ZX81 1K Chess

ZX81

Modern

sinclair ZX81

_ _ → _ _

Your turn

1 EDIT DEF FN

2 CAPS

3 TRUE V

4 INV V

5 ←

6 ↓

7 ↑

8 →

9 GRAPH

0 DELETE

PLOT Q "" SIN

UNPLOT W OR COS

REM E STEP TAN

RUN R ≤ INT

RAND T ≠ RND

RETURN Y AND STR$

IF U $ CHR$

INPUT I ( CODE

POKE O ) PEEK

PRINT P " TAB

NEW A STOP ASN

SAVE S LPRINT ACS

DIM D SLOW ATN

FOR F FAST SGN

GOTO G LLIST ABS

GOSUB H ** SQR

LOAD J − VAL

LIST K + LEN

LET L = USR

NEW LINE FUNCTION

SHIFT

COPY Z : LN

CLEAR X ; EXP

CONT C ? AT

CLS V / NOT

SCROLL B * π

NEXT N < INKEY$

PAUSE M >

. ,

SPACE £ BREAK

Your move