13   - 
180'
1   2   3
   
1. 2 (5)   1. 8 (5)   1. 4 (1)                                                 1. ... 2. 6 (1)                      1. ... :4 2. 3 (1)                                    1. ... :4 2. 6+ (1)                                 1. ... 4 2. 2+ (1)
4   5   6
   

1. :7 (1)   2. 6+ 5 3. 3#, 2 ... :6 3# (1)                                            1. ... 5 2. 3+ (1)                                 1. ... :1 2. 6+ (1)                                 1. ... 5 2. 3+ (1)

  1. 5, 2. 7+ 3 3. 3, 2 ... 4 3. 6 (1)                                                1. 2, 2. 6 3. 3#                      2 ... 2 3. 5+ (0,5)                                  2 ... 4 3. 4+ (0,5)                               1. ... 1 2. 2+ 4 3. 3+ (1)                 1. ... 3 2. 5+ 2 3. 2+ (1)               1. ... 4 2. 6+ 4 3. 7+ (1)   1. 6 (1)                                                 1. ... 6 2. 5 5 3. 6 4 4. 7 3 5. 8 (2)   1. ... 5 2. 5 4 3. 4 3 4. 3+ 1 5. 3 (2)
7   8   9
   
1. 4+ 1 2. 3 2 3. 2 (2) 3+ 4. 8 :2 5. :2 1 6. 1 :1 (3)   1. 8 (1) 7+ 2. :7 1 3. 6 (2) 1 4. 7 (1) 3 5. 1+ 1 6. 3+ (1)   1. 5 7 2. 4 :5 3. 5 :3 # (2)          1. 5 :3 2. 3 :3 3. 4 :4 # (2)      1. 7 8 2. 5 :7 3. 6 5 # (1)
10   11   12
   
1. 5 2+ 2. 1 2 3. 2 6 4. 2 5 5. 3 1 # (2,5)                                    1. 3 1+ 2. 2 2 3. 3 1+ 4. 4 2 5. 4 4 # (2,5)   1. 4 (1)  zugzwang                                1. ... :1 2. 3+ 5 3. 3+ (1)              1. ... :1 2. 3+ 5 3. 4+ (1)            1. ... 5 2. 4 zugzwang 2. ... :1 3. 3+ (0,5) 2. ... :1 3. 3+ (0,5)                    1. ... 5 2. 8 zugzwang 2. ... :1 3. 3+ (0,5) 2. ... :1 3. 4+ (0,5)   1. 4 (1)  zugzwang                                1. ... 4 2. 6+ 6 3. :5+ 5(:5) 4. 8 :5(5) 5. 4 (2)                                  1. ... :4+ 2. 3+ 6 3. 8 5 4. :5 :5 5. 4 (2)