"Y-윙" 기술은 "X-윙"과 비슷하지만, 셀을 네 개가 아니라 세 개만 사용합니다.
예시와 함께 이 기술에 대해 알아봅시다.
먼저, 메모가 두 개뿐인 셀을 찾습니다. 이러한 셀을 피봇이라 부릅니다.
그다음, 메모가 2개인 셀을 두 개 더 찾습니다. 이러한 셀을 핀서라고 하며, 피봇과 같은 행, 열, 또는 블록에 있어야 합니다. 각 핀서의 두 숫자 중 하나는 피봇의 숫자와 같아야 합니다. 두 핀서의 나머지 숫자 하나는 서로 같습니다.
이제 두 핀서가 교차하는 부분을 봅시다. 맨 아래 행에 있는 셀이겠군요. 이 셀에 두 핀서가 공유하는 메모가 있다면 지울 수 있습니다. 두 핀서에 4가 있으니, 여기서는 4가 되겠군요.
"Y-윙" 기술에 대해 알아보았습니다. 이 기술은 고급 스도쿠 전략입니다. 활용하려면 어느 정도 시간과 연습이 필요할 수 있습니다.
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