3 files changed, 59 insertions, 2 deletions

diff --git a/events.txt b/events.txt
index 15ac6d8..4316caa 100644
--- a/events.txt
+++ b/events.txt
@@ -336,7 +336,9 @@ SHADED 20
 	endspace
 
 EVENT 21
-	log "NOT IMPLEMENTED"
+	current REBEL_FACTIONS
+	prompt "Move any Troops from Gondwana and Madhyadesh to Delhi."
+	move_to S_DELHI (is_troop(p) && (piece_space(p) === S_GONDWANA || piece_space(p) === S_MADHYADESH))
 
 SHADED 21
 	log "NOT IMPLEMENTED"
diff --git a/rules.js b/rules.js
index 1e81e63..4e0f149 100644
--- a/rules.js
+++ b/rules.js
@@ -2602,6 +2602,10 @@ function is_ds_unit(p) {
 	return (is_piece(p, DS, ELITE) || is_piece(p, DS, TROOPS))
 }
 
+function is_troop(p) {
+	return piece_faction(p) === DS && piece_type(p) === TROOPS
+}
+
 function is_governor(p) {
 	return piece_faction(p) === DS && piece_type(p) === ELITE
 }
@@ -3818,6 +3822,51 @@ function is_piece_in_event_space(p) {
 	return piece_space(p) === game.vm.s
 }
 
+// VM: MOVE PIECE
+
+function vm_move_to() {
+	push_summary()
+	game.state = "vm_move_to"
+}
+
+function vm_can_move_to(f) {
+	for (let p = all_first_piece; p <= all_last_piece; ++p)
+		if (f(p))
+			return true
+	return false
+}
+
+states.vm_move_to = {
+	prompt() {
+		let f = vm_inst(2)
+
+		event_prompt()
+		for (let p = all_first_piece; p <= all_last_piece; ++p)
+			if (f(p))
+				gen_action_piece(p)
+
+		view.actions.skip = 1
+	},
+	piece(p) {
+		log_summary_place(p)
+		place_piece(p, vm_inst(1))
+
+		if (!vm_can_move_to(vm_inst(2)))
+			end_vm_move_to(vm_inst(1))
+	},
+	skip() {
+		end_vm_move_to(vm_inst(1))
+	}
+}
+
+function end_vm_move_to(s) {
+	if (game.summary && game.summary.length > 0) {
+		log_space(vm_inst(1), "Move")
+		pop_summary()
+	}
+	vm_next()
+}
+
 // VM: PLACE PIECE
 
 function vm_auto_place() {
@@ -4570,7 +4619,9 @@ CODE[20 * 2 + 1] = [
 
 // EVENT 21
 CODE[21 * 2 + 0] = [
-	[ vm_log, "NOT IMPLEMENTED" ],
+	[ vm_current, REBEL_FACTIONS ],
+	[ vm_prompt, "Move any Troops from Gondwana and Madhyadesh to Delhi." ],
+	[ vm_move_to, S_DELHI, (p,s)=>(is_troop(p) && (piece_space(p) === S_GONDWANA || piece_space(p) === S_MADHYADESH)) ],
 	[ vm_return ],
 ]
 
diff --git a/tools/gencode.js b/tools/gencode.js
index e70794e..fb111bc 100644
--- a/tools/gencode.js
+++ b/tools/gencode.js
@@ -105,6 +105,10 @@ for (let line of fs.readFileSync("events.txt", "utf-8").split("\n")) {
 		emit([ "shipment", false, 0, line[1], "(p,s)=>" + line.slice(2).join(" ") ])
 		break
 
+	case "move_to":
+		emit([ "move_to", line[1], "(p,s)=>" + line.slice(2).join(" ") ])
+		break
+
 	case "place":
 		emit([ "place", false, 0, line[1], line[2], line[3] ])
 		break