Official NHA Assessment

Race 5: LAWRENCE RILEY, DOUGLAS ROPER, GORDON STERLEY MR 66 HANDICAP (Open)

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Line Horse
Southampton
Reference for assessment
Exact Matches
2 / 11
Calculated = Official
Close Matches
3 / 11
Within 2 points
Significant Diffs
1 / 11
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Michael Faraday      2    59.5    1    0.00     0.0   68    69           68    +0
2    Bay Empire           2    58.0    2    1.00     0.0   62    70           70    +8
3    Southampton          4    60.5    3    2.20     1.0   72    72           72    +0
4    King Bluetooth       2    52.0    4    2.60     0.0   53    56           56    +3
5    Kotinos              3    54.0    5    3.50     2.0   59    55           55    -4
6    Last Ginger          4    59.0    6    3.80     1.0   64    67           67    +3
7    Can't Catch Me       5    56.0    7    5.10     0.0   58    62           62    +4
8    Libeccio             5    58.0    8    6.30     0.0   62    66           66    +4
9    Sail The Sky         4    58.0    9    9.00     1.0   62    64           64    +2
10   Palace Guard         2    61.0    10   33.25    0.0   68    72           72    +4
99   Mocha Frappe         2    61.0    99   0.00     0.0   -     72           72    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Michael Faraday 68 68 68 ✓ Match 0.0 -
2 Bay Empire 62 62 70 -8 0.0 -
3 Southampton Line 72 72 72 ✓ Match 1.0
4 King Bluetooth 53 53 56 -3 0.0 -
5 Kotinos 59 59 55 +4 2.0 -
6 Last Ginger 64 64 67 -3 1.0 -
7 Can't Catch Me 58 58 62 -4 0.0 -
8 Libeccio 62 62 66 -4 0.0 -
9 Sail The Sky 62 62 64 -2 1.0 -
10 Palace Guard 68 68 72 -4 0.0 -
99 Mocha Frappe - 68 72 -4 0.0 -
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