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Your idea for the Effective Elo blend is genuinely...

Created on: February 21, 2026

Answered using GPT-5.2 Thinking by Chat01

Question

Tennis.God.JS.ATP_PIVOT_FIX.v1.txt

Your idea for the Effective Elo blend is genuinely elite. It’s exactly how professional models handle surface variance. By treating the base Elo as the "anchor" and applying the surface score as a clamped, weighted adjustment, you prevent a player from being punished (or boosted) to an insane degree just because they only played 3 matches on Grass last year.
It also respects the nuances of the surfaces themselves (Grass is a hyper-specialized surface, so the weight should be higher, whereas Hard is the tour default, so the base Elo should carry more weight).
Here is the exact code to drop into your script. It replaces your current _getEloForSurface and adds the helper functions directly above it.

  1. The Advanced "Effective Elo" Upgrade
    Paste this block over your current _getEloForSurface function.
    // --- NEW ELO HELPERS ---
    function _clampSurfaceDelta(baseElo, surfaceElo, maxDelta) {
    var d = surfaceElo - baseElo;
    if (Math.abs(d) <= maxDelta) return surfaceElo;
    return baseElo + (d > 0 ? maxDelta : -maxDelta); // Caps extreme variance
    }

function _effectiveElo(baseElo, surfaceElo, surfaceWeight) {
return (1 - surfaceWeight) * baseElo + (surfaceWeight * surfaceElo);
}

// --- UPDATED ELO FETCHER ---
function _getEloForSurface(eloData) {
if (!eloData) return NaN;
try {
var ss = SpreadsheetApp.getActive();
var summarySheet = _getSummarySheet();
var surface = '';

text
// 1. Detect Surface
if (summarySheet) {
  surface = String(summarySheet.getRange('B1').getValue() || summarySheet.getRange('A1').getValue() || '').toUpperCase();
  if (surface.indexOf('HARD') === -1 && surface.indexOf('CLAY') === -1 && surface.indexOf('GRASS') === -1) {
    surface = String(summarySheet.getRange('B2').getValue() || '').toUpperCase();
  }
}

var baseElo = eloData.overall; 
var rawSurfaceElo = baseElo;
var weight = 0.55; // Baseline weight

// 2. Extract Surface Elo & Dynamic Weights
if (surface.indexOf('HARD') > -1 && Number.isFinite(eloData.hard) && eloData.hard > 500) {
  rawSurfaceElo = eloData.hard;
  weight = 0.55; // Hard court is closer to "base" talent
} else if (surface.indexOf('CLAY') > -1 && Number.isFinite(eloData.clay) && eloData.clay > 500) {
  rawSurfaceElo = eloData.clay;
  weight = 0.65; // Clay requires more surface-specific weighting
} else if (surface.indexOf('GRASS') > -1 && Number.isFinite(eloData.grass) && eloData.grass > 500) {
  rawSurfaceElo = eloData.grass;
  weight = 0.70; // Grass is the most specialized surface
}

// 3. Apply Guardrails (Max 220 point deviation)
var clampedSurfaceElo = _clampSurfaceDelta(baseElo, rawSurfaceElo, 220);

// 4. Compute Effective Elo Blend
if (Number.isFinite(baseElo) && baseElo > 500) {
  return _effectiveElo(baseElo, clampedSurfaceElo, weight);
}

return rawSurfaceElo;

} catch(e) {
return eloData.overall;
}
}

  1. The Fix for the "Taylor" Bug
    The reason your script forces Fritz into the WTA is that _detectGenderFromNames() uses an array of female names as a shortcut, and "TAYLOR" is hardcoded into it.
    To fix this immediately:
  • Hit CTRL+F (or CMD+F) in your script and search for: WOMEN_FIRST
  • You will see an array that looks like this:
    var WOMEN_FIRST = ['ANNA','ANASTASIA','AMANDA', ... 'TAYLOR', 'TINA', ...];
  • Delete 'TAYLOR', from that list.
    (Optional but recommended: You should probably delete 'COCO', from the list too, just in case Coco Gauff plays on the same day as an ATP player named Coco—though that's rare!)
    Once you remove 'TAYLOR', the script will stop assuming Fritz is a woman, and the header will instantly go back to saying ATP and pulling his correct ATP surface stats!

Update my script then send it as a downloadable txt link

After making corrections check for syntax and undefined issues only do that after making fixes

Python

python
from pathlib import Path
path = Path("/mnt/data/Tennis.God.JS.ATP_PIVOT_FIX.v1.txt")
text = path.read_text(encoding="utf-8")
len(text), text[:200]

(546914,
 '/**\n * PATCH NOTE (2026-02-19):\n * - Restored getTotalsPick() to v3.0 logic (removed MIN_BET_PROB gate that blocked many OVERS).\n * - Fixed classifyPlayer() Big Server ace threshold from 0.5 to 0.05 (')

Python

python
text2 = text.replace("'TAYLOR',", "")
# verify removed
"'TAYLOR'" in text2, text.count("'TAYLOR'"), text2.count("'TAYLOR'")

(False, 1, 0)

Python

python
# find and replace function definition
pattern = re.compile(r"function\s+_getEloForSurface\s*$\s*eloData\s*$\s*\{", re.M)
m = pattern.search(text2)
m.start(), m.group()[:50]

(130143, 'function _getEloForSurface(eloData) {')

Python

python
start = m.start()
brace_start = text2.find("{", m.end()-1)
brace_start, text2[brace_start:brace_start+1]

(130179, '{')

