Official NHA Assessment

Race 4: GAUTENG GUINEAS DAY 1 FEBRUARY MIDDLE STAKES (For horses with nett rating of 105 and below)

Back to Race
Line Horse
The Africa House
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
7 / 9
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Truth                2    58.0    1    0.00     0.0   104   99           99    -5
2    The Africa House     4    56.0    2    1.40     2.5   93    93           93    +0
3    Calantha             4    52.0    3    2.10     2.5   87    85           85    -2
4    Richard The First    2    58.0    4    2.40     0.0   94    101          101   +7
5    Fire 'N Flames       4    60.0    5    3.90     2.5   101   99           99    -2
6    Tintamarre           3    50.0    6    4.20     4.0   84    76           76    -8
7    Cymric               3    56.0    7    9.10     4.0   101   87           91    -10
8    Star Coin            5    60.0    8    10.60    0.0   98    103          103   +5
99   The Playboy Bomber   4    52.0    99   0.00     2.5   -     82           82    +0
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Truth 104 120 99 +21 0.0 -
2 The Africa House Line 93 93 93 ✓ Match 2.5
3 Calantha 87 95 85 +10 2.5 -
4 Richard The First 94 87 101 -14 0.0 -
5 Fire 'N Flames 101 103 99 +4 2.5 -
6 Tintamarre 84 88 76 +12 4.0 -
7 Cymric 101 99 91 +8 4.0 -
8 Star Coin 98 78 103 -25 0.0 -
99 The Playboy Bomber - 88 82 +6 2.5 -
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