Official NHA Assessment

Race 8: NEXT VAAL RACEMEETING THURSDAY 9 MAY MR 68 HANDICAP (Open)

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Line Horse
Della's Sword
Reference for assessment
Exact Matches
1 / 12
Calculated = Official
Close Matches
2 / 12
Within 2 points
Significant Diffs
8 / 12
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    Munchkin             5    62.0    1    0.00     0.0   72    77           72    +0
2    Pendragon            5    59.5    2    0.25     0.0   67    72           72    +5
3    Della's Sword        3    52.5    3    1.50     2.5   53    53           53    +0
4    Samoa                10   57.5    4    2.00     0.0   63    68           68    +5
5    Life Goes On         7    54.5    5    3.50     0.0   65    62           62    -3
6    Thymetoshine         5    57.0    6    3.75     0.0   62    67           67    +5
7    Dark Tide            5    54.5    7    4.75     0.0   57    62           62    +5
8    Herecomestherain     4    57.5    8    6.25     0.0   63    68           68    +5
9    Van Meijel           3    58.5    9    8.75     2.5   65    65           65    +0
10   Bridge Of Spies      6    52.5    10   8.80     0.0   53    58           58    +5
11   Knockemstiff         2    61.0    11   9.00     1.5   73    72           72    -1
99   Iron Sky             3    56.5    99   0.00     2.5   -     61           61    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Munchkin 72 65 72 -7 0.0 -
2 Pendragon 67 73 72 +1 0.0 -
3 Della's Sword Line 53 56 53 +3 2.5
4 Samoa 63 64 68 -4 0.0 -
5 Life Goes On 65 54 62 -8 0.0 -
6 Thymetoshine 62 51 67 -16 0.0 -
7 Dark Tide 57 53 62 -9 0.0 -
8 Herecomestherain 63 55 68 -13 0.0 -
9 Van Meijel 65 54 65 -11 2.5 -
10 Bridge Of Spies 53 48 58 -10 0.0 -
11 Knockemstiff 73 65 72 -7 1.5 -
99 Iron Sky - 61 61 ✓ Match 2.5 -
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