checking

The act of physically keeping an opposing player in check.

A checking account.

Withdraw $5000 from checking and put it into savings.

An act whereby one checks something or someone (in any sense).

The gin had a delayed reaction. Its effect didn't become felt until Valerie had, after a wearisome walk and numerous checkings of her map, reached the flat.

The crossing of solutions in a grid.

One must reckon to solve at least three of the Playfair clues independently before cracking the code and getting checking to help with solving the fourth.

What about the corpus of Ximenes - Azed specials? In 'Printer's Devilry' checking is normal but the clues are special.