Official NHA Assessment

Race 5: FOR HOSPITALITY BOOKINGS CALL 011 681 1796 MIDDLE STAKES (For horses with nett rating of 105 and below)

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Line Horse
Twenty Drachma's
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
5 / 8
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    Battleground         5    54.0    1    0.00     0.0   88    106          94    +6
2    Good Council         2    57.5    2    3.60     0.0   99    115          115   +16
3    Twenty Drachma's     4    54.0    3    5.60     7.0   92    92           92    +0
4    Mambo Come Tesio     3    52.0    4    6.80     10.5  84    81           81    -3
5    Kadizora             4    50.0    5    9.20     7.0   78    84           84    +6
6    Nuclear Force        5    50.0    6    29.30    0.0   70    98           98    +28
99   Quantifier           2    47.5    99   10.80    0.0   78    93           78    +0
99   Sneak Preview        3    50.0    99   0.00     10.5  -     77           77    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Battleground 88 92 94 -2 0.0 -
2 Good Council 99 104 115 -11 0.0 -
3 Twenty Drachma's Line 92 83 92 -9 7.0
4 Mambo Come Tesio 84 80 81 -1 10.5 -
5 Kadizora 78 72 84 -12 7.0 -
6 Nuclear Force 70 61 98 -37 0.0 -
99 Quantifier 78 74 78 -4 0.0 -
99 Sneak Preview - 63 77 -14 10.5 -
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