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missing_balance

missing_balance-2026300001

The opening balance is gone: the answer is uncomputable.

expects missing_balance

Statement files

These files are the untouched baseline for seed 2026300001.

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-2026300001-2-2025-05-31</MsgId>
<CreDtTm>2025-05-31T23:59:00+00:00</CreDtTm>
</GrpHdr>
<Stmt>
<Id>acct-2026300001-2</Id>
<ElctrncSeqNb>1</ElctrncSeqNb>
<CreDtTm>2025-05-31T23:59:00+00:00</CreDtTm>
<FrToDt>
<FrDtTm>2025-05-01T00:00:00+00:00</FrDtTm>
<ToDtTm>2025-05-31T23:59:59+00:00</ToDtTm>
</FrToDt>
<Acct>
<Id>
<IBAN>GB41LBEN47218228303868</IBAN>
</Id>
<Ccy>GBP</Ccy>
</Acct>
<Bal>
<Tp>
<CdOrPrtry>
<Cd>OPBD</Cd>
</CdOrPrtry>
</Tp>
<Amt Ccy="GBP">116956.02</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Dt>
<Dt>2025-05-01</Dt>
</Dt>
</Bal>
<Ntry>
<Amt Ccy="GBP">10462.68</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-05-01</Dt>
</BookgDt>
<ValDt>
<Dt>2025-05-01</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300001-2-t019</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>CR EASTFIELD ENERGY REF818322</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">3564.67</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-05-02</Dt>
</BookgDt>
<ValDt>
<Dt>2025-05-02</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300001-2-t008</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>CR JUNIPER PAYROLL REF432305</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">5930.89</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-05-03</Dt>
</BookgDt>
<ValDt>
<Dt>2025-05-03</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300001-2-t006</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>TFR MOORLAND TELECOM REF976583</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">2082.95</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-05-03</Dt>
</BookgDt>
<ValDt>
<Dt>2025-05-03</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300001-2-t021</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>CR DELPHINIUM MEDIA REF203544</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">7789.30</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-05-05</Dt>
</BookgDt>
<ValDt>
<Dt>2025-05-05</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300001-2-t003</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPI DELPHINIUM MEDIA REF189840</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">8911.24</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-05-06</Dt>
</BookgDt>
<ValDt>
<Dt>2025-05-06</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300001-2-t011</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPI DELPHINIUM MEDIA REF502327</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">7787.94</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-05-07</Dt>
</BookgDt>
<ValDt>
<Dt>2025-05-07</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300001-2-t009</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPO BRAMBLE LOGISTICS REF362888</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">13604.33</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-05-07</Dt>
</BookgDt>
<ValDt>
<Dt>2025-05-07</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300001-2-t018</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP AURORA CONSULTING LTD REF219314</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">4898.12</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-05-08</Dt>
</BookgDt>
<ValDt>
<Dt>2025-05-08</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300001-2-t017</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>CR MOORLAND TELECOM REF420861</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">813.32</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-05-10</Dt>
</BookgDt>
<ValDt>
<Dt>2025-05-10</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300001-2-t022</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPI CASTLEGATE PROPERTY REF929628</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">7311.30</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-05-10</Dt>
</BookgDt>
<ValDt>
<Dt>2025-05-10</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300001-2-t026</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP KESTREL INSURANCE REF524932</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">6107.03</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-05-12</Dt>
</BookgDt>
<ValDt>
<Dt>2025-05-12</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300001-2-t010</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPO EASTFIELD ENERGY REF272576</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">11803.42</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-05-15</Dt>
</BookgDt>
<ValDt>
<Dt>2025-05-15</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300001-2-t001</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>CR HARBOURLIGHT IT REF976562</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">4355.42</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-05-17</Dt>
</BookgDt>
<ValDt>
<Dt>2025-05-17</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300001-2-t012</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>CR OSPREY LEASING REF893868</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">2179.38</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-05-19</Dt>
</BookgDt>
<ValDt>
<Dt>2025-05-19</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300001-2-t004</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP CASTLEGATE PROPERTY REF461744</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">1003.87</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-05-19</Dt>
</BookgDt>
<ValDt>
<Dt>2025-05-19</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300001-2-t005</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>DD IRONBRIDGE TOOLING REF411447</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">9093.74</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-05-19</Dt>
</BookgDt>
<ValDt>
