Sudoku ek standard 9x9 grid par khela jata hai, jisme 9 vertical columns, 9 horizontal rows, aur 9 chote 3x3 box (block) hote hain.
**Khel ka eklota niyam (Rule):** Grid ke har **Row**, har **Column**, aur har **3x3 Box** me 1 se 9 tak ke sare numbers bina repeat kiye aane chahiye.
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Direct Methods: Beginners ke liye 3 Aasan Tareeqe
### 1. Scanning (Nazar Ghumana)
Khel ki shuruaat hamesha **Scanning** se karein:
* Puri grid me wo number dhoondhein jo sabse zyada baar (jaise 4 ya 5 baar) pehle se likha hua hai.
* Agar kisi digit (jaise 7) ki teen alag-alag rows me se do rows bhari hui hain, toh tisri row me us 3x3 block ke andar 7 ki jagah turant mil jati hai.
### 2. Counting 1 to 9 (Ginti Ginna)
Jab kisi single Row, Column, ya 3x3 Box me sirf 1 ya 2 khali khane (cells) bache hon:
* Us Row ya Column ke sare bhare hue numbers ko 1 se 9 tak ginein.
* Jo number missing ho, usko khali jagah par bhar dein.
### 3. Cross-Hatching (Katai Karna)
Ek specific 3x3 box aur usse guzarne wali Horizontal aur Vertical lines par focus karein:
* Dekhein ki kaun-se numbers un lines me pehle se majood hain.
* Un numbers ko us 3x3 box ke saamne wale khali khanon se reject (cut) kar dein. Jahan sirf ek hi jagah bache, wahan sahi number bhar dein.
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Worked Example: Single Candidate Technique
Maan lijiye aap ek specific khali dabba (cell) bharna chahte hain:
| System | Majood Numbers | Matlab Is Khali Dabbe Me Kya Nahi Aa Sakta? |
|---|---|---|
| **Row me pehle se hain** | 1, 3, 5, 8 | 1, 3, 5, 8 cancel |
| **Column me pehle se hain** | 2, 4, 9 | 2, 4, 9 cancel |
| **3x3 Box me pehle se hai** | 7 | 7 cancel |
* **Bachne wala eklota digit:** **6**
* Toh us khali dabbe me sirf **6** hi aayega.
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Beginner Golden Rules (Ghaltiyon se Bachne ke Rules)
1. **Kabhi Tukka (Guess) Na Lagayein:** Sudoku puri tarah logic ka khel hai. Agar aap guess karenge, toh end me game phas jayega.
2. **Pencil ka Istemaal Karein:** Agar aap kagaz par khel rahe hain, toh khali khanon me chhote numbers (Pencil Marks/Candidates) note karein.
3. **Chhote Boxes (3x3) se Shuru Karein:** Pehle un 3x3 boxes ko target karein jisme pehle se 6, 7 ya 8 numbers bhare hue hain.