Official NHA Assessment

Race 4: #YOUCANBETONUS! MAIDEN PLATE (F & M) (For Maiden F & M)

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Line Horse
Blue Quartz
Reference for assessment
Exact Matches
1 / 13
Calculated = Official
Close Matches
2 / 13
Within 2 points
Significant Diffs
9 / 13
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Pretty Persuasive    2    56.0    1    0.00     0.0   -     55           6     +6
2    Tuscan Romance       3    60.0    2    2.50     1.5   77    62           67    -10
3    Vipingo              2    56.0    3    2.90     0.0   -     57           57    +57
4    Blue Quartz          4    60.0    4    5.40     0.5   62    62           62    +0
5    Golden Alexia        3    60.0    5    5.45     1.5   78    60           68    -10
6    Into Dancing         2    56.0    6    8.70     0.0   -     55           55    +55
7    Hopscotch            2    52.0    7    11.50    0.0   -     47           47    +47
8    Madame Pompadour     2    60.0    8    14.00    0.0   56    63           63    +7
9    Schipole             2    56.0    9    14.90    0.0   -     55           55    +55
10   Potato Salad         4    60.0    10   16.00    0.5   55    62           62    +7
11   Aftershock           3    60.0    11   20.00    1.5   57    60           60    +3
12   Betty Mo             2    60.0    12   38.25    0.0   66    63           63    -3
13   Brocken Spectre      3    60.0    13   99.99    1.5   -     60           60    +60
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Pretty Persuasive - 102 6 +96 0.0 -
2 Tuscan Romance 77 86 67 +19 1.5 -
3 Vipingo - - 57 - 0.0 -
4 Blue Quartz Line 62 62 62 ✓ Match 0.5
5 Golden Alexia 78 56 68 -12 1.5 -
6 Into Dancing - 85 55 +30 0.0 -
7 Hopscotch - 66 47 +19 0.0 -
8 Madame Pompadour 56 56 63 -7 0.0 -
9 Schipole - 78 55 +23 0.0 -
10 Potato Salad 55 47 62 -15 0.5 -
11 Aftershock 57 57 60 -3 1.5 -
12 Betty Mo 66 64 63 +1 0.0 -
13 Brocken Spectre - 13 60 -47 1.5 -
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