<prompt> Kasimdzhanov dǝ kam kǝn indimiye kam World Champion Viswanathan Ad dǝro, shi dǝga cidazǝna Ad-a kǝla kǝrawu-a kuru loktu kǝnasarǝnzǝ kǝla kǝnasarǝnzǝ World Chess Championship ye dǝn suro October 2008 lan Vladimir Kramnik-a, April-May 2010 lan Veselin Topalov-a suro May 2012 lan.  <response>: Boris Gelfand-a dǝro. 