Official NHA Assessment

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

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Line Horse
Wonderworld
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
1 / 12
Within 2 points
Significant Diffs
7 / 12
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    Prime Example        2    58.0    1    0.00     0.0   70    66           66    -4
2    Broadlands           3    54.5    2    2.00     6.0   73    52           63    -10
3    Queen Britanna       2    54.5    3    2.25     0.0   67    64           64    -3
4    Wonderworld          2    58.0    4    2.75     0.0   69    69           69    +0
5    Puerto Plata (ARG)   3    58.0    5    4.75     6.0   73    54           63    -10
6    Fast Duty            3    58.0    6    6.00     6.0   75    54           65    -10
7    Big Five             3    60.0    7    6.25     6.0   56    58           58    +2
8    Turnthebeataround    3    54.5    8    9.00     6.0   -     47           47    +47
9    Street's Ahead       2    54.5    9    21.00    0.0   58    59           59    +1
10   What Say You         2    58.0    10   26.00    0.0   72    66           66    -6
11   Hephaestus           3    58.0    11   99.99    6.0   10    54           54    +44
99   War Medal            3    58.0    99   0.00     6.0   -     54           54    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Prime Example 70 93 66 +27 0.0 -
2 Broadlands 73 69 63 +6 6.0 -
3 Queen Britanna 67 57 64 -7 0.0 -
4 Wonderworld Line 69 64 69 -5 0.0
5 Puerto Plata (ARG) 73 68 63 +5 6.0 -
6 Fast Duty 75 67 65 +2 6.0 -
7 Big Five 56 53 58 -5 6.0 -
8 Turnthebeataround - 64 47 +17 6.0 -
9 Street's Ahead 58 55 59 -4 0.0 -
10 What Say You 72 72 66 +6 0.0 -
11 Hephaestus 10 10 54 -44 6.0 -
99 War Medal - 67 54 +13 6.0 -
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