PROBLEMAS + O “PÉ-DE-AVESTRUZ” (IV)

PARTE 2

PARTE 1 Sumário (ver postagem de DEZ.2014)

                  Problemas

                                                           SOLUÇÃO DO PROBLEMA ANTERIOR

                                              Problema 89

                                                           1. d6-e7                                 f8xg3

            Se 1. ... f8xb4   2. e1xh4 X.

            Se 1. ... f8xf4   2. b8xg3 a3xf8  (se 2. ... a3xe7   3. e1-c3 X)  3. g3-h4 g5-f4   4. h2xe5 X.

            Se 1. ... a3xg3   2. h2xh6 f8xd6   3. e1-a5 d6-h2   4. a5xd8 X.

            Se 1. ... a3xf4   2. b8xg3 f8xa3/c5  3. g3-h4 X.

                                                           2. e1xa5                                X.

Temas: Cavilha Dama Branca, Espelho e Finta 

90

 Jogam as brancas e ganham

A solução desse problema, veja na próxima postagem

O “PÉ-DE-AVESTRUZ” (IV)

1.2 O “Pé-de-Avestruz”
e uma Dama e a dupla de pedras ─ II

2.2

                                                                                  I

                                                           1. e5-c3                                 c1-f4

                                                           2. a7-e3                                 f4xb4

                                                           3. a3xc5                                f8-g7

                                                           4. c5-d4                                g7-h6

                                                           5. d4-c3                                h6-g5

                                                           6. c3-d2                                g5-h4

                                                           7. d2-e1                                X.

                                                                                  II

                                                           1. ...                                       c1-g5

                                                           2. e5-a1                                 g5-c1

            Se 2. ... g5-d8   3. a7-e3 d8-c7   4. a3-b4 X.

                                                           3. a7-g1                                 c1-h6

                                                           4. a3-c1                                 X.

2.3

                                                       I

                                                           1.e5-a1                                  h6-c1

            Se 1. ... h6-f4   2. a3-b4 X.

                                                           2. a1-c3                                 c1-f4

                                                           3. a7-e3                                 X.

                                                                                  II

                                                           1. ...                                        h6-g7

            Se 1. ... h6-c1   2. e5-c3 X.

            Se 1. ... h6-g5   2. a3-e7 g5xd8   3. e5-c7 X.

                                                           2. a3-c5                                  g7xb6

                                                           3. a7xd4                                 X.

2.4

         Com a Dama em g5:

                                                       I

                                                           1. a3-c1                                 g5-e7

                                                           2. e5-f6                                  X.

                                                                                  II

                                                           1. ...                                        g5-c1

            Se 1. ... a5-b4   2. a3xc5   h4-g3   3. e5xh2 g5-f6   4. h2-e5 X.

            Se 1. ... g5-h6   2. e5-g7 h6xf8   3. a7-c5 f8xb4   4. a3xd6 X.

            Se 1. ... h4-g3   2. e5xh2 g5-f6   3. a3-e7 X.

                                                           2. a7-c5                                 c1-d2

            Se 2. ... c1-g5   3. e5-f6 g5xb4   4. a3xd6 X.

            Se 2. ... a5-b4   3. c5-d4 X.

                                                           3. a3-c1                                 d2-e1

                                                           4. c5-d4                                 e1-b4

                                                           5. c1-a3                                 X.

         Com a Dama em c1:

                                                                                  I

                                                           1. a7-c5

e ganham as brancas, como em Com a Dama em g5 (II), lance 2.

                                                                                  II

           

            Observação ─ Aqui, o lance inicial não pode ser das pretas, pois, com o sacrifício das duas pedras, elas conseguem o empate. 

3.1

                                                                 I

                                                           1. e5-b2                                c1-h6

            Se 1. ... c1-f4   2. a5-b6 X.

                                                           2. b2-c1                                h6-f8

            Se 2. ... h8-g7   3. a5-b6 a7xc5   4. a3xe7 X.

            Se 2. ... a7-b6   3. a5xd8 h8-g7  (se 3. ... h6-g7   4. c1-h6 X)  4. d8-g5 X.

                                                           3. c1-h6                                h8-g7

                                                           4. a5-b4                                a7-b6

                                                           5. b4-d6                                f8xb4

                                                           6. a3xa7                                X.

