给出5个可以免费下载的最强的cpu国际象棋引擎和他们的等级分，下载链接

Choosing top engines and gathering resources

I’ve identified five engines with solid ratings: Stockfish 17 (3642), Obsidian 14 (3618), Berserk 13 (3616), PlentyChess 2.1.0 (3611), and Caissa 1.20 (3610). I’ll select these, but since Caissa’s rating is better than Ethereal’s, I’ll include it instead. Caissa is open-source—checked the GitHub repository. Now, I’ll gather legitimate download links for each of them from GitHub and official sources. We already have links for Stockfish and Obsidian, and I need to finish capturing details for Berserk, Caissa, and PlentyChess.

Thought for 53 seconds