🕶️ A view of its UI (v. 1.5.9), with the chessboard showing a game where Black is checkmated on the left, the AI's reflection graph on the right, and the analyzed positions at the bottom. 📚️ Nibbler is a libre, multi-platform, real-time analysis GUI for Leela Chess Zero (Lc0), which runs Leela in the background and constantly displays current position information. The player can also force the engine to evaluate one or more specific moves. It communicates with the UCI protocol (the most common protocols are CECP aka Winboard/Xboard, and UCI) and can also work with other engines. Nibbler is freely inspired by Lizzie and Sabaki.