Official NHA Assessment

Race 7: 4RACING THANKS & APPRECIATES ZIETSMAN OOSTHUIZEN RACING STABLES CLASSIFIED STAKES (For horses with nett rating of 71 and

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Line Horse
Jaspero
Reference for assessment
Exact Matches
0 / 13
Calculated = Official
Close Matches
0 / 13
Within 2 points
Significant Diffs
7 / 13
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    Wind Sock            3    58.0    1    0.00     1.0   66    62           62    -4
2    Jaspero              4    60.0    2    1.25     0.5   71    71           71    +0
3    Grand Destiny        3    52.0    3    2.50     1.0   54    52           52    -2
4    Humble Tune          4    58.0    4    2.55     0.5   65    65           65    +0
5    Nkalanzinzi          3    50.0    5    3.30     1.0   50    47           47    -3
6    Clap Of Thunder      3    58.0    6    3.55     1.0   64    63           63    -1
7    Homer Fidget         4    56.0    7    4.05     0.5   60    60           60    +0
8    Storm Commander      5    58.0    8    5.55     0.0   65    64           64    -1
9    Duke Of Orange       3    58.0    9    6.80     1.0   66    62           62    -4
10   Euphoric             6    60.0    10   7.30     0.0   69    68           68    -1
11   Phantomoftheforest   3    58.0    11   11.55    1.0   64    62           62    -2
12   Dammi                2    60.0    12   17.80    0.0   73    68           68    -5
13   Law Court            3    58.0    13   20.05    1.0   68    62           62    -6
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Wind Sock 66 68 62 +6 1.0 -
2 Jaspero Line 71 76 71 +5 0.5
3 Grand Destiny 54 55 52 +3 1.0 -
4 Humble Tune 65 58 65 -7 0.5 -
5 Nkalanzinzi 50 50 47 +3 1.0 -
6 Clap Of Thunder 64 66 63 +3 1.0 -
7 Homer Fidget 60 55 60 -5 0.5 -
8 Storm Commander 65 74 64 +10 0.0 -
9 Duke Of Orange 66 53 62 -9 1.0 -
10 Euphoric 69 62 68 -6 0.0 -
11 Phantomoftheforest 64 50 62 -12 1.0 -
12 Dammi 73 55 68 -13 0.0 -
13 Law Court 68 65 62 +3 1.0 -
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