made en passant, there might be bugs but I haven't found them yet

3 files changed, 80 insertions, 12 deletions

diff --git a/public/board.js b/public/board.js
index bd39363..785efff 100644
--- a/public/board.js
+++ b/public/board.js
@@ -56,8 +56,7 @@ function handle_move(from_id, to_id) {
         prev_y_x.push([from_y, from_x])
         new_y_x.push([to_y, to_x])
 
-        if(Math.abs(from) == 1 && to == 0){
-            console.log("valid")
+        if (Math.abs(from) == 1 && to == 0) {
             if (castle_white_short && from_color && to_y == 7 && to_x == 6) { //white short
                 prev_y_x.push([7, 7])
                 new_y_x.push([7, 5])
@@ -101,6 +100,24 @@ function handle_move(from_id, to_id) {
 
         make_move(board, prev_y_x, new_y_x)
 
+        if (en_passant_move >= 0) {
+            if (from_color) {
+                let passanted_pawn = document.getElementById(`3${en_passant_move}`)
+
+                while (passanted_pawn.firstChild) {
+                    passanted_pawn.removeChild(passanted_pawn.firstChild)
+                }
+            } else {
+                let passanted_pawn = document.getElementById(`4${en_passant_move}`)
+
+                while (passanted_pawn.firstChild) {
+                    passanted_pawn.removeChild(passanted_pawn.firstChild)
+                }
+            }
+
+            en_passant_move = -1
+        }
+
         let from_element = document.getElementById(from_id)
         let to_element = document.getElementById(to_id)
 
diff --git a/public/make_move.js b/public/make_move.js
index 6233ed0..07bda02 100644
--- a/public/make_move.js
+++ b/public/make_move.js
@@ -12,27 +12,58 @@
 
 function make_move(board, prev_y_x, new_y_x) {
 
+    if ((board[prev_y_x[0][0]][prev_y_x[0][1]] == 6 || board[prev_y_x[0][0]][prev_y_x[0][1]] == -6) && board[new_y_x[0][0]][new_y_x[0][1]] == 0 && new_y_x[0][1] != prev_y_x[0][1]) {
+        console.log("passant")
+        console.log(en_passant)
+
+        if (board[prev_y_x[0][0]][prev_y_x[0][1]] == 6) {
+            board[3][en_passant] = 0
+        } else {
+            board[4][en_passant] = 0
+        }
+
+        en_passant_move = en_passant
+    }
+
+    en_passant = -1
+
     for (let i = 0; i < new_y_x.length; i++) {
+        if (board[prev_y_x[i][0]][prev_y_x[i][1]] == 6 && prev_y_x[i][0] - new_y_x[i][0] == 2) {
+            en_passant = prev_y_x[i][1]
+        }
+
+        if (board[prev_y_x[i][0]][prev_y_x[i][1]] == -6 && prev_y_x[i][0] - new_y_x[i][0] == -2) {
+            en_passant = prev_y_x[i][1]
+        }
+
+
         board[new_y_x[i][0]][new_y_x[i][1]] = board[prev_y_x[i][0]][prev_y_x[i][1]]
     }
 
     for (let i = 0; i < prev_y_x.length; i++) {
         let color = board[prev_y_x[i][0]][prev_y_x[i][1]] > 0
 
-        if(Math.abs(board[prev_y_x[i][0]][prev_y_x[i][1]]) == 1){
-            if(color) castle_white_short = castle_white_long = false
+        if (Math.abs(board[prev_y_x[i][0]][prev_y_x[i][1]]) == 1) {
+            if (color) castle_white_short = castle_white_long = false
             else castle_black_short = castle_black_long = false
-        } else if(Math.abs(board[prev_y_x[i][0]][prev_y_x[i][1]]) == 3){
-            if(prev_y_x[i][1] == 0){
-                if(color) castle_white_long = false
+        } else if (Math.abs(board[prev_y_x[i][0]][prev_y_x[i][1]]) == 3) {
+            if (prev_y_x[i][1] == 0) {
+                if (color) castle_white_long = false
                 else castle_black_long = false
-            } else if (prev_y_x[i][1] == 7){
-                if(color) castle_white_short = false
+            } else if (prev_y_x[i][1] == 7) {
+                if (color) castle_white_short = false
                 else castle_black_short = false
             }
         }
 
         board[prev_y_x[i][0]][prev_y_x[i][1]] = 0
     }
+
+    check = check_check(board, to_move, check)
+    if (check) {
+        console.log("check")
+    }
+
+    console.log(board)
 }
 
diff --git a/public/move.js b/public/move.js
index 87de976..294ace5 100644
--- a/public/move.js
+++ b/public/move.js
@@ -15,12 +15,14 @@ let check = false
 //console.log(board[7][1])
 //console.log(move(board, 4, 4, to_move))
 
-
 let castle_white_short = true
 let castle_white_long = true
 let castle_black_short = true
 let castle_black_long = true
 
+let en_passant = -1
+let en_passant_move = -1
+
 function check_check(board, to_move, check) {
     let king_position = []
 
@@ -160,6 +162,24 @@ function pawn_move(board, y, x) {
         }
     }
 
+    if (en_passant > 0 && color && y == 3) {
+        if (x - 1 == en_passant) {
+            moves.push([2, x - 1])
+        }
+        if (x + 1 == en_passant) {
+            moves.push([2, x + 1])
+        }
+    }
+
+    if (en_passant > 0 && !color && y == 4) {
+        if (x - 1 == en_passant) {
+            moves.push([5, x - 1, 1])
+        }
+        if (x + 1 == en_passant) {
+            moves.push([5, x + 1, 1])
+        }
+    }
+
     return moves
 }
 
@@ -168,7 +188,7 @@ function king_move(board, y, x) {
     let moves = []
 
     let controlled = controlled_squares(board, to_move)
-    
+
     for (let i = y - 1; i <= y + 1; i += 1) {
         for (let j = x - 1; j <= x + 1; j += 1) {
             if ((i == y && j == x) || i < 0 || j < 0 || i >= board.length || j >= board[i].length) {
@@ -179,7 +199,7 @@ function king_move(board, y, x) {
             }
         }
     }
-    
+
     if (color && castle_white_short && board[7][6] == 0 && board[7][5] == 0) {
         for (let i = 0; i < controlled.length; i++) {
             if ((controlled[i][0] == 7 && controlled[i][1] == 6) || (controlled[i][0] == 7 && controlled[i][1] == 5)) {