Official NHA Assessment

Race 6: BETWAY PROGRESS PLATE (1,2 & 3 time winners)

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Line Horse
Princeofgreen
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
2 / 10
Within 2 points
Significant Diffs
5 / 10
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    Slinky Mapimpi       5    57.0    1    0.00     0.0   88    83           83    -5
2    Fatal Flaw           3    50.0    2    0.25     8.0   107   53           97    -10
3    Gimmeanotherchance   4    58.0    3    2.00     5.0   119   78           109   -10
4    Presley              4    61.0    4    6.25     5.0   98    81           88    -10
5    The Africa House     4    58.0    5    10.75    5.0   99    75           89    -10
6    Guy Gibson           2    58.0    6    11.50    0.0   105   85           95    -10
7    Rule By Force        3    58.0    7    13.00    8.0   105   69           95    -10
8    Daring Dash          2    56.0    8    20.25    0.0   98    81           88    -10
99   Princeofgreen        2    57.5    99   5.50     0.0   84    84           84    +0
99   Tail Of The Comet    4    60.5    99   0.00     5.0   -     80           80    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Slinky Mapimpi 88 101 83 +18 0.0 -
2 Fatal Flaw 107 118 97 +21 8.0 -
3 Gimmeanotherchance 119 96 109 -13 5.0 -
4 Presley 98 90 88 +2 5.0 -
5 The Africa House 99 93 89 +4 5.0 -
6 Guy Gibson 105 99 95 +4 0.0 -
7 Rule By Force 105 117 95 +22 8.0 -
8 Daring Dash 98 94 88 +6 0.0 -
99 Princeofgreen Line 84 87 84 +3 0.0
99 Tail Of The Comet - 79 80 -1 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