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You have to check your opponents King to win.

The grey Kazimdzhanov now appears in the list of the top-100 players in the World, not in the top-10, not in the top-20, but in position 54th. in the last ratings actualization, after being proclamed World Champion. Definitely, FIDE Champion is far from being considered as a real World Champion, and FIDE continues deteriorating the Federation image. Is the generalized opinion that only four players, except perhaps some new ascending players, have the power to be the authentic Champion: Kasparov, Krammnik, Anand and Leko, so a logic way to determine the Champion should be a Candidates Tournament to chose other four players and organize an all-around with the eight, selecting the top 2 to fight for the tittle.

This has been invented before: <p> From the <u>Encyclopedia of Chess Variants</u>: <p> <b>Check Chess</b> aka Presto Chess. Lawrence Crane (1916). <p> According to the entry the game was shown to be win for White with an opening of (1 Nc3). Various improvements were to move the Pawns to the 3rd/6th rank, require the checking piece be unattacked, and to limit the Queen to moving 1 or 2 squares; however, White seems to always have the advantage. Apparently Three-Check Chess works better.

Also see <a href='http://www.chessvariants.org/winning.dir/singleck.html'>http://www.chessvariants.org/winning.dir/singleck.html</a> for other check-is-mate variants.

It exits the variant in which you win if you put your own King in check?.

Another question, based on Peter Aronson's observation,'Apparently Three-Check Chess works better. ' : Has anyone tried Infinite Check Chess?

Infinite Check Chess has been done. See Exhausted King Chess.