Official NHA Assessment

Race 11: NEXT TURFFONTEIN RACEMEETING THURSDAY 23 FEBRUARY CLASSIFIED STAKES (For horses with nett rating of 75 and below)

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Line Horse
Admiralty Arch
Reference for assessment
Exact Matches
1 / 13
Calculated = Official
Close Matches
3 / 13
Within 2 points
Significant Diffs
5 / 13
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    Admiralty Arch       3    60.0    1    0.00     4.5   72    72           72    +0
2    Twice As Wild        6    50.5    2    2.75     0.0   50    62           62    +12
3    Cool Winter          2    60.0    3    6.00     3.0   81    75           75    -6
4    Giancarlo            2    52.0    4    7.25     3.0   48    59           59    +11
5    No Time is Taken     3    57.0    5    7.75     4.5   72    66           66    -6
6    Silver Clock         2    52.5    6    8.25     3.0   69    60           60    -9
7    Time Is Ticking      3    52.5    7    9.25     4.5   63    57           57    -6
8    Primula              2    50.0    8    10.25    3.0   67    55           57    -10
99   Power Ranger         7    52.0    99   0.00     0.0   -     65           65    +0
99   Silent War           3    60.0    99   0.00     4.5   -     72           72    +0
99   Written In Stone     9    53.5    99   0.00     0.0   -     68           68    +0
99   Lord Varys           4    60.0    99   0.00     5.0   -     71           71    +0
99   Ice Eater            6    56.0    99   0.00     0.0   -     73           73    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Admiralty Arch Line 72 77 72 +5 4.5
2 Twice As Wild 50 51 62 -11 0.0 -
3 Cool Winter 81 78 75 +3 3.0 -
4 Giancarlo 48 45 59 -14 3.0 -
5 No Time is Taken 72 65 66 -1 4.5 -
6 Silver Clock 69 67 60 +7 3.0 -
7 Time Is Ticking 63 60 57 +3 4.5 -
8 Primula 67 57 57 ✓ Match 3.0 -
99 Power Ranger - 69 65 +4 0.0 -
99 Silent War - 91 72 +19 4.5 -
99 Written In Stone - 67 68 -1 0.0 -
99 Lord Varys - 75 71 +4 5.0 -
99 Ice Eater - 57 73 -16 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