Official NHA Assessment

Race 4: CHARITY MILE 1 NOVEMBER MAIDEN PLATE (For all Maidens)

Back to Race
Line Horse
Bumps Last Grind
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
5 / 8
Within 2 points
Significant Diffs
3 / 8
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Bumps Last Grind     2    60.0    1    0.00     0.5   77    77           77    +0
2    Inspector James      3    60.0    2    1.25     1.5   76    75           75    -1
3    Summer Shade         4    60.0    3    3.15     2.0   58    74           74    +16
4    Willow Charm         2    57.0    4    3.75     0.5   -     71           71    +71
5    Jet Querari          3    56.0    5    3.80     1.5   73    67           67    -6
6    Ringho               4    60.0    6    3.90     2.0   63    74           74    +11
7    Down Town Cody       2    57.0    7    6.70     0.5   -     71           71    +71
8    Dragonheart          2    57.5    8    17.00    0.5   -     72           72    +72
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Bumps Last Grind Line 77 75 77 -2 0.5
2 Inspector James 76 73 75 -2 1.5 -
3 Summer Shade 58 52 74 -22 2.0 -
4 Willow Charm - 70 71 -1 0.5 -
5 Jet Querari 73 68 67 +1 1.5 -
6 Ringho 63 60 74 -14 2.0 -
7 Down Town Cody - 70 71 -1 0.5 -
8 Dragonheart - 46 72 -26 0.5 -
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