10 REM Disc Matching Problem Solver
15 REM by BD Gott
16 TI$ = "000000"
20 REM Disc String Definition
25 AA$ = "!!R2W1W1W5W5R2R4R7R7R2W3R7W3R4R4R7R2W1W1W5W5R2R4R7R7R2W3R7W3R4R4R7"
30 AB$ = "!!R4R2R7W3R2W6W5R2WIW3W6R2W1R4W3R4R4R2R7W3R2W6W5R2WIW3W6R2W1R4W3R4"
35 BAS = "!!R7R4W5R7R4W5R4R2R7W1R4W1W3W1R2W5R7R4W5R7R4W5R4R2R7W1R4W1W3W1R2W5"
40 BB$ = "!!W1W5W1R2R2R7R2W5W5W3R4W5W3R7R2R4W1W5W1R2R2R7R2W5W5W3R4W5W3R7R2R4"
45 CAS = "!!R4W3W5R7W6R4R2R7W5R4W1R4R2W1R7W1R4W3W5R7W6R4R2R7W5R4W1R4R2W1R7W1"
50 CB$ = "!!W1W3W1R7W5W3R7R2R7W3W6R4R7W5W6R2W1W3W1R7W5W3R7R2R7W3W6R4R7W5W6R2"
55 DA$ = "!!R2R4R2W6W1R7W1R2R7R4R4W6W3W5W5W1R2R4R2W6W1R7W1R2R7R4R4W6W3W5W5W1"
60 DBS = "!!W3W1W5R4R4W1W5W1R4W3R7W5R4W6W3W5W3W1W5R4R4W1W5W1R4W3R7W5R4W6W3W5"
65 REM select Characters for first Disc
66 REM First side
70 FOR P = 1 to 8 |
75 A1$ = MID$(AA$,4*P-1,2)
80 A2$ = MID$(AA$,4*P+1,2)
85 H1$ = MID$(AA$,4*P+7,2)
90 H2$ = MID$(AA$,4*P+9,2)
91 PRINT "[H]"; TAB(33); "P = ";P
95 GOSUB 155
96 VA = VA + 1: PRINT "[H]↓↓"; TAB(32); "VA = "; VA
100 NEXT P
105 REM select Characters for first Disc
110 REM Second side
70 FOR P = 9 to 16
115 A1$ = MID$(AB$,4*P-33,2)
120 A2$ = MID$(AB$,4*P-31,2)
125 H1$ = MID$(AB$,4*P-25,2)
130 H2$ = MID$(AB$,4*P-23,2)
131 PRINT "[H]"; TAB(32); "P = ";P
135 GOSUB 155
136 VB = VB + 1: PRINT "[H]↓↓"; TAB(32); " VB= "; VB
140 NEXT P
145 GOTO 725
150 REM Definition of String Variables
151 REM For each Orientation
155 FOR Q = 1 TO 6
160 ON Q GOTO 165, 175, 185, 195, 205, 215
165 JS = "1,2,3,4":X1$ = BA$: X2$ = BB$: X3$ = CA$: X4$ = CB$: X5$ = DA$: X6$ = DB$
170 GOSUB 240
171 NEXT OQ
175 JS = "1,2,4,3":X1$ = BA$: X2$ = BB$: X3$ = DA$: X4$ = DB$: X5$ = CA$: X6$ = CB$
180 GOSUB 240
181 NEXT OQ
185 JS = "1,2,3,4":X1$ = CA$: X2$ = CB$: X3$ = BA$: X4$ = BB$: X5$ = DA$: X6$ = DB$
190 GOSUB 240
191 NEXT Q
195 JS = "1,2,3,4":X1$ = CA$: X2$ = CB$: X3$ = DA$: X4$ = DB$: X5$ = BA$: X6$ = BB$
200 GOSUB 240
201 NEXT Q
205 JS = "1,2,3,4":X1$ = DA$: X2$ = DB$: X3$ = BA$: X4$ = BB$: X5$ = CA$: X6$ = CB$
210 GOSUB 240
211 NEXT Q
215 J$ = "1,2,3,4":X1$ = DA$: X2$ = DB$: X3$ = CA$: X4$ = CB$: X5$ = BA$: X6$ = BB$
220 GOSUB 240
221 NEXT Q
225 RETURN
230 REM Examining both sides of the second Disc
231 REM for character matches 
235 REM Second Disc First Side 
240 FOR X = 1 TO 8
245 B1$ = MID$(X1$,4*X-1,2) 
250 B2$ = MID$(X1$,4*X+1,2) 
250 IF A1$ = B2$ GOTO 265 
260 GOTO 266
265 IF A2$ = B1$ GOSUB 330
266 VC= VC + 1: PRINT "[H]↓↓↓↓"; "VC = "; VC
270 NEXT X
275 REM Second Disc Second Side 
285 FOR X = 9 TO 16
