Official NHA Assessment

Race 3: GRADUATION PLATE (Maidens,1 & 2 time winners)

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Line Horse
Lady Sanza
Reference for assessment
Exact Matches
0 / 6
Calculated = Official
Close Matches
0 / 6
Within 2 points
Significant Diffs
6 / 6
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    Days Gone By         3    54.0    1    0.00     1.0   55    60           60    +5
2    Cha Vez              3    57.0    2    2.50     1.0   55    68           68    +13
3    Lady Sanza           3    57.0    3    3.00     1.0   68    68           68    +0
4    Karoo Winter         4    54.5    4    5.50     0.5   58    62           62    +4
5    Pacific Duke         4    60.0    5    12.50    0.5   62    73           73    +11
6    Assume               3    57.0    6    13.00    1.0   58    66           66    +8
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Days Gone By 55 51 60 -9 1.0 -
2 Cha Vez 55 55 68 -13 1.0 -
3 Lady Sanza Line 68 58 68 -10 1.0
4 Karoo Winter 58 56 62 -6 0.5 -
5 Pacific Duke 62 49 73 -24 0.5 -
6 Assume 58 58 66 -8 1.0 -
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