<Dt>2025-05-19</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300001-2-t025</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPI MOORLAND TELECOM REF697622</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">11320.12</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-05-22</Dt>
</BookgDt>
<ValDt>
<Dt>2025-05-22</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300001-2-t013</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP KESTREL INSURANCE REF870082</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">9881.91</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-05-22</Dt>
</BookgDt>
<ValDt>
<Dt>2025-05-22</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300001-2-t014</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>TFR GREENHOLM FOODS REF896016</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">11881.18</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-05-22</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: 39-12-51 88199232
Account reference: acct-2026300001-1
Statement period: 01 May 2025 to 31 May 2025
Currency: GBP
Date Payment type Details Paid out Paid in
01 May 2025 TFR JUNIPER PAYROLL REF651249 10143.24
04 May 2025 TFR DELPHINIUM MEDIA REF149009 2491.42
04 May 2025 TFR OSPREY LEASING REF374277 3748.11
05 May 2025 FPO JUNIPER PAYROLL REF621965 13871.13
07 May 2025 TFR HARBOURLIGHT IT REF547709 1563.07
08 May 2025 SO AURORA CONSULTING LTD REF640451 4661.44
09 May 2025 DD HARBOURLIGHT IT REF122018 10930.67
09 May 2025 FPI IRONBRIDGE TOOLING REF817145 6105.92
11 May 2025 FPO NORTHGATE CLEANING REF610897 10139.05
14 May 2025 CR NORTHGATE CLEANING REF211309 7448.56
15 May 2025 BP FENWICK & PARTNERS REF306774 1529.58
15 May 2025 FPO LARKSPUR TRAVEL REF408952 10485.40
15 May 2025 TFR GREENHOLM FOODS REF185710 6685.80
15 May 2025 FPI AURORA CONSULTING LTD REF957348 8109.09
15 May 2025 FPI GREENHOLM FOODS REF895504 2529.31
15 May 2025 BP MOORLAND TELECOM REF924843 6623.55
17 May 2025 TFR CASTLEGATE PROPERTY REF462063 14877.79
17 May 2025 BP IRONBRIDGE TOOLING REF505189 11085.71
19 May 2025 FPO MOORLAND TELECOM REF323674 12279.77
20 May 2025 DD OSPREY LEASING REF397453 6939.98
21 May 2025 CR MOORLAND TELECOM REF875819 2500.78
24 May 2025 CR IRONBRIDGE TOOLING REF332491 1120.64
25 May 2025 FPI GREENHOLM FOODS REF734256 612.04
26 May 2025 FPI MOORLAND TELECOM REF687577 11857.33
27 May 2025 FPI EASTFIELD ENERGY REF739009 12720.94
rbs_transactions.csvUntouched by this perturbation
"Date","Type","Description","Value","Account Name","Account Number","Ledger Ref"
"01/05/2025","BAL","OPENING BALANCE","228751.36","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"01/05/2025","FPI","FPI OSPREY LEASING REF768667","1764.43","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"02/05/2025","SO","SO MOORLAND TELECOM REF488810","-3232.05","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"04/05/2025","FPO","FPO KESTREL INSURANCE REF367763","-13160.14","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"07/05/2025","SO","SO OSPREY LEASING REF395576","-14462.83","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"09/05/2025","DD","DD EASTFIELD ENERGY REF310361","-11076.28","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"10/05/2025","CR","CR CASTLEGATE PROPERTY REF481483","3089.54","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"13/05/2025","BP","BP AURORA CONSULTING LTD REF917790","-7691.49","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"13/05/2025","BP","BP EASTFIELD ENERGY REF838577","-4451.09","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"14/05/2025","FPI","FPI CASTLEGATE PROPERTY REF600526","10919.92","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"14/05/2025","SO","SO IRONBRIDGE TOOLING REF450468","-13975.46","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"14/05/2025","SO","SO BRAMBLE LOGISTICS REF575431","-4639.77","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"15/05/2025","FPI","FPI DELPHINIUM MEDIA REF698204","10547.90","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"15/05/2025","FPO","FPO LARKSPUR TRAVEL REF844819","-14156.76","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"18/05/2025","FPO","FPO BRAMBLE LOGISTICS REF656979","-26.45","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"19/05/2025","BP","BP CASTLEGATE PROPERTY REF682673","-3423.91","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"20/05/2025","TFR","TFR EASTFIELD ENERGY REF882753","10997.10","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"22/05/2025","FPO","FPO CASTLEGATE PROPERTY REF621982","-5555.15","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"25/05/2025","FPI","FPI EASTFIELD ENERGY REF649630","13714.43","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"26/05/2025","SO","SO HARBOURLIGHT IT REF912188","-12119.46","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"27/05/2025","DD","DD DELPHINIUM MEDIA REF746608","-11315.53","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"27/05/2025","SO","SO NORTHGATE CLEANING REF293495","-7728.65","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"27/05/2025","FPI","FPI NORTHGATE CLEANING REF182469","8237.13","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"28/05/2025","CR","CR KESTREL INSURANCE REF474178","4332.23","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"28/05/2025","CR","CR BRAMBLE LOGISTICS REF373454","1004.11","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"30/05/2025","CR","CR KESTREL INSURANCE REF369146","1373.68","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"31/05/2025","FPO","FPO LARKSPUR TRAVEL REF588327","-5517.60","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
"31/05/2025","FPO","FPO CASTLEGATE PROPERTY REF566733","-9183.72","LEDGERBENCH DEMO LTD","34-19-26 39143762","acct-2026300001-3"
 

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-2026300001-1£47,230.56
acct-2026300001-2£101,165.21
acct-2026300001-3£153,015.49

Recorded runs on this case

  • wrongSingle prompt2 steps · 11,779 tokens · Confidence medium

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

  • wrongAgent with tools20 steps · 46,480 tokens · Confidence medium

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

Step through any of these on the demo page.