From: H.G.Muller
Date: Thu, 14 Jan 2016 18:16:50 +0000 (+0100)
Subject: Use ii in Betza notation for 3rd-rank Pawn push
X-Git-Url: http://hgm.nubati.net/cgi-bin/gitweb.cgi?p=xboard.git;a=commitdiff_plain;h=689d4bda4200571b46b0f4ae3b6c537ab8633557
Use ii in Betza notation for 3rd-rank Pawn push
The 'i' modifier specifies the move is only for virgin pieces. We now
use 'ii' to indicate a move that can be made when the piece is standing
on the square in front of that were such a piece starts in the initial
setup. This is intended for Pawns that can still be pushed extra far
after they have made a first single step, such as in Wildebeest Chess,
where pawns on 2nd rank can move 1, 2 or 3 squares ahead, and on 3rd rank
can still move 1 or 2 (fmWifmW3iifmW2).
---
diff --git a/moves.c b/moves.c
index 1e9ba9e9..01444865 100644
--- a/moves.c
+++ b/moves.c
@@ -287,7 +287,7 @@ MovesFromString (Board board, int flags, int f, int r, int tx, int ty, int angle
while(*p) { // more moves to go
int expo = 1, dx, dy, x, y, mode, dirSet, ds2=0, retry=0, initial=0, jump=1, skip = 0, all = 0;
char *cont = NULL;
- if(*p == 'i') initial = 1, desc = ++p;
+ while(*p == 'i') initial++, desc = ++p;
while(islower(*p)) p++; // skip prefixes
if(!isupper(*p)) return; // syntax error: no atom
dx = xStep[*p-'A'] - '0';// step vector of atom
@@ -372,6 +372,7 @@ MovesFromString (Board board, int flags, int f, int r, int tx, int ty, int angle
if(isdigit(*++p)) expo = atoi(p++); // read exponent
if(expo > 9) p++; // allow double-digit
desc = p; // this is start of next move
+ if(initial == 2) { if(board[r][f] != initialPosition[r-2*his+3][f]) continue; } else
if(initial && (board[r][f] != initialPosition[r][f] ||
r == 0 && board[TOUCHED_W] & 1<