Official NHA Assessment

Race 8: HKJC WORLD POOL PREMIER'S CHAMPIONS CHALLENGE (Grade 1) (For all horses at Weight for Age)

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Line Horse
Atticus Finch
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
1 / 11
Within 2 points
Significant Diffs
8 / 11
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    Fire Attack          3    55.5    1    0.00     4.5   116   99           99    -17
2    Royal Victory        5    60.0    2    0.25     0.0   124   117          117   -7
3    Purple Pitcher       4    60.0    3    2.35     2.0   123   117          117   -6
4    Atticus Finch        5    60.0    4    2.65     0.0   121   121          121   +0
5    None Other           5    57.5    5    11.25    0.0   115   112          112   -3
6    Imilenzeyokududuma   6    60.0    6    11.65    0.0   114   117          117   +3
7    Chestnut Bomber      3    55.5    7    15.05    4.5   104   99           99    -5
8    Navajo Nation        4    60.0    8    17.75    2.0   102   113          113   +11
9    Son Of Raj           5    60.0    9    99.99    0.0   119   117          117   -2
99   Silver Sanctuary     4    57.5    99   0.00     2.0   -     108          108   +0
99   Hotarubi             4    60.0    99   0.00     2.0   -     113          113   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Fire Attack 116 124 99 +25 4.5 -
2 Royal Victory 124 124 117 +7 0.0 -
3 Purple Pitcher 123 121 117 +4 2.0 -
4 Atticus Finch Line 121 127 121 +6 0.0
5 None Other 115 115 112 +3 0.0 -
6 Imilenzeyokududuma 114 109 117 -8 0.0 -
7 Chestnut Bomber 104 90 99 -9 4.5 -
8 Navajo Nation 102 104 113 -9 2.0 -
9 Son Of Raj 119 116 117 -1 0.0 -
99 Silver Sanctuary - 117 108 +9 2.0 -
99 Hotarubi - 98 113 -15 2.0 -
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