ការลดบรรทัดกล่อง (Box line reduction)
เทคนิคการลดบรรทัดกล่อง (Box Line Reduction) เป็นกลยุทธ์ขั้นสูงที่ใช้เมื่อตำแหน่งที่เป็นไปได้ของตัวเลขในแถวหรือคอลัมน์อยู่ภายในภูมิภาคหรือกล่องเดียวทั้งหมด។
ពេលណាគួរប្រើ
ប្រើនៅពេលលេខសាកល្បងទាំងអស់នៃលេខមួយក្នុងប្រអប់ស្ថិតនៅលើជួរដេក ឬជួរឈរតែមួយ។
ឧទាហរណ៍ដែលបានដោះស្រាយ
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ក្នុងប្រអប់ រាល់លេខសាកល្បងសម្រាប់លេខ 3 ស្ថិតនៅលើជួរដេកតែមួយ។
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ដូច្នេះលេខ 3 ត្រូវបានលុបចេញពីផ្នែកដែលនៅសល់នៃជួរដេកនោះនៅខាងក្រៅប្រអប់។
ក្នុងការអនុវត្ត
ตัวอย่างเช่น, หากในกล่องด้านบน, ตัวเลข 4 สามารถปรากฏได้เฉพาะในเซลล์ที่เป็นส่วนหนึ่งของแถวที่ 2, คุณสามารถลบ 4 เป็นความเป็นไปได้ในเซลล์อื่นของกล่องนั้นได้។ បច្ចេកទេសនេះធ្វើអោយប្រសើរឡើងនូវប្រសិទ្ធភាពនៅពេលដោះស្រាយ Sudoku ស្មុគស្មាញ។
កំហុសទូទៅ
- ការច្រឡំទិសដៅ៖ ការលុបកើតឡើងតាមបណ្តោយបន្ទាត់ នៅខាងក្រៅប្រអប់ មិនមែននៅខាងក្នុងវាទេ។
- ការអនុវត្តវានៅពេលលេខសាកល្បងលាតសន្ធឹងលើជួរដេក ឬជួរឈរពីរ — វាដំណើរការតែនៅពេលពួកវាស្ថិតនៅលើបន្ទាត់តែមួយ។
សំណួរញឹកញាប់
តើ pointing pair ដូចគ្នានឹង box/line reduction ដែរឬទេ?
ពួកវាជាផ្នែកពីរនៃគំនិតតែមួយ៖ pointing pair លុបតាមបណ្តោយបន្ទាត់ចេញពីប្រអប់ ឯ box/line reduction លុបក្នុងប្រអប់ចេញពីបន្ទាត់។