Official NHA Assessment

Race 10: BETWAY MR 80 HANDICAP (Open)

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Line Horse
Chieftain
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
0 / 7
Within 2 points
Significant Diffs
6 / 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    King Of Venus        4    60.5    1    0.00     9.0   81    88           81    +0
2    Chieftain            3    61.5    2    0.25     7.5   93    93           93    +0
3    Zanthar              3    53.0    3    1.00     7.5   84    76           76    -8
4    Arilena              6    54.0    4    2.25     0.0   72    93           93    +21
5    Gaelic Dancer        3    55.5    5    5.00     7.5   81    81           81    +0
6    Lovegrass            4    61.0    6    5.75     9.0   82    89           89    +7
7    Golden Chandelier    2    58.0    7    17.75    5.0   86    91           91    +5
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 King Of Venus 81 87 81 +6 9.0 -
2 Chieftain Line 93 106 93 +13 7.5
3 Zanthar 84 80 76 +4 7.5 -
4 Arilena 72 75 93 -18 0.0 -
5 Gaelic Dancer 81 64 81 -17 7.5 -
6 Lovegrass 82 96 89 +7 9.0 -
7 Golden Chandelier 86 82 91 -9 5.0 -
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