate its ability to discover superior moves with remarkable speed. In self-play against Stockfish 15, this new release gains up to 50 Elo and wins up to 12 times more game pairs than it loses. 
- Neural network: This updated version of Stockfish introduces several enhancements, including an upgraded neural net architecture (SFNNv6), improved implementation, and refined parameterization
- New evaluation: An evaluation of +1 is now no longer tied to the value of one pawn, but to the likelihood of winning the game. With a +1 evaluation, Stockfish has now a 50% chance of winning the game against an equally strong opponent. This convention scales down evaluations a bit compared to Stockfish 15 and allows for consistent evaluations in the future.