Official NHA Assessment

Race 5: DRAKENSTEIN STUD MR 84 HANDICAP (Open)

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Line Horse
Xenophon
Reference for assessment
Exact Matches
2 / 14
Calculated = Official
Close Matches
6 / 14
Within 2 points
Significant Diffs
3 / 14
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    Stoneywood           3    56.5    1    0.00     4.5   83    77           83    +0
2    African Prince       3    59.5    2    0.80     4.5   83    83           83    +0
3    Xenophon             3    59.5    3    1.90     4.5   83    83           83    +0
4    Blizzard Snow        3    58.0    4    2.70     4.5   88    80           80    -8
5    Rockaroundtheclock   2    57.5    5    2.95     3.0   85    82           82    -3
6    Romilly              2    57.0    6    3.05     3.0   84    81           81    -3
7    Ready Set Fire       2    54.0    7    3.55     3.0   72    75           75    +3
8    French Flame         2    59.0    8    4.15     3.0   82    85           85    +3
9    Sunset Warrior       2    52.5    9    4.40     3.0   75    72           72    -3
10   Kwagga Blitz         2    58.0    10   4.70     3.0   80    83           83    +3
11   Believe In Fate      2    59.0    11   6.00     3.0   85    85           85    +0
12   Arashi               2    61.0    12   12.00    3.0   92    89           89    -3
13   Blaze A Way          2    58.0    13   12.25    3.0   80    83           83    +3
99   Turbo Power          3    60.0    99   0.00     4.5   -     84           84    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Stoneywood 83 88 83 +5 4.5 -
2 African Prince 83 85 83 +2 4.5 -
3 Xenophon Line 83 83 83 ✓ Match 4.5
4 Blizzard Snow 88 86 80 +6 4.5 -
5 Rockaroundtheclock 85 83 82 +1 3.0 -
6 Romilly 84 87 81 +6 3.0 -
7 Ready Set Fire 72 69 75 -6 3.0 -
8 French Flame 82 82 85 -3 3.0 -
9 Sunset Warrior 75 76 72 +4 3.0 -
10 Kwagga Blitz 80 79 83 -4 3.0 -
11 Believe In Fate 85 85 85 ✓ Match 3.0 -
12 Arashi 92 90 89 +1 3.0 -
13 Blaze A Way 80 80 83 -3 3.0 -
99 Turbo Power - 83 84 -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