Official NHA Assessment

Race 4: GULF RACING CLUB OPEN MAIDEN (For all Maidens)

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Line Horse
Groovejet
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
1 / 11
Within 2 points
Significant Diffs
7 / 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    Greenland            2    61.0    1    0.00     0.0   76    74           74    -2
2    Groovejet            4    61.0    2    2.25     0.5   76    76           76    +0
3    Sansa Stark          4    56.5    3    2.55     0.5   72    66           66    -6
4    Wehaveasituation     4    52.5    4    3.55     0.5   64    57           57    -7
5    Mela Strength        3    55.5    5    4.80     1.5   65    60           60    -5
6    Apache Chief         4    60.5    6    6.05     0.5   75    72           72    -3
7    Gripen               4    57.0    7    7.05     0.5   68    65           65    -3
8    Mo Yay               3    52.5    8    13.05    1.5   51    54           54    +3
9    Rogue Male           3    53.5    9    13.80    1.5   52    56           56    +4
10   Bryden Bay           2    52.5    10   13.80    0.0   57    57           57    +0
99   Black Cherry         2    60.0    99   0.00     0.0   -     72           72    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Greenland 76 71 74 -3 0.0 -
2 Groovejet Line 76 82 76 +6 0.5
3 Sansa Stark 72 63 66 -3 0.5 -
4 Wehaveasituation 64 73 57 +16 0.5 -
5 Mela Strength 65 63 60 +3 1.5 -
6 Apache Chief 75 74 72 +2 0.5 -
7 Gripen 68 58 65 -7 0.5 -
8 Mo Yay 51 48 54 -6 1.5 -
9 Rogue Male 52 50 56 -6 1.5 -
10 Bryden Bay 57 63 57 +6 0.0 -
99 Black Cherry - 66 72 -6 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