commit f60960a68551a765be30b6012e6f8bf4965c3bab
parent a664a7d86033b4f3061dcb8ca74cd022e9c28c97
Author: benjamin paul <bpaul@bpaul.xyz>
Date: Sun, 24 Oct 2021 19:33:51 +1000
i had to transfer files sorry
Diffstat:
2 files changed, 37 insertions(+), 0 deletions(-)
diff --git a/src/gen.c b/src/gen.c
@@ -3,6 +3,41 @@
#include "bb.h"
#include "pos.h"
+/* Todo for writing a move generator:
+ *
+ * Create a method for storing a move
+ * Get the attacks for the pieces
+ * Iterate through each piece and create each move based on their attacks
+ * For pawns, cry
+ * For castling, cry */
+
+/* Move structure
+ * want a move to be relatively simple to store as we will be making a list of
+ * moves
+ * needed information:
+ * from square
+ * to square
+ * promotion piece
+ * helpful to have information:
+ * whether the move is en passant or castling
+ * maybe if it is castling what type of castling
+ *
+ * from is 6 bits
+ * to is 6 bits
+ * movetype is 2 bits
+ * promotion piece is 2 bits OR castling type is 2 bits!
+ * thats 16 bits total
+ * 00 promotion/castling bits
+ * 00 move type
+ * 000000 to square
+ * 000000 from square
+ */
+
+unsigned short
+storemove(char from, char to, char movetype, char extra) {
+ return from + (to << 6) + (movetype << 12) + (extra << 14);
+}
+
void
gen_pseudo(pos *p) {
bb our_pieces[6];
diff --git a/src/pos.c b/src/pos.c
@@ -161,6 +161,8 @@ print_board(pos *p) {
int r,c;
for (r = 7; r >= 0; r--) {
for (c = 0; c <= 7; c++) {
+ /* This is a funky string index lookup thing where the piece at the
+ * current square is the index in the string */
putchar("pnbrqk PNBRQK."[p->mailbox[square(r,c)]]);
}
puts("");
