Official NHA Assessment

Race 6: FOR HOSPITALITY BOOKINGS CALL 011 681 1796 MIDDLE STAKES (For All Horses)

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Line Horse
Plus Four
Reference for assessment
Exact Matches
1 / 6
Calculated = Official
Close Matches
3 / 6
Within 2 points
Significant Diffs
2 / 6
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    Rafa Bay             2    54.0    1    0.00     3.0   89    88           88    -1
2    Magic Tattoo         5    58.0    2    1.50     0.0   95    102          102   +7
3    Plus Four            2    54.0    3    2.50     3.0   88    88           88    +0
4    Mover And Shaker     5    60.0    4    2.75     0.0   109   106          106   -3
5    Twentytwentyvision   2    50.0    5    3.00     3.0   81    80           80    -1
6    Esquevelle           3    54.0    6    5.75     4.5   89    85           85    -4
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Rafa Bay 89 96 88 +8 3.0 -
2 Magic Tattoo 95 93 102 -9 0.0 -
3 Plus Four Line 88 87 88 -1 3.0
4 Mover And Shaker 109 109 106 +3 0.0 -
5 Twentytwentyvision 81 80 80 ✓ Match 3.0 -
6 Esquevelle 89 86 85 +1 4.5 -
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