diff --git a/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/interactors/ModifyPsychomatrixUseCaseInteractor.kt b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/interactors/ModifyPsychomatrixUseCaseInteractor.kt
index 05487d8..f16e7ba 100644
--- a/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/interactors/ModifyPsychomatrixUseCaseInteractor.kt
+++ b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/interactors/ModifyPsychomatrixUseCaseInteractor.kt
@@ -46,7 +46,7 @@ class ModifyPsychomatrixUseCaseInteractor : ModifyPsychomatrixUseCase {
 
     private fun asMutablePsychomatrix(psychomatrix: Psychomatrix): MutablePsychomatrix {
         return currentPsychomatrixes.firstOrNull {
-            it == psychomatrix
+            it.date == psychomatrix.date
         } ?: MutablePsychomatrix(psychomatrix).also {
             currentPsychomatrixes.add(it)
         }
diff --git a/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/presentation/presenters/DefaultRealisations/ModifyPsychomatrixPresenterImpl.kt b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/presentation/presenters/DefaultRealisations/ModifyPsychomatrixPresenterImpl.kt
index 1e75a81..703a84e 100644
--- a/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/presentation/presenters/DefaultRealisations/ModifyPsychomatrixPresenterImpl.kt
+++ b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/presentation/presenters/DefaultRealisations/ModifyPsychomatrixPresenterImpl.kt
@@ -33,6 +33,10 @@ class ModifyPsychomatrixPresenterImpl(
         return modifyPsychomatrixUseCase.openPsychomatrixChangedSubscription()
     }
 
+    override suspend fun tryToDoOperation(psychomatrix: Psychomatrix, operation: Operation): Deferred<Boolean> {
+        return modifyPsychomatrixUseCase.makeConvert(psychomatrix, operation)
+    }
+
     override suspend fun twoGrowFourAvailable(psychomatrix: Psychomatrix): Deferred<Boolean> {
         return async {
             (availableConverts[psychomatrix] ?: updateConvertsOfPsychomatrix(psychomatrix)).contains(TwoGrowFour)
diff --git a/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/presentation/presenters/ModifyPsychomatrixPresenter.kt b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/presentation/presenters/ModifyPsychomatrixPresenter.kt
index 34b37ca..62e359e 100644
--- a/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/presentation/presenters/ModifyPsychomatrixPresenter.kt
+++ b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/presentation/presenters/ModifyPsychomatrixPresenter.kt
@@ -11,6 +11,8 @@ interface ModifyPsychomatrixPresenter {
 
     fun openPsychomatrixChangedSubscription(): ReceiveChannel<PsychomatrixOperationIsConvert>
 
+    suspend fun tryToDoOperation(psychomatrix: Psychomatrix, operation: Operation): Deferred<Boolean>
+
     suspend fun twoGrowFourAvailable(psychomatrix: Psychomatrix): Deferred<Boolean>
     suspend fun fourGrowTwoAvailable(psychomatrix: Psychomatrix): Deferred<Boolean>