For your information, the following programs from the old published programs contain the word chess.
The number after the publication number is the number of lines in the program.
CXV562 547
DBG614 109
DBX768 1169
FXQ239 2 (1470 lines as text)
GMT047-1 872
GQC905 1223
HBD489 2747
HQQ405 289
HQQ405-0 307
HQQ405-2 403
HQQ405-3 426
JWC757 1203
KBG448 1329
KNR573 1370
MQR842 523
MRH408 1472
NBH742 1156
QXQ421 1157
SFW403 1177
SJQ481 1162
SJQ481-3 1162
SQC882 1214
TKM405 1179
TLL449 149
TNS425 1471
VGR040 1175
VVS441 29
EDIT : two number of lines edited
The number after the publication number is the number of lines in the program.
CXV562 547
DBG614 109
DBX768 1169
FXQ239 2 (1470 lines as text)
GMT047-1 872
GQC905 1223
HBD489 2747
HQQ405 289
HQQ405-0 307
HQQ405-2 403
HQQ405-3 426
JWC757 1203
KBG448 1329
KNR573 1370
MQR842 523
MRH408 1472
NBH742 1156
QXQ421 1157
SFW403 1177
SJQ481 1162
SJQ481-3 1162
SQC882 1214
TKM405 1179
TLL449 149
TNS425 1471
VGR040 1175
VVS441 29
EDIT : two number of lines edited