Infinite Analysis

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By default infinite analysis in Rybka Aquarium is started in single variation mode. Most often this mode allows you to find the best move quicker than in multi-variation mode. The engine sequentially searches variations initially to depth 1, then to depth 2 and so on. Every increase in depth demands considerably longer analysis time than the previous depth. For the first few seconds of analysis you will see quick updates to the main variation and evaluation. Then it slows down and you have to wait longer for the engine to reach the next depth. Due to this reason it is generally not recommended to let infinite analysis run for a very long time in the same position. Instead, browse the main variations manually and restart infinite analysis from the next interesting position, or use other analysis methods. You can also take the variation produced by infinite analysis and work your way backwards from the end of the variation towards the first move, analyzing each position with infinite analysis. This method sometimes finds new and interesting moves. In spite of what has been said above, it may occasionally be interesting to to run a very long single-variation analysis in extremely complex positions.

If the quickest way for getting the best variation is not your main goal, and you want to know more about possible moves, use multi-variation analysis. Multi-variation mode may even occasionally discover a better move in a shorter time than single variation mode.

Another way of finding additional lines with different first moves is by ignoring previously considered moves.

If you need a deep understanding of the position and where different moves may lead, we advice that you learn Interactive Deep Analysis (IDeA) which allows you to research a position in more detail by building an analysis tree with multiple variations and minimaxed evaluations.

For some special functionality, look here