To @ XePhaoMa tui đưa trước lời giải biến 3......X6-7 thiếu thì AE bổ xung nhé
3.X2/2 B7.1

1. X2.5 Tg4.1
2. X2/3 X6-7
3. X2/2 B7.1
4. X2-6 Tg4-5
5. X6-5 Tg5-4
6. S5/4 X7.1
7. X5.4 Tg4/1
8. X5/3

3.X2/2 X7.1

1. X2.5 Tg4.1
2. X2/3 X6-7
3. X2/2 X7.1
4. X2.4 Tg4/1
5. X2-5 B7.1
6. X5/3


1. X2.5 Tg4.1
2. X2/3 X6-7
3. X2/2 X7.1
4. X2.4 Tg4.1
5. X2-7 X7/2
6. X7-5

3.X2/2 Tg4/1

1. X2.5 Tg4.1
2. X2/3 X6-7
3. X2/2 Tg4/1
4. X2-5 X7.1
5. B3.1 Tg4.1
6. X5.1 X7-4
7. X5.1 X4-7
8. S5/4