X-Git-Url: http://winboard.nl/cgi-bin?p=capablanca.git;a=blobdiff_plain;f=lasker-2.2.3%2Fsrc%2Fmovecheck.c;h=1f6d69b57d6e58354c12b8d00e2f58831279cecb;hp=c0dd853effa9629da1f31b236b18ffc5b9119b5b;hb=b0878c4bb13c5ba03f6defe11f903fa07247b718;hpb=2255d9155bc3e24104ce7a30edeff78fd6b4d53e

diff --git a/lasker-2.2.3/src/movecheck.c b/lasker-2.2.3/src/movecheck.c
index c0dd853..1f6d69b 100644
--- a/lasker-2.2.3/src/movecheck.c
+++ b/lasker-2.2.3/src/movecheck.c
@@ -1303,6 +1303,21 @@ int legal_move(struct game_state_t * gs,
       return 0;
     if (gs->board[tFile][tRank] != NOPIECE)
       return 0;
+    if (gs->promoType == 3) { // Shogi
+      int r;
+      switch(move_piece) {
+	case PAWN:  // check for own Pawn in same file
+	  for(r=0; r<gs->ranks; r++) if(gs->board[tFile][r] == (gs->onMove|PAWN)) return 0;
+	case LANCE: // Pawns and Lances not on last rank
+	  if(gs->onMove == WHITE && tRank >= gs->ranks-1) return 0;
+	  if(gs->onMove == BLACK && tRank < 1) return 0;
+	  break;
+	case HONORABLEHORSE: // Knights at least two ranks from edge
+	  if(gs->onMove == WHITE && tRank >= gs->ranks-2) return 0;
+	  if(gs->onMove == BLACK && tRank < 2) return 0;
+	default: ;
+      }
+    } else
     if (move_piece == PAWN && (tRank == 0 || tRank == gs->ranks-1))
       return 0;
     return 1;