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missing_balance

missing_balance-2026300004

The opening balance is gone: the answer is uncomputable.

expects missing_balance

Statement files

These files are the untouched baseline for seed 2026300004.

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-2026300004-2-2025-10-31</MsgId>
<CreDtTm>2025-10-31T23:59:00+00:00</CreDtTm>
</GrpHdr>
<Stmt>
<Id>acct-2026300004-2</Id>
<ElctrncSeqNb>1</ElctrncSeqNb>
<CreDtTm>2025-10-31T23:59:00+00:00</CreDtTm>
<FrToDt>
<FrDtTm>2025-10-01T00:00:00+00:00</FrDtTm>
<ToDtTm>2025-10-31T23:59:59+00:00</ToDtTm>
</FrToDt>
<Acct>
<Id>
<IBAN>GB73LBEN26196729124938</IBAN>
</Id>
<Ccy>GBP</Ccy>
</Acct>
<Bal>
<Tp>
<CdOrPrtry>
<Cd>OPBD</Cd>
</CdOrPrtry>
</Tp>
<Amt Ccy="GBP">157360.25</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Dt>
<Dt>2025-10-01</Dt>
</Dt>
</Bal>
<Ntry>
<Amt Ccy="GBP">9084.87</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-10-02</Dt>
</BookgDt>
<ValDt>
<Dt>2025-10-02</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300004-2-t008</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>DD DELPHINIUM MEDIA REF387546</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">8641.62</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-10-03</Dt>
</BookgDt>
<ValDt>
<Dt>2025-10-03</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300004-2-t025</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>SO IRONBRIDGE TOOLING REF552232</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">12244.82</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-10-05</Dt>
</BookgDt>
<ValDt>
<Dt>2025-10-05</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300004-2-t002</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>DD KESTREL INSURANCE REF606898</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">5344.49</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-10-06</Dt>
</BookgDt>
<ValDt>
<Dt>2025-10-06</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300004-2-t004</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>DD HARBOURLIGHT IT REF612584</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">10247.41</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-10-06</Dt>
</BookgDt>
<ValDt>
<Dt>2025-10-06</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300004-2-t007</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>SO IRONBRIDGE TOOLING REF371267</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">13357.23</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-10-07</Dt>
</BookgDt>
<ValDt>
<Dt>2025-10-07</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300004-2-t014</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPI GREENHOLM FOODS REF852143</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">8559.60</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-10-08</Dt>
</BookgDt>
<ValDt>
<Dt>2025-10-08</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300004-2-t003</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>SO HARBOURLIGHT IT REF105884</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">14095.25</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-10-08</Dt>
</BookgDt>
<ValDt>
<Dt>2025-10-08</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300004-2-t022</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPO LARKSPUR TRAVEL REF139450</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">4813.84</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-10-08</Dt>
</BookgDt>
<ValDt>
<Dt>2025-10-08</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300004-2-t026</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>CR AURORA CONSULTING LTD REF719255</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">5989.64</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-10-10</Dt>
</BookgDt>
<ValDt>
<Dt>2025-10-10</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300004-2-t018</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPO IRONBRIDGE TOOLING REF351882</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">8411.59</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-10-11</Dt>
</BookgDt>
<ValDt>
<Dt>2025-10-11</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300004-2-t013</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPO KESTREL INSURANCE REF332526</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">4105.94</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-10-12</Dt>
</BookgDt>
<ValDt>
<Dt>2025-10-12</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300004-2-t009</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP LARKSPUR TRAVEL REF803321</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">10058.02</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-10-12</Dt>
</BookgDt>
<ValDt>
<Dt>2025-10-12</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300004-2-t017</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPI MOORLAND TELECOM REF464785</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">10025.88</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-10-14</Dt>
</BookgDt>
<ValDt>
<Dt>2025-10-14</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300004-2-t029</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>TFR JUNIPER PAYROLL REF393052</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">3198.17</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-10-15</Dt>
</BookgDt>
<ValDt>
<Dt>2025-10-15</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300004-2-t021</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP JUNIPER PAYROLL REF144535</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">14555.63</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-10-15</Dt>
</BookgDt>
<ValDt>
<Dt>2025-10-15</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300004-2-t028</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>CR IRONBRIDGE TOOLING REF476609</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">5945.10</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-10-16</Dt>
</BookgDt>
<ValDt>
<Dt>2025-10-16</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300004-2-t010</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP BRAMBLE LOGISTICS REF112265</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">396.79</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-10-16</Dt>
</BookgDt>
<ValDt>
<Dt>2025-10-16</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300004-2-t024</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>DD CASTLEGATE PROPERTY REF303027</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">4855.95</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-10-18</Dt>
