Official NHA Assessment

Race 7: ONLINE FORM GUIDE www.gallop.co.za CLASS 5 (Open. Benchmark at 60.0kg = 70)

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Line Horse
Purple Powahouse
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
0 / 11
Within 2 points
Significant Diffs
8 / 11
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Professor Lupin      4    54.0    1    0.00     9.0   58    40           40    -18
2    Bank Street          3    59.0    2    0.25     7.5   68    53           58    -10
3    Purple Powahouse     8    54.0    3    1.75     0.0   58    58           58    +0
4    Definitely Yes       2    58.5    4    1.90     5.0   67    57           57    -10
5    Indecent Proposal    4    57.0    5    3.10     9.0   64    46           54    -10
6    Quinn's Time         2    58.0    6    4.00     5.0   76    56           66    -10
7    Shimmering           2    55.0    7    4.50     5.0   78    50           68    -10
8    Double Olympic       4    53.0    8    5.70     9.0   56    38           46    -10
9    Pleasedtoseeyou      3    60.5    9    6.00     7.5   71    56           61    -10
10   Firelighter          3    58.5    10   9.70     7.5   67    52           57    -10
99   Moving In            4    62.0    99   0.00     9.0   -     56           56    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Professor Lupin 58 67 40 +27 9.0 -
2 Bank Street 68 67 58 +9 7.5 -
3 Purple Powahouse Line 58 55 58 -3 0.0
4 Definitely Yes 67 71 57 +14 5.0 -
5 Indecent Proposal 64 65 54 +11 9.0 -
6 Quinn's Time 76 71 66 +5 5.0 -
7 Shimmering 78 74 68 +6 5.0 -
8 Double Olympic 56 53 46 +7 9.0 -
9 Pleasedtoseeyou 71 65 61 +4 7.5 -
10 Firelighter 67 63 57 +6 7.5 -
99 Moving In - 66 56 +10 9.0 -
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