Official NHA Assessment

Race 4: RACEHORSE OWNERS ASSOCIATION MR 93 HANDICAP (Open)

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Line Horse
Jacob's Ladder
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
1 / 7
Within 2 points
Significant Diffs
5 / 7
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    Zig Zag              5    53.5    1    0.00     0.0   80    81           80    +0
2    Mhlabeni             7    60.0    2    1.25     0.0   93    100          100   +7
3    Jacob's Ladder       4    57.5    3    3.50     2.0   88    88           88    +0
4    You Know Who         3    59.0    4    5.50     4.5   91    83           83    -8
5    King's Crusade       4    54.0    5    6.25     2.0   81    78           78    -3
6    Assured              4    53.5    6    8.25     2.0   79    77           77    -2
7    Ablueazure           3    52.0    7    8.50     4.5   77    69           69    -8
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Zig Zag 80 87 80 +7 0.0 -
2 Mhlabeni 93 90 100 -10 0.0 -
3 Jacob's Ladder Line 88 73 88 -15 2.0
4 You Know Who 91 91 83 +8 4.5 -
5 King's Crusade 81 81 78 +3 2.0 -
6 Assured 79 76 77 -1 2.0 -
7 Ablueazure 77 76 69 +7 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