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missing_balance

missing_balance-2026300003

The opening balance is gone: the answer is uncomputable.

expects missing_balance

Statement files

These files are the untouched baseline for seed 2026300003.

bnp_camt053.xmlUntouched by this perturbation
<?xml version='1.0' encoding='utf-8'?>
<Document xmlns="urn:iso:std:iso:20022:tech:xsd:camt.053.001.02">
<BkToCstmrStmt>
<GrpHdr>
<MsgId>LB-acct-2026300003-2-2025-12-31</MsgId>
<CreDtTm>2025-12-31T23:59:00+00:00</CreDtTm>
</GrpHdr>
<Stmt>
<Id>acct-2026300003-2</Id>
<ElctrncSeqNb>1</ElctrncSeqNb>
<CreDtTm>2025-12-31T23:59:00+00:00</CreDtTm>
<FrToDt>
<FrDtTm>2025-12-01T00:00:00+00:00</FrDtTm>
<ToDtTm>2025-12-31T23:59:59+00:00</ToDtTm>
</FrToDt>
<Acct>
<Id>
<IBAN>GB64LBEN10204841224278</IBAN>
</Id>
<Ccy>GBP</Ccy>
</Acct>
<Bal>
<Tp>
<CdOrPrtry>
<Cd>OPBD</Cd>
</CdOrPrtry>
</Tp>
<Amt Ccy="GBP">59654.12</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Dt>
<Dt>2025-12-01</Dt>
</Dt>
</Bal>
<Ntry>
<Amt Ccy="GBP">3065.75</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-12-03</Dt>
</BookgDt>
<ValDt>
<Dt>2025-12-03</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300003-2-t012</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>TFR NORTHGATE CLEANING REF249560</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">6081.49</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-12-04</Dt>
</BookgDt>
<ValDt>
<Dt>2025-12-04</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300003-2-t016</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>CR HARBOURLIGHT IT REF668734</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">11098.49</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-12-04</Dt>
</BookgDt>
<ValDt>
<Dt>2025-12-04</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300003-2-t017</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>DD GREENHOLM FOODS REF667956</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">9774.80</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-12-05</Dt>
</BookgDt>
<ValDt>
<Dt>2025-12-05</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300003-2-t027</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPO BRAMBLE LOGISTICS REF466681</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">6076.76</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-12-05</Dt>
</BookgDt>
<ValDt>
<Dt>2025-12-05</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300003-2-t028</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPO FENWICK &amp; PARTNERS REF313885</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">5896.32</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-12-06</Dt>
</BookgDt>
<ValDt>
<Dt>2025-12-06</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300003-2-t015</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP DELPHINIUM MEDIA REF615029</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">1467.09</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-12-06</Dt>
</BookgDt>
<ValDt>
<Dt>2025-12-06</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300003-2-t030</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPI OSPREY LEASING REF708742</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">11295.95</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-12-07</Dt>
</BookgDt>
<ValDt>
<Dt>2025-12-07</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300003-2-t023</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>CR KESTREL INSURANCE REF680488</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">14127.05</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-12-08</Dt>
</BookgDt>
<ValDt>
<Dt>2025-12-08</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300003-2-t024</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPO LARKSPUR TRAVEL REF810162</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">9107.13</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-12-09</Dt>
</BookgDt>
<ValDt>
<Dt>2025-12-09</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300003-2-t004</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>SO FENWICK &amp; PARTNERS REF994626</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">4579.44</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-12-09</Dt>
</BookgDt>
<ValDt>
<Dt>2025-12-09</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300003-2-t009</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>DD NORTHGATE CLEANING REF400431</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">5420.55</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-12-12</Dt>
</BookgDt>
<ValDt>
<Dt>2025-12-12</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300003-2-t001</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>CR GREENHOLM FOODS REF675871</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">11401.80</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-12-12</Dt>
</BookgDt>
<ValDt>
<Dt>2025-12-12</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300003-2-t026</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP IRONBRIDGE TOOLING REF940691</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">12553.47</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-12-13</Dt>
</BookgDt>
<ValDt>
<Dt>2025-12-13</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300003-2-t021</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPI GREENHOLM FOODS REF511234</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">13481.29</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-12-13</Dt>
</BookgDt>
<ValDt>
<Dt>2025-12-13</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300003-2-t022</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP KESTREL INSURANCE REF469210</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">9654.07</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-12-13</Dt>
</BookgDt>
<ValDt>
<Dt>2025-12-13</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300003-2-t025</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPO FENWICK &amp; PARTNERS REF823265</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">12674.29</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-12-14</Dt>
</BookgDt>
<ValDt>
<Dt>2025-12-14</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300003-2-t003</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>CR MOORLAND TELECOM REF256727</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">11174.54</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-12-14</Dt>
</BookgDt>
<ValDt>
