Format
The main part of the tournament consists of seven rounds, each featuring a puzzle that all competitors solve. There are three rounds in the late morning and three in the early afternoon on Saturday, and the seventh round is on Sunday. Puzzles vary in size and difficulty from round to round. The puzzles are commissioned by Shortz from the top constructors in crosswords, with the fifth puzzle the hardest of the first six, and the sixth puzzle traditionally the work of veteran New York Magazine crossword constructor Maura B. Jacobson. The two three-round sessions consist of puzzles with 15, 17 and 19 squares in each row and column respectively. The Sunday puzzle is appropriately 21 x 21 squares, the size of regulation Sunday puzzles in newspapers. Tournament judges score the solved puzzles on accuracy and speed, and the puzzles are scanned and ranked.
After these seven rounds, the top three solvers in the top three divisions progress to the final round, which consists of solving a very difficult crossword of 15 × 15 size on an oversize grid on a stage at the front of the tournament room. The competitors in this round wear noise-blocking headphones so that a team of commentators can remark upon the action for the spectators. The solvers hold a sheet of clues and write their answers on the grid with a dry-erase marker for all to see. Accuracy and speed are important as the competitors are ranked by fewest mistakes, then time. The winner of this round is declared the tournament champion. The top three competitors in the B and C divisions also compete on the same puzzle, though with different sets of clues, for their division titles.
Read more about this topic: American Crossword Puzzle Tournament