diff --git a/MisaMinoNET/MisaMino/tetris_ai.cpp b/MisaMinoNET/MisaMino/tetris_ai.cpp
index 26084f9..1365f93 100644
--- a/MisaMinoNET/MisaMino/tetris_ai.cpp
+++ b/MisaMinoNET/MisaMino/tetris_ai.cpp
@@ -467,8 +467,8 @@ namespace AI {
                         int s = 0;
                         s -= int( warning_factor * ai_param.tspin3 );
                         score += s;
-                        if ( y <= pool_h - 3 && ( pool.row[y + 3] & ( 1 << x ) ) == 0 ) {
-                            int r = ~pool.row[y + 3] & pool.m_w_mask;
+                        if ( y <= pool_h - 3 && ( pool.row[y + 2] & ( 1 << x ) ) == 0 ) {
+                            int r = ~pool.row[y + 2] & pool.m_w_mask;
                             if ( ( r & ( r - 1 ) ) == 0 ) {
                                 score -= int( warning_factor * (ai_param.tspin * 4 + ai_param.open_hole) );
                             }
@@ -551,8 +551,8 @@ namespace AI {
                         int s = 0;
                         s -= int( warning_factor * ai_param.tspin3 );
                         score += s;
-                        if ( y <= pool_h - 3 && ( pool.row[y + 3] & ( 1 << x ) ) == 0 ) {
-                            int r = ~pool.row[y + 3] & pool.m_w_mask;
+                        if ( y <= pool_h - 3 && ( pool.row[y + 2] & ( 1 << x ) ) == 0 ) {
+                            int r = ~pool.row[y + 2] & pool.m_w_mask;
                             if ( ( r & ( r - 1 ) ) == 0 ) {
                                 score -= int( warning_factor * (ai_param.tspin * 4 + ai_param.open_hole) );
                             }