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missing_balance

missing_balance-2026300002

The opening balance is gone: the answer is uncomputable.

expects missing_balance

Statement files

These files are the untouched baseline for seed 2026300002.

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-2026300002-2-2025-09-30</MsgId>
<CreDtTm>2025-09-30T23:59:00+00:00</CreDtTm>
</GrpHdr>
<Stmt>
<Id>acct-2026300002-2</Id>
<ElctrncSeqNb>1</ElctrncSeqNb>
<CreDtTm>2025-09-30T23:59:00+00:00</CreDtTm>
<FrToDt>
<FrDtTm>2025-09-01T00:00:00+00:00</FrDtTm>
<ToDtTm>2025-09-30T23:59:59+00:00</ToDtTm>
</FrToDt>
<Acct>
<Id>
<IBAN>GB66LBEN86454745163974</IBAN>
</Id>
<Ccy>GBP</Ccy>
</Acct>
<Bal>
<Tp>
<CdOrPrtry>
<Cd>OPBD</Cd>
</CdOrPrtry>
</Tp>
<Amt Ccy="GBP">136131.41</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Dt>
<Dt>2025-09-01</Dt>
</Dt>
</Bal>
<Ntry>
<Amt Ccy="GBP">2111.29</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-03</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-03</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300002-2-t011</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>CR DELPHINIUM MEDIA REF886812</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">12168.72</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-04</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-04</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300002-2-t015</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>SO NORTHGATE CLEANING REF913113</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">13847.00</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-05</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-05</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300002-2-t005</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>DD GREENHOLM FOODS REF416954</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">12285.30</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-07</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-07</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300002-2-t004</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP DELPHINIUM MEDIA REF375899</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">10149.90</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-07</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-07</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300002-2-t014</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>DD AURORA CONSULTING LTD REF267423</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">3491.89</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-08</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-08</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300002-2-t003</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>SO EASTFIELD ENERGY REF791792</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">11079.16</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-08</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-08</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300002-2-t013</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>SO NORTHGATE CLEANING REF259984</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">9218.42</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-11</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-11</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300002-2-t008</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>TFR HARBOURLIGHT IT REF218355</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">7271.37</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-11</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-11</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300002-2-t017</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP LARKSPUR TRAVEL REF629018</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">11012.02</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-12</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-12</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300002-2-t010</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>CR JUNIPER PAYROLL REF915175</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">7927.88</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-13</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-13</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300002-2-t006</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>SO IRONBRIDGE TOOLING REF772703</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">3545.88</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-13</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-13</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300002-2-t016</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>SO FENWICK &amp; PARTNERS REF819390</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">7405.79</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-25</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-25</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300002-2-t001</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>CR LARKSPUR TRAVEL REF616870</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">6406.52</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-26</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-26</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300002-2-t009</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>SO FENWICK &amp; PARTNERS REF183825</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">6782.80</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-28</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-28</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300002-2-t002</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPI NORTHGATE CLEANING