Official NHA Assessment

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

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Line Horse
Bay Empire
Reference for assessment
Exact Matches
1 / 11
Calculated = Official
Close Matches
1 / 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  
------------------------------------------------------------------------------------------------------------------------
1    Michael Faraday      2    59.5    1    0.00     0.0   68    61           68    +0
2    Bay Empire           2    58.0    2    1.00     0.0   62    62           62    +0
3    Southampton          4    60.5    3    2.20     1.0   72    64           64    -8
4    King Bluetooth       2    52.0    4    2.60     0.0   53    48           48    -5
5    Kotinos              3    54.0    5    3.50     2.0   59    47           49    -10
6    Last Ginger          4    59.0    6    3.80     1.0   64    59           59    -5
7    Can't Catch Me       5    56.0    7    5.10     0.0   58    54           54    -4
8    Libeccio             5    58.0    8    6.30     0.0   62    58           58    -4
9    Sail The Sky         4    58.0    9    9.00     1.0   62    56           56    -6
10   Palace Guard         2    61.0    10   33.25    0.0   68    64           64    -4
99   Mocha Frappe         2    61.0    99   0.00     0.0   -     64           64    +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 71 68 +3 0.0 -
2 Bay Empire Line 62 62 62 ✓ Match 0.0
3 Southampton 72 71 64 +7 1.0 -
4 King Bluetooth 53 53 48 +5 0.0 -
5 Kotinos 59 57 49 +8 2.0 -
6 Last Ginger 64 62 59 +3 1.0 -
7 Can't Catch Me 58 57 54 +3 0.0 -
8 Libeccio 62 61 58 +3 0.0 -
9 Sail The Sky 62 60 56 +4 1.0 -
10 Palace Guard 68 68 64 +4 0.0 -
99 Mocha Frappe - 68 64 +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