 Recent scientific advances have not significantly changed that assessment . The game of checkers was solved in 2007 , but it has roughly the square root of the number of positions in chess . Jonathan Schaeffer , the scientist who led the effort , said a breakthrough such as quantum computing would be needed before solving chess could even be attempted , but he does not rule out the possibility , saying that the one thing he learned from his 16 @-@ year effort of solving checkers " is to never underestimate the advances in technology " . 
 Recent scientific advances <a href='been_done' title='1'><mark>have</mark></a> not significantly changed <a href='None' title='2'><mark>that</mark></a><a href='negative_concord' title='3'><mark>assessment</mark></a> . The game of checkers was solved in 2007 , but it <a href='got' title='4'><mark>has</mark></a> roughly the square root of the number of positions in chess . Jonathan Schaeffer , the scientist <a href='null_relcl' title='5'><mark>who</mark></a>led the effort , said a breakthrough such as quantum computing would be needed before solving chess could even be attempted , but he <a href='uninflect' title='6'><mark>does</mark></a> not rule out <a href='None' title='7'><mark>the</mark></a><a href='negative_concord' title='8'><mark>possibility</mark></a> , saying that the one thing he learned from his 16 @-@ year effort of solving checkers " is to never underestimate <a href='None' title='9'><mark>the</mark></a><a href='negative_concord' title='10'><mark>advances</mark></a> in technology " . 
Recent scientific advances done not significantly changed no assessment . The game of checkers was solved in 2007 , but it got roughly da square root of the number of positions in chess . Jonathan Schaeffer , the scientist led the effort , said a breakthrough such as quantum computing would be needed b4 solving chess could even be attempted , but he do not rule out no possibility , saying that tdaone thing he learned from his 16 @-@ year effort of solving checkers " is to never underestimate no advances in technology " .