Guān qí bù yǔ, zhēn jūnzǐ; luò zǐ wú huǐ, dàzhàngfu.

觀棋不語真君子, 落子無悔大丈夫。

Lit [One who while] watching a chess [game] keeps silent [is] a true gentleman; [one who] makes a move, [and does] not regret, [i.e., change] it [later, is a] good sportsman.

Note [Said, e.g., by chess players.]

Topics CHESS GENTLEMEN SPORT