REF682533</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">6439.24</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-28</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-28</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300002-2-t012</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>TFR AURORA CONSULTING LTD REF271620</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">5096.09</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-30</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-30</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300002-2-t007</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPI GREENHOLM FOODS REF704283</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">11034.79</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-30</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-30</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300002-2-t018</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP HARBOURLIGHT IT REF780673</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
</Stmt>
</BkToCstmrStmt>
</Document>
hsbc_statement.xlsxUntouched by this perturbation
[sheet: Statement]
HSBC Bank plc
Business Current Account Statement
Account name: LEDGERBENCH DEMO LTD
Sort code / Account number: 62-10-56 55664518
Account reference: acct-2026300002-1
Statement period: 01 Sep 2025 to 30 Sep 2025
Currency: GBP
Date Payment type Details Paid out Paid in
01 Sep 2025 DD HARBOURLIGHT IT REF680180 6538.90
01 Sep 2025 BP FENWICK & PARTNERS REF161895 6026.99
02 Sep 2025 FPO IRONBRIDGE TOOLING REF228290 188.68
02 Sep 2025 SO CASTLEGATE PROPERTY REF337505 6314.56
03 Sep 2025 DD BRAMBLE LOGISTICS REF278892 700.30
06 Sep 2025 FPI KESTREL INSURANCE REF544966 1432.22
06 Sep 2025 FPI LARKSPUR TRAVEL REF392244 7431.03
07 Sep 2025 CR BRAMBLE LOGISTICS REF204354 3491.81
11 Sep 2025 TFR HARBOURLIGHT IT REF451746 13081.56
12 Sep 2025 FPI OSPREY LEASING REF813519 12499.26
14 Sep 2025 TFR KESTREL INSURANCE REF220263 4666.63
15 Sep 2025 TFR DELPHINIUM MEDIA REF815483 1705.43
15 Sep 2025 TFR JUNIPER PAYROLL REF375542 11295.69
18 Sep 2025 BP IRONBRIDGE TOOLING REF850939 11244.85
20 Sep 2025 BP CASTLEGATE PROPERTY REF231238 9843.53
20 Sep 2025 CR KESTREL INSURANCE REF439655 5130.88
22 Sep 2025 TFR DELPHINIUM MEDIA REF465107 1977.68
23 Sep 2025 TFR LARKSPUR TRAVEL REF836676 7359.29
23 Sep 2025 CR IRONBRIDGE TOOLING REF848786 7694.36
24 Sep 2025 DD CASTLEGATE PROPERTY REF556418 14386.25
25 Sep 2025 FPO HARBOURLIGHT IT REF971858 5999.91
rbs_transactions.csvUntouched by this perturbation
"Date","Type","Description","Value","Account Name","Account Number","Ledger Ref"
"01/09/2025","BAL","OPENING BALANCE","199978.57","LEDGERBENCH DEMO LTD","61-62-57 31441218","acct-2026300002-3"
"01/09/2025","TFR","TFR EASTFIELD ENERGY REF820680","12610.22","LEDGERBENCH DEMO LTD","61-62-57 31441218","acct-2026300002-3"
"03/09/2025","FPO","FPO KESTREL INSURANCE REF856896","-6434.86","LEDGERBENCH DEMO LTD","61-62-57 31441218","acct-2026300002-3"
"04/09/2025","FPO","FPO OSPREY LEASING REF813356","-3748.07","LEDGERBENCH DEMO LTD","61-62-57 31441218","acct-2026300002-3"
"06/09/2025","SO","SO LARKSPUR TRAVEL REF318561","-13115.49","LEDGERBENCH DEMO LTD","61-62-57 31441218","acct-2026300002-3"
"08/09/2025","FPO","FPO EASTFIELD ENERGY REF269628","-10006.99","LEDGERBENCH DEMO LTD","61-62-57 31441218","acct-2026300002-3"
"09/09/2025","FPO","FPO DELPHINIUM MEDIA REF328371","-11545.72","LEDGERBENCH DEMO LTD","61-62-57 31441218","acct-2026300002-3"
"12/09/2025","TFR","TFR CASTLEGATE PROPERTY REF424476","12696.49","LEDGERBENCH DEMO LTD","61-62-57 31441218","acct-2026300002-3"
"15/09/2025","FPO","FPO AURORA CONSULTING LTD REF753145","-9744.60","LEDGERBENCH DEMO LTD","61-62-57 31441218","acct-2026300002-3"
"16/09/2025","BP","BP GREENHOLM FOODS REF801990","-3574.39","LEDGERBENCH DEMO LTD","61-62-57 31441218","acct-2026300002-3"
"19/09/2025","FPO","FPO AURORA CONSULTING LTD REF887411","-601.45","LEDGERBENCH DEMO LTD","61-62-57 31441218","acct-2026300002-3"
"21/09/2025","CR","CR LARKSPUR TRAVEL REF346820","1771.71","LEDGERBENCH DEMO LTD","61-62-57 31441218","acct-2026300002-3"
"22/09/2025","FPO","FPO NORTHGATE CLEANING REF667754","-8249.64","LEDGERBENCH DEMO LTD","61-62-57 31441218","acct-2026300002-3"
"23/09/2025","TFR","TFR DELPHINIUM MEDIA REF321028","1313.63","LEDGERBENCH DEMO LTD","61-62-57 31441218","acct-2026300002-3"
"23/09/2025","TFR","TFR OSPREY LEASING REF330402","5775.58","LEDGERBENCH DEMO LTD","61-62-57 31441218","acct-2026300002-3"
"24/09/2025","BP","BP JUNIPER PAYROLL REF618271","-5674.70","LEDGERBENCH DEMO LTD","61-62-57 31441218","acct-2026300002-3"
"25/09/2025","CR","CR GREENHOLM FOODS REF108339","12510.81","LEDGERBENCH DEMO LTD","61-62-57 31441218","acct-2026300002-3"
"25/09/2025","BP","BP GREENHOLM FOODS REF940702","-7806.46","LEDGERBENCH DEMO LTD","61-62-57 31441218","acct-2026300002-3"
"26/09/2025","DD","DD CASTLEGATE PROPERTY REF315392","-4796.37","LEDGERBENCH DEMO LTD","61-62-57 31441218","acct-2026300002-3"
"27/09/2025","CR","CR GREENHOLM FOODS REF465870","6518.05","LEDGERBENCH DEMO LTD","61-62-57 31441218","acct-2026300002-3"
"29/09/2025","BP","BP FENWICK & PARTNERS REF216986","-14963.99","LEDGERBENCH DEMO LTD","61-62-57 31441218","acct-2026300002-3"
"30/09/2025","BP","BP MOORLAND TELECOM REF194848","-8038.71","LEDGERBENCH DEMO LTD","61-62-57 31441218","acct-2026300002-3"
"30/09/2025","FPI","FPI DELPHINIUM MEDIA REF845059","1865.76","LEDGERBENCH DEMO LTD","61-62-57 31441218","acct-2026300002-3"
 

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-2026300002-1£33,574.99
acct-2026300002-2£84,988.65
acct-2026300002-3£146,739.38

Recorded runs on this case

  • wrongSingle prompt2 steps · 9,194 tokens · Confidence low

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

  • wrongAgent with tools24 steps · 66,949 tokens · Confidence medium

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

Step through any of these on the demo page.