Official NHA Assessment

Race 8: FOR HOSPITALITY BOOKINGS CALL 011 681 1796 MR 100 HANDICAP (Open)

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Line Horse
Jerusalema Rain
Reference for assessment
Exact Matches
2 / 11
Calculated = Official
Close Matches
9 / 11
Within 2 points
Significant Diffs
2 / 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    The Specialist       2    55.5    1    0.00     3.0   91    94           91    +0
2    Lead The Charge      2    54.0    2    0.50     3.0   88    91           91    +3
3    Jerusalema Rain      2    58.5    3    1.50     3.0   100   100          100   +0
4    Frozen Fantasy       3    58.5    4    2.00     4.5   97    97           97    +0
5    Palace Prince        2    59.5    5    3.00     3.0   105   102          102   -3
6    Halberdier           4    52.0    6    4.50     5.0   78    83           83    +5
7    Black Egret          3    54.5    7    10.00    4.5   92    89           89    -3
8    Slinky Mapimpi       5    60.5    8    10.60    0.0   101   110          110   +9
9    Rollwiththepunches   6    51.0    9    10.85    0.0   90    91           91    +1
99   Night Bomber         4    58.0    99   0.00     5.0   -     95           95    +0
99   Gimmethegoodlife     3    58.5    99   0.00     4.5   -     97           97    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 The Specialist 91 101 91 +10 3.0 -
2 Lead The Charge 88 89 91 -2 3.0 -
3 Jerusalema Rain Line 100 100 100 ✓ Match 3.0
4 Frozen Fantasy 97 98 97 +1 4.5 -
5 Palace Prince 105 103 102 +1 3.0 -
6 Halberdier 78 83 83 ✓ Match 5.0 -
7 Black Egret 92 90 89 +1 4.5 -
8 Slinky Mapimpi 101 101 110 -9 0.0 -
9 Rollwiththepunches 90 90 91 -1 0.0 -
99 Night Bomber - 96 95 +1 5.0 -
99 Gimmethegoodlife - 96 97 -1 4.5 -
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