Balance Model Tenhou Rank Statistics

Historical note: this article predates the 2026-07 model family rename. The Balance model is now called "RIGEL 1.4"; its weights and play style are unchanged, so the statistics still apply.

Data Source

• Account Source: 未払い, 秋野花, まだ垢, ハラヤハ (4 accounts)
• Data Query: https://nodocchi.moe/

Purpose

To better understand the true skill level of this AI model through actual performance analysis on the Tenhou platform.

Note: Zeus model data is not included due to insufficient sample size.

Account Statistics

Account 1: 未払い (Stopped on 2025-06-28)

• Rank: 9-dan
• Performance:
  • 1st: 133 games (30.9%)
  • 2nd: 106 games (24.6%)
  • 3rd: 106 games (24.6%)
  • 4th: 85 games (19.7%)
• Stable Rank: 430 games, Stable Tenhoui+0.1294 (Stable 11.12-dan)

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Account 2: 秋野花 (Stopped on 2025-06-20)

• Rank: 9-dan
• Performance:
  • 1st: 81 games (35.0%)
  • 2nd: 64 games (27.7%)
  • 3rd: 44 games (19.0%)
  • 4th: 42 games (18.1%)
• Stable Rank: 231 games, Stable Tenhoui+3.1429 (Stable 14.14-dan)

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Account 3: まだ垢 (Stopped on 2025-06-20)

• Rank: 9-dan
• Performance:
  • 1st: 208 games (28.7%)
  • 2nd: 204 games (28.1%)
  • 3rd: 151 games (20.8%)
  • 4th: 161 games (22.2%)
• Stable Rank: 724 games, Stable 9-dan+0.5528 (Stable 9.55-dan)

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Account 4: ハラヤハ (Stopped on 2025-05-17)

• Rank: 9-dan
• Performance:
  • 1st: 115 games (31.7%)
  • 2nd: 89 games (24.5%)
  • 3rd: 82 games (22.6%)
  • 4th: 76 games (20.9%)
• Stable Rank: 362 games, Stable 10-dan+0.5921 (Stable 10.59-dan)

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Overall Statistics

Item	Data
Total Houou Table Games	1,747
Overall Stable Rank	10.6-dan

Stable rank calculator: https://mahjong.org/tenhou-tool/point-calc.html

Conclusion

The data shows that the Balance model maintains a stable performance above 10-dan level on Tenhou's Houou table, demonstrating excellent four-player mahjong capabilities.