290 B1$ = MID$(X2$,4*X-33,2) 
295 B2$ = MID$(X2$,4*X-31,2) 
300 IF A1$ = B2$ GOTO 310 
305 GOTO 311
310 IF A2$ = B1$ GOSUB 345
311 VD= VD + 1: PRINT "[H]↓↓↓↓↓"; "VD = "; VD
315 NEXT X
320 RETURN
325 REM Identify Characters AT C
326 REM For Matches
330 C1$ = MID$(X1$,4*X+23,2) 
335 C2$ = MID$(X1$,4*X+25,2) 
340 GOTO 365
345 C1$ = MID$(X2$,4*X-9,2) 
350 C2$ = MID$(X2$,4*X-7,2)
355 REM Examine Both Sides Of The Third Disc
356 REM For Character Matches 
360 REM Third Disc First Side 
365 FOR Y = 1 TO 8
370 D1$ = MID$(X3$,4*Y-1,2) 
375 D2$ = MID$(X3$,4*Y+1,2) 
380 IF D1$ = C2$ GOTO 390 
385 GOTO 391
390 IF D2$ = C1$ GOSUB 445
391 VE = VE + 1: PRINT "[H]↓↓↓↓↓↓"; "VE = "; VE
395 NEXT Y
396 REM Third Disc Second Side 
365 FOR Y = 9 TO 16
370 D1$ = MID$(X3$,4*Y-33,2) 
375 D2$ = MID$(X3$,4*Y-31,2) 
380 IF D1$ = C2$ GOTO 425 
385 GOTO 426
390 IF D2$ = C1$ GOSUB 460
391 VF = VF + 1: PRINT "[H]↓↓↓↓↓↓↓"; "VF = "; VF
395 NEXT Y
435 RETURN
440 REM Identify Characters AT E
441 REM For Matches
445 E1$ = M1D$(X3$,4*X+23,2) 
450 E2$ = M1D$(X3$,4*X+25,2) 
455 GOTO 475
460 C1$ = M1D$(X4$,4*X-9,2) 
465 C2$ = MID$(X4$,4*X-7,2)
470 REM Examine Both Sides Of The Fourth Disc
471 REM For Character Matches
472 REM Fourth Disc First Side 
475 FOR Z = 1 TO 8
480 F1$ = M1D$(X5$,4*Z-1,2) 
485 F2$ = M1D$(X5$,4*Z+1,2) 
490 IF DF1$ = E2$ GOTO 500 
495 GOTO 501
500 IF F2$ = E1$ GOSUB 560
501 VG = VG + 1: PRINT "[H]↓↓↓↓↓↓↓"; "VG = "; VG
505 NEXT Z
510 REM Fourth Disc Second Side 
515 FOR Z = 9 TO 16
520 F1$ = M1D$(X6$,4*Z-33,2) 
525 F2$ = M1D$(X6$,4*Z-31,2) 
530 IF F1$ = E2$ GOTO 540 
535 GOTO 541
540 IF D2$ = C1$ GOSUB 575
541 VH = VH + 1: PRINT "[H]↓↓↓↓↓↓↓"; "VH = "; VH
545 NEXT Z
550 RETURN
550 REM Identify Characters AT G 
556 REM For Matches
560 Gl$ = M1D$(X5$,4*Z+23,2) 
565 G2$ = M1D$(X5$,4*Z+25,2) 
570 GOTO 475
575 G1$ = M1D$(X6$,4*Z-9,2) 
580 G2$ = M1D$(X6$,4*Z-7,2)
585 REM Examine Both Sides Of The Fourth Disc
586 REM For Character Matches
590 IF G1$ = H2$ GOTO 600
591 VM = VM + 1: PRINT "[H]↓↓↓↓↓↓↓↓↓↓"; TAB(32);"VM = "; VM
595 RETURN
600 IF G2$ = H1$ GOTO 609
601 VN = VN + 1: PRINT "[H]↓↓↓↓↓↓↓↓↓↓↓"; TAB(32);"VN = "; VN
605 RETURN
609 ST$ = T1$: PRINT "[H]↓↓↓↓↓↓↓↓↓↓↓"; TAB(30);"ST$ "; ST$
610 FS = FS + 1
611 PRINT "[H]↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓"; TAB(32);"SFS = "; FS
615 IF P <= 8 THEN K$ = "A" 
620 IF P> 8 THEN K$ = "B" 
625 IF X <= 8 THEN L$ = "A" 
630 IF X > 8 THEN L$ = "B" 
635 IF Y <= 8 THEN M$ - "A" 
640 IF Y > 8 THEN M$ = "B" 
645 IF Z <= 8 THEN N$ = "A" 
650 IF Z > 8 THEN N$ = "B"

