Official NHA Assessment

Race 8: NEXT VAAL RACEMEETING THURSDAY 1 DECEMBER FM 69 HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Gilda Gray
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
3 / 11
Within 2 points
Significant Diffs
8 / 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    Strange Magic        5    58.5    1    0.00     0.0   80    78           80    +0
2    Queen Of Smoke       2    60.0    2    1.25     0.0   83    85           85    +2
3    Gilda Gray           3    57.0    3    2.75     7.0   63    63           63    +0
4    Nyali Beach          2    58.0    4    2.95     0.0   79    79           79    +0
5    Big City Girl        4    53.5    5    3.45     4.0   56    61           61    +5
6    Java House           4    52.5    6    3.95     4.0   54    59           59    +5
7    Eastern World        3    56.5    7    6.20     7.0   76    60           66    -10
8    Treaty               2    52.0    8    6.70     0.0   67    65           65    -2
9    Sacred Valley        3    55.5    9    6.90     7.0   60    58           58    -2
10   Song Of Angels       3    48.0    10   14.15    7.0   52    43           43    -9
11   Speechmaker          5    57.5    11   99.99    0.0   64    76           76    +12
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Strange Magic 80 69 80 -11 0.0 -
2 Queen Of Smoke 83 74 85 -11 0.0 -
3 Gilda Gray Line 63 64 63 +1 7.0
4 Nyali Beach 79 70 79 -9 0.0 -
5 Big City Girl 56 59 61 -2 4.0 -
6 Java House 54 52 59 -7 4.0 -
7 Eastern World 76 52 66 -14 7.0 -
8 Treaty 67 48 65 -17 0.0 -
9 Sacred Valley 60 44 58 -14 7.0 -
10 Song Of Angels 52 44 43 +1 7.0 -
11 Speechmaker 64 61 76 -15 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