定石|じょうせきjouseki[0]heiban (flat)

1. nounstandard practice; playing by the book; established tactic; formula
   それは定石じょうせき通とおりというだけで、手てを抜ぬいたわけではないのです。↗

   That's just standard practise, it's not like they're cutting corners.
2. noun, gojoseki (jōseki); standard sequence of moves (esp. in a corner)

• Antonym変則へんそくWrittenIn written or formal prose, this means breaking with the rules or the norm — the opposite of 「定石」 as the accepted standard practice.
• Antonym新手あらてNeutralA neutral word for a new method or fresh move; in shogi, a novel move not covered by the 「定跡」. It stands opposite to the standard play of 「定石」.

「定石」 is the default for the accepted best sequence of moves in Go and, by extension, any standard, by-the-book practice, as in 「定石通り」; in shogi it is written 「定跡」. Use 「変則」 for what breaks with the norm and 「新手」 for a new move or method.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 囲碁いごにおいて最善さいぜんとされる一連いちれんの手順てじゅん。