#STOCKFISH 15 ANALYSIS BOARD PROFESSIONAL#

LCZero considers around 1000x fewer nodes per second than Stockfish, but it applies a much stronger evaluation method. For example, Stockfish operates with the so-called 'thin' nodes (little evaluation for a much bigger number of nodes), while Leela Chess Zero operates with 'thick' nodes (better evaluation for a smaller number of nodes). Different engines use different algorithms and methods to achieve it, so it does not make much sense to compare the number of nodes or depth of different engines. The goal of a chess engine is to effectively allocate the recourses of CPUs it's using between these three functions. Higher speeds are possible to reach only with cloud servers: from 100,000 to 1 million kN/s and even higher if needed.īut is more always better? Chess engines have three primary functions: searching different continuations (NPS), evaluating them, and calculating as many moves as possible (depth). A local high-end computer, on the other hand, can support up to 20,000 kN/s and a special pay-top-dollar local server, which may be owned by some super GMs only, will provide around 50,000kN/s. Stockfish working on 4 CPUs of an average local computer considers around 5,000k nodes per second, which is insufficient for in-depth analysis. You can ask the computer science experts or find a solution in the FAQ if you still don't understand how a chess engine works. Every legal move creates a new position, known as a child node, and each of those child nodes, in turn, grows into more branches with every legal move.ĭespite the popular belief that it is the depth of the engine analysis that decides its credibility, the truth is that the depth value is heavily dependent on and should only be viewed with regard to NPS. This process can be described as a decision tree with its root being the current position. Once you make a move, the engine starts calculating various continuations in search of the best move. castling rights, repetition of moves, move turn, etc.

Thus, 45,000,000 NPS = 45,000 kN/s = 45 MN/s.Ī node, in turn, is a chess position with its evaluation and history, i.e. You may often see NPS calculated in kN/s (kilo nodes per second) or MN/s to denote the number by one thousand or one million respectively. It indicates the number of positions the engine considers in one second. Nodes per second (NPS) is the main measure of chess engines’ speed. In fact, it may sometimes be even more talkative than the depth. Nodes per second or NPS, as it is often referred to, can tell much about the credibility of engine analysis. And yet, many players may ignore an equally important value called NPS. The higher it is the better the analyses are supposed to be. For example, the depth value is the first number that catches the eye.

And while most players use them on a daily basis, they may not fully understand the importance and correlation of the values they show during analysis.

#STOCKFISH 15 ANALYSIS BOARD PROFESSIONAL#

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Stockfish 15 analysis board