Official NHA Assessment

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Line Horse
Diamonds 'n Dust
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
6 / 9
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
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1    Space Race           4    55.5    1    0.00     4.0   65    65           65    +0
2    There She Goes       6    59.0    2    1.50     0.0   77    80           80    +3
3    Diamonds 'n Dust     4    58.5    3    2.00     4.0   71    71           71    +0
4    Star Choice          5    58.0    4    3.00     0.0   70    78           78    +8
5    Flashy Kaitrina      5    56.5    5    3.30     0.0   72    75           75    +3
6    Ethiopian Queen      3    59.5    6    3.80     3.5   78    74           74    -4
7    Bat Out Of Hell      4    60.5    7    5.10     4.0   75    75           75    +0
8    One Bite At A Time   3    57.5    8    8.80     3.5   74    70           70    -4
9    Rio's Kiss           3    55.5    9    11.00    3.5   73    66           66    -7
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Space Race 65 57 65 -8 4.0 -
2 There She Goes 77 77 80 -3 0.0 -
3 Diamonds 'n Dust Line 71 67 71 -4 4.0
4 Star Choice 70 77 78 -1 0.0 -
5 Flashy Kaitrina 72 82 75 +7 0.0 -
6 Ethiopian Queen 78 81 74 +7 3.5 -
7 Bat Out Of Hell 75 65 75 -10 4.0 -
8 One Bite At A Time 74 52 70 -18 3.5 -
9 Rio's Kiss 73 52 66 -14 3.5 -
Assessment Methodology
Calculation Steps:
  1. Identify Line Horse - consistent performer used as reference
  2. Calculate WFA Allowance based on age, distance, and month
  3. Apply Drag Adjustment for beaten margin
  4. Calculate Actual Weight Performance:
    Weight - Drag - WFA
  5. Compare to Line Horse to determine race rating
  6. Apply special rules (maiden caps, layoff allowance)
Key Formulas:
  • Drag Effect: Varies by distance (see Benchmarks page)
  • 1 length ≈ 1kg at 1 mile (1600m)
  • WFA Scale: Based on Admiral Rous's 1855 table
  • Rating Points: 1kg = 2 rating points