Official NHA Assessment

Race 3: GAUTENG GUINEAS DAY 4 FEBRUARY MAIDEN PLATE (For all Maidens. R15 000 Win bonus ROA Members)

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Line Horse
Full Go
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
3 / 11
Within 2 points
Significant Diffs
6 / 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    Gimme Royalty        3    60.0    1    0.00     5.0   56    51           51    -5
2    Quixote              2    60.0    2    0.25     3.5   77    54           67    -10
3    Full Go              6    60.0    3    1.50     0.0   61    61           61    +0
4    Phantomoftheforest   3    60.0    4    2.25     5.0   64    51           54    -10
5    Pembroke             3    60.0    5    2.75     5.0   -     51           51    +51
6    Exhale               3    60.0    6    7.00     5.0   -     51           51    +51
7    Mazatlan             3    57.5    7    10.00    5.0   -     46           46    +46
8    Incredible India     3    60.0    8    10.25    5.0   -     51           51    +51
99   Magic Link           3    60.0    99   0.00     5.0   -     51           51    +0
99   Smelting             7    57.5    99   0.00     0.0   -     56           56    +0
99   Free Movement        3    60.0    99   0.00     5.0   -     51           51    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Gimme Royalty 56 49 51 -2 5.0 -
2 Quixote 77 69 67 +2 3.5 -
3 Full Go Line 61 59 61 -2 0.0
4 Phantomoftheforest 64 50 54 -4 5.0 -
5 Pembroke - 79 51 +28 5.0 -
6 Exhale - 66 51 +15 5.0 -
7 Mazatlan - 58 46 +12 5.0 -
8 Incredible India - 64 51 +13 5.0 -
99 Magic Link - - 51 -51 5.0 -
99 Smelting - 52 56 -4 0.0 -
99 Free Movement - 81 51 +30 5.0 -
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