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	add option to not highlight the last played move or checks or checkmates - ches…
	git clone git://git.codemadness.org/chess-puzzles
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	---
	commit b157d49005e4d9fd2e5e979b72a1e222e21fdec3
	parent 52d9636da4a82de476f21b1c61de8b7570f96c92
	Author: Hiltjo Posthuma <[email protected]>
	Date: Thu, 29 Feb 2024 19:02:30 +0100

	add option to not highlight the last played move or checks or checkmates

	This is better for puzzles/training. Sometimes the last played move gives a
	hint of a blunder etc.

	This adds an extra challenge to analyze more properties of the position.

	Diffstat:
	M fen.1 \| 8 ++++++--
	M fen.c \| 20 +++++++++++++-------

	2 files changed, 19 insertions(+), 9 deletions(-)
	---
	diff --git a/fen.1 b/fen.1
	@@ -1,4 +1,4 @@
	-.Dd January 14, 2024
	+.Dd February 29, 2024
	.Dt FEN 1
	.Os
	.Sh NAME
	@@ -6,7 +6,7 @@
	.Nd parses chess FEN, plays moves and writes output
	.Sh SYNOPSIS
	.Nm
	-.Op Fl cCfF
	+.Op Fl cCfFhH
	.Op Fl l
	.Op Fl m mapping
	.Op Fl o Ar ascii \| fen \| pgn \| speak \| svg \| tty
	@@ -34,6 +34,10 @@ Disable board coordinates.
	Flip the board, default is off.
	.It Fl F
	Do not flip the board.
	+.It Fl h
	+Highlight the last played move and checks or checkmates.
	+.It Fl H
	+Do not highlight the last played move and checks or checkmates.
	.It Fl l
	For PGN and speak mode only output the last move.
	For PGN this will not prefix the move number.
	diff --git a/fen.c b/fen.c
	@@ -100,6 +100,7 @@ struct board {

	int flipboard; /* flip board ? default: 0 */
	int showcoords; /* board coordinates? default: 1 */
	+ int highlights; /* highlight moves and checks? default: 1 */
	struct theme theme; / board theme */
	};

	@@ -129,6 +130,7 @@ board_init(struct board *b)
	b->movenumber = 1;
	b->flipboard = 0;
	b->showcoords = 1;
	+ b->highlights = 1;
	b->theme = &themes[0]; /* use first theme as default */
	}

	@@ -1388,13 +1390,15 @@ board_playmoves(struct board b, const char moves)
	}

	/* highlight last move */
	- highlightmove(b, x, y);
	- highlightmove(b, x2, y2);
	-
	- /* highlight king in check or mate */
	- if (isincheck(b, b->side_to_move) &&
	- findking(b, b->side_to_move, &x, &y))
	- highlightcheck(b, x, y);
	+ if (b->highlights) {
	+ highlightmove(b, x, y);
	+ highlightmove(b, x2, y2);
	+
	+ /* highlight king in check or mate */
	+ if (isincheck(b, b->side_to_move) &&
	+ findking(b, b->side_to_move, &x, &y))
	+ highlightcheck(b, x, y);
	+ }
	}

	void
	@@ -1600,6 +1604,8 @@ main(int argc, char *argv[])
	case 'd': dutchmode = 1; break; /* top secret dutch mo…
	case 'f': board.flipboard = 1; break;
	case 'F': board.flipboard = 0; break;
	+ case 'h': board.highlights = 1; break;
	+ case 'H': board.highlights = 0; break;
	case 'l': onlylastmove = 1; silent = 1; break;
	case 'm': /* remap PGN */
	if (i + 1 >= argc)