Official NHA Assessment

Race 8: NEXT VAAL RACEMEETING TUESDAY 16 MAY MR 75 HANDICAP (Open)

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Line Horse
Letsdoit
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
1 / 11
Within 2 points
Significant Diffs
6 / 11
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    Cosmic Star          3    60.0    1    0.00     2.5   78    75           78    +0
2    Letsdoit             3    60.0    2    4.25     2.5   75    75           75    +0
3    Mescal               2    58.5    3    4.75     1.5   75    74           74    -1
4    Suryavarman          2    60.0    4    5.50     1.5   78    77           77    -1
5    Laetitia's Angel     4    61.5    5    6.00     0.0   78    83           83    +5
6    Power Ranger         7    52.5    6    6.10     0.0   60    65           65    +5
7    Defender Of Rights   3    58.0    7    7.50     2.5   71    71           71    +0
8    San Marzano          3    59.0    8    8.25     2.5   76    73           73    -3
9    Ballon D'or          5    53.0    9    9.00     0.0   66    66           66    +0
10   Fort Lauderdale      2    58.0    10   11.00    1.5   74    73           73    -1
11   Corapi               3    56.5    11   12.25    2.5   68    68           68    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Cosmic Star 78 105 78 +27 2.5 -
2 Letsdoit Line 75 72 75 -3 2.5
3 Mescal 75 64 74 -10 1.5 -
4 Suryavarman 78 84 77 +7 1.5 -
5 Laetitia's Angel 78 77 83 -6 0.0 -
6 Power Ranger 60 69 65 +4 0.0 -
7 Defender Of Rights 71 67 71 -4 2.5 -
8 San Marzano 76 53 73 -20 2.5 -
9 Ballon D'or 66 61 66 -5 0.0 -
10 Fort Lauderdale 74 85 73 +12 1.5 -
11 Corapi 68 67 68 -1 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