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Shuffle Chess / Fischerandom / Chess960

Posted By: Nack Ballard
Date: Sunday, 9 December 2018, at 9:04 p.m.

In Response To: Reducing the draw percentage (Nack Ballard)

"Chess960" (which I suppose refers to one opening position chosen at random among 960) is basically Fischerandom, which is a refinement of Shuffle Chess, both of which I discussed in the previous post.

In a sample of 200,000 games among Chess engines, the draw percentage in Chess960 is 21%. This is a significant reduction from the 29% draw percentage of engine-vs-engine in standard Chess. Details.

I would conjecture the draw reduction for top-level human vs human to be even greater, not only because it starts at a much higher percentage (currently at 57% among 2600-rated players) but because of (the related reason of) the heavy reliance on opening preparation/memorization, which goes out the window with Chess 960. All of a sudden, blunders would appear in the openings again, increasing variance.

Nack

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