Official NHA Assessment

Race 3: WWW.TAB4RACING.COM MAIDEN PLATE (For all Maidens. R15 000 Win bonus ROA Members)

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Line Horse
Great Barrier
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
0 / 11
Within 2 points
Significant Diffs
10 / 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    Great Barrier        4    57.5    1    0.00     5.0   73    73           73    +0
2    And Action           4    60.0    2    0.25     5.0   67    78           78    +11
3    Blue Quartz          4    57.5    3    1.50     5.0   -     73           73    +73
4    Trippis Tune         3    60.0    4    2.50     4.5   65    79           79    +14
5    Nkandla Gold         4    60.0    5    2.75     5.0   66    78           78    +12
6    High Queue           4    60.0    6    4.75     5.0   -     78           78    +78
7    Prized Platinum      3    60.0    7    5.75     4.5   75    79           79    +4
8    Toolegittoquit       3    57.5    8    8.00     4.5   -     74           74    +74
9    Silver Seven         3    56.0    9    16.00    4.5   -     71           71    +71
99   Trombettista         2    60.0    99   0.00     3.0   -     82           82    +0
99   Big Boy Bruce        2    60.0    99   0.00     3.0   -     82           82    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Great Barrier Line 73 60 73 -13 5.0
2 And Action 67 62 78 -16 5.0 -
3 Blue Quartz - 62 73 -11 5.0 -
4 Trippis Tune 65 70 79 -9 4.5 -
5 Nkandla Gold 66 63 78 -15 5.0 -
6 High Queue - 74 78 -4 5.0 -
7 Prized Platinum 75 72 79 -7 4.5 -
8 Toolegittoquit - 40 74 -34 4.5 -
9 Silver Seven - 38 71 -33 4.5 -
99 Trombettista - 63 82 -19 3.0 -
99 Big Boy Bruce - 76 82 -6 3.0 -
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