</BookgDt>
<ValDt>
<Dt>2025-10-18</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300004-2-t016</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>DD NORTHGATE CLEANING REF920285</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">5009.48</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-10-19</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: 86-37-83 24691289
Account reference: acct-2026300004-1
Statement period: 01 Oct 2025 to 31 Oct 2025
Currency: GBP
Date Payment type Details Paid out Paid in
03 Oct 2025 TFR GREENHOLM FOODS REF552011 9589.33
03 Oct 2025 FPO LARKSPUR TRAVEL REF815177 5027.83
04 Oct 2025 DD DELPHINIUM MEDIA REF177946 13502.60
06 Oct 2025 FPO HARBOURLIGHT IT REF776668 3166.98
07 Oct 2025 BP BRAMBLE LOGISTICS REF375281 1141.49
07 Oct 2025 CR JUNIPER PAYROLL REF503032 13720.39
08 Oct 2025 SO DELPHINIUM MEDIA REF461869 1969.54
08 Oct 2025 BP IRONBRIDGE TOOLING REF915276 14389.24
09 Oct 2025 CR DELPHINIUM MEDIA REF698293 2788.79
09 Oct 2025 FPO LARKSPUR TRAVEL REF491822 3151.95
09 Oct 2025 BP KESTREL INSURANCE REF276019 6515.88
10 Oct 2025 SO NORTHGATE CLEANING REF943100 7104.84
11 Oct 2025 DD EASTFIELD ENERGY REF995577 14532.93
12 Oct 2025 BP IRONBRIDGE TOOLING REF289510 3535.24
13 Oct 2025 CR FENWICK & PARTNERS REF375236 4983.47
16 Oct 2025 BP GREENHOLM FOODS REF845847 445.70
17 Oct 2025 FPO HARBOURLIGHT IT REF148598 11479.59
17 Oct 2025 BP AURORA CONSULTING LTD REF380903 4765.51
17 Oct 2025 DD IRONBRIDGE TOOLING REF755734 6316.46
18 Oct 2025 FPI EASTFIELD ENERGY REF263564 13623.09
22 Oct 2025 DD GREENHOLM FOODS REF878198 8005.15
27 Oct 2025 CR LARKSPUR TRAVEL REF323295 1031.28
27 Oct 2025 BP OSPREY LEASING REF317667 9013.01
28 Oct 2025 FPO OSPREY LEASING REF605041 4786.00
28 Oct 2025 BP HARBOURLIGHT IT REF772446 2330.40
28 Oct 2025 DD IRONBRIDGE TOOLING REF123948 10762.57
28 Oct 2025 CR BRAMBLE LOGISTICS REF319722 13723.24
29 Oct 2025 FPI NORTHGATE CLEANING REF730205 12711.88
30 Oct 2025 DD BRAMBLE LOGISTICS REF344655 5809.08
31 Oct 2025 CR EASTFIELD ENERGY REF682690 13171.90
rbs_transactions.csvUntouched by this perturbation
"Date","Type","Description","Value","Account Name","Account Number","Ledger Ref"
"01/10/2025","BAL","OPENING BALANCE","9932.52","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"02/10/2025","FPI","FPI NORTHGATE CLEANING REF921074","3723.24","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"05/10/2025","FPO","FPO JUNIPER PAYROLL REF940930","-5017.53","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"06/10/2025","CR","CR IRONBRIDGE TOOLING REF152186","6648.12","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"06/10/2025","FPO","FPO NORTHGATE CLEANING REF325416","-14971.58","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"06/10/2025","FPO","FPO IRONBRIDGE TOOLING REF488183","-5197.76","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"06/10/2025","CR","CR KESTREL INSURANCE REF819134","9474.74","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"08/10/2025","FPO","FPO OSPREY LEASING REF903602","-10501.31","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"08/10/2025","FPI","FPI JUNIPER PAYROLL REF387273","9963.07","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"08/10/2025","TFR","TFR HARBOURLIGHT IT REF390563","7730.83","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"10/10/2025","CR","CR EASTFIELD ENERGY REF745048","4626.62","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"12/10/2025","DD","DD FENWICK & PARTNERS REF210526","-13229.72","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"13/10/2025","DD","DD EASTFIELD ENERGY REF774438","-13301.69","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"15/10/2025","FPO","FPO GREENHOLM FOODS REF780015","-7574.40","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"15/10/2025","DD","DD CASTLEGATE PROPERTY REF524764","-11037.23","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"17/10/2025","FPO","FPO AURORA CONSULTING LTD REF947083","-13666.91","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"18/10/2025","TFR","TFR IRONBRIDGE TOOLING REF226654","11328.25","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"18/10/2025","FPO","FPO BRAMBLE LOGISTICS REF166597","-11355.90","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"19/10/2025","BP","BP OSPREY LEASING REF450824","-14054.83","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"21/10/2025","FPI","FPI LARKSPUR TRAVEL REF247325","6750.52","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"22/10/2025","DD","DD LARKSPUR TRAVEL REF100306","-1112.04","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"22/10/2025","DD","DD OSPREY LEASING REF691481","-5274.85","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"23/10/2025","TFR","TFR LARKSPUR TRAVEL REF668160","13058.11","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"23/10/2025","FPO","FPO HARBOURLIGHT IT REF669778","-7042.78","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"24/10/2025","TFR","TFR MOORLAND TELECOM REF583910","11956.02","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"25/10/2025","SO","SO CASTLEGATE PROPERTY REF345390","-8385.37","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"25/10/2025","BP","BP AURORA CONSULTING LTD REF119064","-4192.10","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"29/10/2025","BP","BP KESTREL INSURANCE REF713800","-8801.80","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"29/10/2025","FPO","FPO CASTLEGATE PROPERTY REF775859","-1069.75","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"29/10/2025","FPO","FPO BRAMBLE LOGISTICS REF558488","-6748.04","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"29/10/2025","TFR","TFR KESTREL INSURANCE REF997819","404.42","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"29/10/2025","BP","BP HARBOURLIGHT IT REF961975","-7833.39","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
"30/10/2025","FPI","FPI AURORA CONSULTING LTD REF627781","6732.74","LEDGERBENCH DEMO LTD","74-60-58 62757367","acct-2026300004-3"
 

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-2026300004-1£159,628.24
acct-2026300004-2£157,487.22
acct-2026300004-3−£68,039.78

Recorded runs on this case

  • wrongSingle prompt2 steps · 13,691 tokens · Confidence low

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

  • wrongAgent with tools22 steps · 64,930 tokens · Confidence low

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

Step through any of these on the demo page.