Official NHA Assessment

Race 7: play.tabonline.co.za CAPE C STAKES (F & M) (For F & M 3-years & older with a nett rating of 74 & below)

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Line Horse
Island Treasure
Reference for assessment
Exact Matches
1 / 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    Perfect Trust        7    60.0    1    0.00     0.0   69    74           74    +5
2    Island Treasure      3    61.5    2    0.05     2.0   73    73           73    +0
3    Cloud Chaser         3    61.5    3    0.35     2.0   78    78           78    +0
4    Perilla              5    61.5    4    1.60     0.0   76    80           80    +4
5    Metar                3    61.5    5    2.00     2.0   73    76           76    +3
6    Venus De Milo        3    58.5    6    2.50     2.0   71    69           69    -2
7    Costa Smeralda       3    51.5    7    3.00     2.0   53    55           55    +2
8    Trip To Barberton    2    55.5    8    5.00     0.0   65    65           65    +0
9    Cruizin California   3    54.0    9    6.50     2.0   59    58           58    -1
10   The Agents Muse      2    58.5    10   12.75    0.0   71    71           71    +0
99   Official Secret      6    60.0    99   0.00     0.0   -     74           74    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Perfect Trust 69 50 74 -24 0.0 -
2 Island Treasure Line 73 73 73 ✓ Match 2.0
3 Cloud Chaser 78 68 78 -10 2.0 -
4 Perilla 76 89 80 +9 0.0 -
5 Metar 73 73 76 -3 2.0 -
6 Venus De Milo 71 64 69 -5 2.0 -
7 Costa Smeralda 53 53 55 -2 2.0 -
8 Trip To Barberton 65 64 65 -1 0.0 -
9 Cruizin California 59 50 58 -8 2.0 -
10 The Agents Muse 71 64 71 -7 0.0 -
99 Official Secret - 103 74 +29 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