Official NHA Assessment

Race 4: OPEN A TABGOLD ACCOUNT - 031 314 1874 MAIDEN PLATE (For all Maidens)

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Line Horse
Power Star
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
2 / 11
Within 2 points
Significant Diffs
8 / 11
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    Trusova              2    56.0    1    0.00     0.0   -     63           6     +6
2    Power Star           2    58.5    2    0.40     0.0   73    73           73    +0
3    Imaginable           3    60.0    3    2.10     1.5   -     71           71    +71
4    Reach Forthe Stars   5    60.0    4    4.40     0.0   68    71           71    +3
5    Flaming Drum         3    60.0    5    4.45     1.5   70    68           68    -2
6    Gijima Mfana         6    60.0    6    7.15     0.0   55    71           71    +16
7    Dance To The Music   3    60.0    7    7.30     1.5   -     68           68    +68
8    Thisiswhatitmeans    4    56.0    8    7.80     0.5   -     62           62    +62
9    Zin Zan Dan          2    54.5    9    12.00    0.0   -     60           60    +60
10   His Master's Voice   2    60.0    10   13.70    0.0   70    71           71    +1
99   Player X             2    56.0    99   0.00     0.0   -     63           63    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Trusova - 78 6 +72 0.0 -
2 Power Star Line 73 58 73 -15 0.0
3 Imaginable - 92 71 +21 1.5 -
4 Reach Forthe Stars 68 56 71 -15 0.0 -
5 Flaming Drum 70 50 68 -18 1.5 -
6 Gijima Mfana 55 50 71 -21 0.0 -
7 Dance To The Music - 61 68 -7 1.5 -
8 Thisiswhatitmeans - 106 62 +44 0.5 -
9 Zin Zan Dan - 64 60 +4 0.0 -
10 His Master's Voice 70 69 71 -2 0.0 -
99 Player X - 65 63 +2 0.0 -
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