Official NHA Assessment

Race 8: NEXT VAAL RACEMEETING TUESDAY 5 MAY WORK RIDERS CLASSIFIED STAKES (For All Horses)

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Line Horse
Apostrophe
Reference for assessment
Exact Matches
2 / 9
Calculated = Official
Close Matches
6 / 9
Within 2 points
Significant Diffs
2 / 9
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    Sky Pillar Rock      3    61.5    1    0.00     2.0   81    80           80    -1
2    Space Mission        2    58.0    2    0.30     0.0   75    82           82    +7
3    Apostrophe           3    56.0    3    1.55     2.0   72    72           72    +0
4    The Mightiest        3    56.0    4    5.65     2.0   70    69           69    -1
5    Northern Kitten      3    55.0    5    5.70     2.0   67    67           67    +0
6    Sheets And Goggles   3    52.0    6    6.10     2.0   62    61           61    -1
7    Tracksuit Dave       3    60.0    7    7.60     2.0   76    77           77    +1
8    Pearl In Her Crown   2    58.5    8    7.90     0.0   72    78           78    +6
99   Blood Of Eden        2    56.0    99   0.00     0.0   -     73           73    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Sky Pillar Rock 81 85 80 +5 2.0 -
2 Space Mission 75 75 82 -7 0.0 -
3 Apostrophe Line 72 72 72 ✓ Match 2.0
4 The Mightiest 70 69 69 ✓ Match 2.0 -
5 Northern Kitten 67 66 67 -1 2.0 -
6 Sheets And Goggles 62 62 61 +1 2.0 -
7 Tracksuit Dave 76 76 77 -1 2.0 -
8 Pearl In Her Crown 72 72 78 -6 0.0 -
99 Blood Of Eden - 74 73 +1 0.0 -
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