Official NHA Assessment

Race 7: MIKE DE KOCK IPI TOMBE CHALLENGE (Grade 2) (For Fillies and Mares at Weight For Age + Penalties)

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Line Horse
Let's Go Now
Reference for assessment
Exact Matches
3 / 8
Calculated = Official
Close Matches
4 / 8
Within 2 points
Significant Diffs
3 / 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    White Pearl          4    58.0    1    0.00     3.0   111   108          108   -3
2    Silver Sanctuary     4    60.0    2    0.30     3.0   116   117          117   +1
3    Let's Go Now         4    58.0    3    0.70     3.0   113   113          113   +0
4    Vj's Angel           3    54.0    4    0.95     6.0   119   98           109   -10
5    None Other           5    58.0    5    4.05     0.0   111   115          115   +4
6    Fiery Pegasus        3    52.0    6    5.05     6.0   107   90           97    -10
7    Key Element          4    58.0    7    6.30     3.0   101   108          108   +7
99   Sukhumvit            3    58.0    99   0.00     6.0   -     102          102   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 White Pearl 111 114 108 +6 3.0 -
2 Silver Sanctuary 116 117 117 ✓ Match 3.0 -
3 Let's Go Now Line 113 113 113 ✓ Match 3.0
4 Vj's Angel 119 114 109 +5 6.0 -
5 None Other 111 115 115 ✓ Match 0.0 -
6 Fiery Pegasus 107 119 97 +22 6.0 -
7 Key Element 101 92 108 -16 3.0 -
99 Sukhumvit - 100 102 -2 6.0 -
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