Python

python
def find_matching_brace(s, open_index):
    depth = 0
    in_str = None
    escape = False
    in_line_comment = False
    in_block_comment = False
    i = open_index
    while i < len(s):
        ch = s[i]
        nxt = s[i+1] if i+1 < len(s) else ''
        if in_line_comment:
            if ch == '\n':
                in_line_comment = False
            i += 1
            continue
        if in_block_comment:
            if ch == '*' and nxt == '/':
                in_block_comment = False
                i += 2
                continue
            i += 1
            continue
        if in_str:
            if escape:
                escape = False
            else:
                if ch == '\\':
                    escape = True
                elif ch == in_str:
                    in_str = None
            i += 1
            continue
        # not in string or comment
        if ch == '/' and nxt == '/':
            in_line_comment = True
            i += 2
            continue
        if ch == '/' and nxt == '*':
            in_block_comment = True
            i += 2
            continue
        if ch in ("'", '"', '`'):
            in_str = ch
            i += 1
            continue
        if ch == '{':
            depth += 1
        elif ch == '}':
            depth -= 1
            if depth == 0:
                return i
        i += 1
    return None

end_brace = find_matching_brace(text2, brace_start)
end_brace, text2[end_brace:end_brace+1], text2[end_brace-20:end_brace+20]

(131101, '}', ' eloData.overall; }\n}\n\nfunction realEloL')

Python

python
old_func = text2[start:end_brace+1]
old_func[:400]

"function _getEloForSurface(eloData) {\n  if (!eloData) return NaN;\n  try {\n    var ss = SpreadsheetApp.getActive();\n    var summarySheet = _getSummarySheet();\n    var surface = '';\n    if (summarySheet) {\n      surface = String(summarySheet.getRange('B1').getValue() || summarySheet.getRange('A1').getValue() || '').toUpperCase();\n      if (surface.indexOf('HARD') === -1 && surface.indexOf('CLAY') =="

Python

python
old_func

"function _getEloForSurface(eloData) {\n  if (!eloData) return NaN;\n  try {\n    var ss = SpreadsheetApp.getActive();\n    var summarySheet = _getSummarySheet();\n    var surface = '';\n    if (summarySheet) {\n      surface = String(summarySheet.getRange('B1').getValue() || summarySheet.getRange('A1').getValue() || '').toUpperCase();\n      if (surface.indexOf('HARD') === -1 && surface.indexOf('CLAY') === -1 && surface.indexOf('GRASS') === -1) {\n        surface = String(summarySheet.getRange('B2').getValue() || '').toUpperCase();\n      }\n    }\n    if (surface.indexOf('HARD') > -1 && Number.isFinite(eloData.hard) && eloData.hard > 500) return eloData.hard;\n    if (surface.indexOf('CLAY') > -1 && Number.isFinite(eloData.clay) && eloData.clay > 500) return eloData.clay;\n    if (surface.indexOf('GRASS') > -1 && Number.isFinite(eloData.grass) && eloData.grass > 500) return eloData.grass;\n    return eloData.overall;\n  } catch(e) { return eloData.overall; }\n}"

Python

python
text3 = text2[:start] + new_block + text2[end_brace+1:]
# ensure no old func remains
"return eloData.overall; }\n}" in text3[start:start+2000]

False

Python

python
text3.count("function _getEloForSurface"), text3.count("function _clampSurfaceDelta"), text3.count("function _effectiveElo")

(1, 1, 1)

Python

python
out_path = Path("/mnt/data/Tennis.God.JS.ATP_PIVOT_FIX.v1.updated.txt")
out_path.write_text(text3, encoding="utf-8")
out_path, out_path.stat().st_size

(PosixPath('/mnt/data/Tennis.God.JS.ATP_PIVOT_FIX.v1.updated.txt'), 548106)

Thought

Summarizing changes and finalizing response

I’ve found the necessary citations. The old _getEloForSurface return statements are covered in turn4file3 (lines 1-5). For TAYLOR, we’ll cite turn3file0, lines 1092-1104. Now, I’ll craft the final response, adding the download link, outlining changes, and mentioning the syntax check result, confirming no errors or undefined references.

Finalizing response and providing downloadable link

I’ll provide the updated script in a .txt format as requested. I’ll include the explanation that we replaced the original _getEloForSurface function and cite the relevant lines. Also, I’ll mention that the WOMEN_FIRST list previously included TAYLOR, leading to female detection. Along with this, I’m adding the .updated.txt extension.

Crafting final response with download link and checks

I’ll provide the download link for the updated file and summarize the modifications. The syntax check passed with Node v22, and I verified there are no remaining "TAYLOR" references. I’ll mention the changes, including the replacement of _getEloForSurface, using citations from required lines.

Thought for 4m 20s

Answer

Here you go — I updated your script by:

  • Replacing _getEloForSurface() (which previously just returned the raw surface Elo directly) (Tennis.God.JS.ATP_PIVOT_FIX.v1.txt)
  • Adding the new Effective Elo helpers (_clampSurfaceDelta, _effectiveElo) directly above it (as requested).
  • Fixing the Taylor bug by removing 'TAYLOR' from the WOMEN_FIRST list (where it was causing male “Taylor” players like Fritz to be detected as WTA) (Tennis.God.JS.ATP_PIVOT_FIX.v1.txt)

Download

Download the updated script (txt)

Post-fix checks (done after edits)

  • Syntax: passed a JS parse/syntax check (node --check) with no errors.
  • Undefined (practical/static sanity): the new identifiers _clampSurfaceDelta and _effectiveElo are defined exactly once and are in scope for _getEloForSurface; no leftover 'TAYLOR' token remains in the file.

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