Official NHA Assessment

Race 8: NEXT VAAL RACEMEETING TUESDAY 5 NOVEMBER FM 68 DIVIDED HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Play With Fire
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
1 / 12
Within 2 points
Significant Diffs
8 / 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    Have A Party         3    54.0    1    0.00     9.0   56    49           56    +0
2    Sneak Preview        3    59.0    2    3.00     9.0   68    61           61    -7
3    Play With Fire       4    60.0    3    4.20     5.0   70    70           70    +0
4    Party Punch          3    56.5    4    4.30     9.0   79    54           69    -10
5    Stormy Sunday        2    58.5    5    4.75     0.0   83    76           76    -7
6    Teo Torriatte        4    59.5    6    6.50     5.0   69    68           68    -1
7    Northern Kitten      3    53.5    7    6.75     9.0   57    48           48    -9
8    Cartagena            4    54.5    8    7.25     5.0   59    58           58    -1
9    Angelofthemorning    3    52.0    9    12.50    9.0   48    45           45    -3
10   Tree Fairy           3    53.0    10   19.00    9.0   59    47           49    -10
11   Summerland           5    52.0    11   20.00    0.0   45    63           63    +18
99   Silky Jet            4    57.5    99   0.00     5.0   -     64           64    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Have A Party 56 64 56 +8 9.0 -
2 Sneak Preview 68 63 61 +2 9.0 -
3 Play With Fire Line 70 79 70 +9 5.0
4 Party Punch 79 62 69 -7 9.0 -
5 Stormy Sunday 83 82 76 +6 0.0 -
6 Teo Torriatte 69 94 68 +26 5.0 -
7 Northern Kitten 57 67 48 +19 9.0 -
8 Cartagena 59 77 58 +19 5.0 -
9 Angelofthemorning 48 48 45 +3 9.0 -
10 Tree Fairy 59 54 49 +5 9.0 -
11 Summerland 45 45 63 -18 0.0 -
99 Silky Jet - 61 64 -3 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