Number hit intervals is a statistical tool for analyzing 黑龙江体彩6+1 lottery that identifies patterns in the intervals between each number's appearances in draws.

This method is based on counting the number of draws between repeated occurrences of a specific ball. The interval analysis helps identify numbers that are 'due' to appear in upcoming draws.

Based on the last 20 draws for 黑龙江体彩6+1 lottery: Field # 1: ball 7 has been absent the longest (depth 12 draws), ball 3 appeared most recently (depth 0). Field # 2: ball 5 has been absent the longest (depth 14 draws), ball 7 appeared most recently (depth 0). Field # 3: ball 8 has been absent the longest (depth 19 draws), ball 9 appeared most recently (depth 0). Field # 4: ball 1 has been absent the longest (depth 15 draws), ball 4 appeared most recently (depth 0). Field # 5: ball 9 has been absent the longest (depth 19 draws), ball 7 appeared most recently (depth 0). Field # 6: ball 1 has been absent the longest (depth 14 draws), ball 0 appeared most recently (depth 0). Field # 7: ball 2 has been absent the longest (depth 18 draws), ball 8 appeared most recently (depth 0). Full interval table is shown below. Draws between hits →Karnauh method →