support explicitly winning and implement Approach Supremacy!

1 files changed, 10 insertions, 0 deletions

diff --git a/go/game/stack.go b/go/game/stack.go
index 4d2a056e..bb93f40c 100644
--- a/go/game/stack.go
+++ b/go/game/stack.go
@@ -21,6 +21,16 @@ func (s *Stack) push(a Action) {
 	s.Actions = append(s.Actions, a)
 }
 
+func (s *Stack) remove(a Action) {
+	for i, o := range s.Actions {
+		if o != a {
+			continue
+		}
+		s.Actions = append(s.Actions[:i], s.Actions[i+1:]...)
+		return
+	}
+}
+
 func (s *Stack) pop() {
 	l := len(s.Actions)
 	if l == 0 {