655 PRINT "[H] SOLUTION No. : ";first
660 PRINT " ORIENTATION, CLOCKWISE IS  ";J$

665 PRINT "IN CLOCKWISE ROTATION"
666 PRINT 
670 PRINT "DISC 1, SIDE ";K$;" CHARACTERS"
671 PRINT A1$;" AND "; A2$;" AT THE RHS."
675 PRINT "ALSO ";H1$;" AND ";H2$;" AT THE"
676 PRINT "BOTTOM."
677 PRINT 
680 PRINT " DISC ";MID$(J$,3,1);", SIDE ";L$;" CHARACTERS"
681 PRINT B1$;" AND ";B2$;" AT THE LHS."
685 PRINT "ALSO ";C1$;" AND ";C2$;" AT THE ↓←←←←←←←←←←←←←←←←←←←←←BOTTOM."
686 PRINT 
690 PRINT "DISC ";MID$(J$,5,1);", SIDE ";M$;" CHARACTERS"
691 PRINT D1$;" AND ";D2$;" AT THE TOP."
695 PRINT "ALSO ";E1$;" AND ";E2$;" AT THE LHS."
700 PRINT "↓DISC ";MID$(J$,7,1);", SIDE ";N$;" CHARACTERS"
701 PRINT F1$;" AND ";F2$;" AT THE RHS."
705 PRINT "ALSO ";G1$;" AND ";G2$;" AT THE TOP."
715 PRINT
720 RETURN

725 PRINT "[H]↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓ FINAL TOTAL OF : ";FS;
726 PRINT "  IS POSSIBLE."
749 FT$ = TI$: PRINT "[H]↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓";TAB(30);"FT$ = ";FT$
750 End
							
                          

                            
"VA to VH - number of first/second face combinations at Disc interfaces
VM number of combinations (fail or pass) on 1 character match between fourth & third Discs
VH number of combinations (fail or pass) on both character matches between fourth & third Discs
P number of faces on disc 1 (first Disc)
Q number of orientations adopted by other three discs
X number of faces checked on the second disc 2/3 or 4
Y number of faces checked on the third disc 2/3 or 4
Z number of faces checked on the fourth disc 2/3 or 4
AA$ TO DB$ - definition of Disc/Face as XA and XB strings respectively
B1$ and B2$ - Characters used for comparisonsecond disc LHS 
Cl$ and C2$ - Characterised for comparison second disc Bottom 
D1$ and D2$ - Characterised for comparison third disc Top 
E1$ and E2$ - Characterised for comparison third disc LHS 
F1$ and F2$ - Characterised for comparison fourth disc RHS 
Gl$ and G2$ - Characterised for comparison fourth disc Top 
Hl$ and H2$ - Characterised for comparison first disc Bottom
J$ - string used for definition of orientations
X1$, X2$, X3$, X4$ - strings used to define the different orientations from AA$ to DB$ 
K$, L$, M$, N$ - strings used to define which disc face is visible on each disc for the 
final Solution
ST$ - string variable which holds the time to achieve solution
FT$ - string variable used to hold the time to complete the whole program 
FS - Variable which holds the total number of complete solutions"