<Dt>2025-12-14</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300003-2-t010</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP OSPREY LEASING REF540106</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">2108.14</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-12-14</Dt>
</BookgDt>
<ValDt>
<Dt>2025-12-14</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300003-2-t020</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP DELPHINIUM MEDIA REF455916</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">8497.53</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-12-16</Dt>
hsbc_statement.xlsxUntouched by this perturbation
[sheet: Statement]
HSBC Bank plc
Business Current Account Statement
Account name: LEDGERBENCH DEMO LTD
Sort code / Account number: 76-81-61 39685817
Account reference: acct-2026300003-1
Statement period: 01 Dec 2025 to 31 Dec 2025
Currency: GBP
Date Payment type Details Paid out Paid in
04 Dec 2025 FPI KESTREL INSURANCE REF344995 7962.63
05 Dec 2025 FPO JUNIPER PAYROLL REF992845 2972.63
07 Dec 2025 FPO MOORLAND TELECOM REF918194 6137.72
10 Dec 2025 DD GREENHOLM FOODS REF225563 14529.63
12 Dec 2025 BP GREENHOLM FOODS REF604082 4247.55
13 Dec 2025 SO LARKSPUR TRAVEL REF151774 9987.18
13 Dec 2025 BP IRONBRIDGE TOOLING REF803232 2518.53
17 Dec 2025 SO BRAMBLE LOGISTICS REF184539 5954.59
18 Dec 2025 SO KESTREL INSURANCE REF726434 14290.11
20 Dec 2025 DD HARBOURLIGHT IT REF915197 1739.52
23 Dec 2025 CR BRAMBLE LOGISTICS REF616773 4326.48
23 Dec 2025 DD OSPREY LEASING REF724242 3454.70
25 Dec 2025 TFR FENWICK & PARTNERS REF709934 13188.16
25 Dec 2025 BP HARBOURLIGHT IT REF447176 5007.85
26 Dec 2025 BP LARKSPUR TRAVEL REF506477 10903.99
26 Dec 2025 DD NORTHGATE CLEANING REF133249 917.71
27 Dec 2025 TFR OSPREY LEASING REF577487 11327.06
27 Dec 2025 FPI EASTFIELD ENERGY REF136409 1145.52
28 Dec 2025 TFR BRAMBLE LOGISTICS REF542760 8674.12
28 Dec 2025 TFR DELPHINIUM MEDIA REF704584 13341.80
28 Dec 2025 DD OSPREY LEASING REF860963 10751.56
30 Dec 2025 BP JUNIPER PAYROLL REF602095 3547.73
30 Dec 2025 TFR FENWICK & PARTNERS REF453857 9172.16
rbs_transactions.csvUntouched by this perturbation
"Date","Type","Description","Value","Account Name","Account Number","Ledger Ref"
"01/12/2025","BAL","OPENING BALANCE","211035.07","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"01/12/2025","TFR","TFR HARBOURLIGHT IT REF358476","6832.13","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"02/12/2025","BP","BP BRAMBLE LOGISTICS REF366388","-8775.37","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"02/12/2025","DD","DD BRAMBLE LOGISTICS REF437105","-9008.70","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"04/12/2025","FPO","FPO KESTREL INSURANCE REF894306","-13535.28","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"04/12/2025","CR","CR JUNIPER PAYROLL REF808789","3547.54","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"05/12/2025","TFR","TFR OSPREY LEASING REF130725","4332.89","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"06/12/2025","FPI","FPI MOORLAND TELECOM REF648603","1588.45","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"06/12/2025","DD","DD LARKSPUR TRAVEL REF867714","-4678.55","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"06/12/2025","BP","BP MOORLAND TELECOM REF592728","-634.91","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"07/12/2025","TFR","TFR DELPHINIUM MEDIA REF999250","7658.19","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"08/12/2025","DD","DD BRAMBLE LOGISTICS REF257021","-8705.53","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"10/12/2025","FPI","FPI CASTLEGATE PROPERTY REF984812","7820.90","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"10/12/2025","FPI","FPI CASTLEGATE PROPERTY REF103358","14919.35","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"10/12/2025","DD","DD IRONBRIDGE TOOLING REF515584","-7177.97","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"14/12/2025","CR","CR BRAMBLE LOGISTICS REF674916","1119.16","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"15/12/2025","CR","CR EASTFIELD ENERGY REF843462","12931.93","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"17/12/2025","DD","DD HARBOURLIGHT IT REF934236","-3931.79","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"17/12/2025","DD","DD MOORLAND TELECOM REF522602","-384.69","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"20/12/2025","SO","SO HARBOURLIGHT IT REF403261","-8911.03","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"20/12/2025","BP","BP KESTREL INSURANCE REF231000","-4756.25","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"21/12/2025","DD","DD IRONBRIDGE TOOLING REF289874","-9676.63","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"22/12/2025","SO","SO GREENHOLM FOODS REF438157","-13520.08","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"22/12/2025","DD","DD IRONBRIDGE TOOLING REF232761","-9670.50","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"22/12/2025","BP","BP DELPHINIUM MEDIA REF699157","-8214.55","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"24/12/2025","BP","BP HARBOURLIGHT IT REF875049","-12554.41","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"25/12/2025","BP","BP CASTLEGATE PROPERTY REF688500","-2413.72","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"26/12/2025","FPI","FPI IRONBRIDGE TOOLING REF704103","7989.74","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"26/12/2025","DD","DD BRAMBLE LOGISTICS REF992666","-9395.35","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"27/12/2025","FPI","FPI BRAMBLE LOGISTICS REF212623","8569.94","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"29/12/2025","BP","BP FENWICK & PARTNERS REF912181","-3754.24","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
"30/12/2025","SO","SO NORTHGATE CLEANING REF735759","-8326.78","LEDGERBENCH DEMO LTD","60-56-22 40027082","acct-2026300003-3"
 

Ground truth

Public here because the benchmark is open; it is the model's prompt path that can never reach these values, not human readers.

AccountClosing balance
acct-2026300003-1£45,411.01
acct-2026300003-2£44,378.94
acct-2026300003-3£140,318.96

Recorded runs on this case

  • wrongSingle prompt2 steps · 12,275 tokens · Confidence medium

    Model claude-sonnet-4-6Measured 2026-08-20Bench v1.0Run 11eaa71b2d02Commit 3d38c30

  • wrongAgent with tools19 steps · 50,414 tokens · Confidence medium

    Model claude-sonnet-4-6Measured 2026-08-20Bench v1.0Run f140aa1e57f4Commit 384d72d

Step through any of these on the demo page.