                                                                                  II

                                                           1. ...                                        c1-h6

                                                           2. e5-f6                                  h6-g7

                                                           3. a3-c5                                 g7xb6

                                                           4. a5xc7                                h8-g7

                                                           5. c7-e5                                 g7-h6

                                                           6. e5-f4                                  a7-b6

                                                           7. f4-e3                                  b6-a5

                                                           8. e3-d2                                X.

            Observação ─ Com a Dama em h6 o ganho é bem fácil: 1. e5-f6, etc X.

4.1

         Com a Dama em a5:

            Observação ─ O primeiro lance não pode ser das pretas...

                                                           1. d4-e5                                a5-e1

            Se 1. ... b8-c7   2. e5xb8 a5-c3   3. d8-b6 X.

            Se 1. ... a7-b6   2. e5-d4 b8-c7  (se 2. ... b8-a7   3. d4-e5 a5-e1   4. d8xa5 X)  3. d4xa7 c7-d6   4. f8xc5 a5-c3   5. c5-b4 X.

                                                           2. e5-f6                                 e1-a5

                                                           3. f8-d6                                 a7-b6

            Se 3. ... a5-d2   4. d6-f4 X.

                                                           4. d8-e7                                b8-a7

            Se 4. ... a5-d2/e1   5. d6-c5/g3 X.

                                                           5. e7-d8                                a5-e1

                                                           6. d8xa5                               e1-h4

                                                           7. d6-c7                                X.

            Com a Dama em h6:

                                                                                   I

                                                           1. d4-b2                                h6-c1

                                                           2. d8-a5                                X.

                                                                                  II

                                                           1. ...                                        h6-c1

                                                           2. d4-g7                                c1-a3

                                                           3. d8-a5                                a3-c1

                                                           4. g7-b2                                X.

            Observação ─ Com a Dama em c1 as pretas perdem facilmente: 1. d4-c3 c1-h6   2. c3-b2, etc X. Quando 1. ... c1-h6   2. d4-b2, etc X.

4.2

         Com a Dama em c1:

                                                           1. d4-c3                                b8-a7

            Se 1. ... c1-h6   2. c3-b2 h6-c1  (se 2. ... b8-a7   3. b2-c1 X)   3. b2-a3 b8-a7   4. f8-h6 X. 

                                                           2. c3-e5                                 c1-h6

                                                           3. e5-b2                                h6-c1

                                                           4. b2-a3                                c1-h6

                                                           5. a3-c1                                 h8-g7

                                                           6. d8-g5                                h6xd2

                                                           7. c1xe3                                X.

            Com a Dama em e1:

                                                                                  I

                                                           1. f8-b4                                 e1xa5

                                                           2. d4-b6                                a5xc7

                                                           3. d8xb6                               h8-g7

                                                           4. b6-d4                                g7-h6

                                                           5. d4-e3                                b8-a7/c7

                                                           6. e3-f4                                 a7/c7-b6

                                                           7. f4-e3                                 b6-a5

                                                           8. e3-d2                                X.

                                                                                  II

                                                           1. ...                                       b8-a7

                                                           2. f8-a3                                 e1-a5

            Se 2. ... e1-g3   3. d4-b6 X.

                                                           3. a3-d6                                a7-b6

            Se 3. ... a5-d2   4. d4-b6 X.

                                                           4. d4xa7                               a5-c3

                                                           5. d6-b4                                X.

4.3

         Com a Dama em e1:

                                                                                  I

                                                           1. f8-b4                                 e1xa5

                                                           2. d4-b6                                a5xc7

                                                           3. d8xb6                               h6-g5

                                                           4. b6-e3                                g5-h4

                                                           5. e3-f4                                 b8-a7

                                                           6. f4-c7                                 X.

                                                                                  II

                                                           1. ...                                       b8-a7

                                                           2. d4-e5                                e1-a5

                                                           3. f8-e7                                 a5-e1

            Se 3. ... a7-b6   4. e5-h8 X.

                                                           4. d8-a5                                e1-h4

                                                           5. e5-c7                                h4xb6

                                                           6. a5xd8                               X.

            Com a Dama em c1:

                                                                                  I

                                                           1. d4-e3                                c1xf4

                                                           2. f8-d6                                 f4xc7

                                                           3. d8xb6                               h6-g5

                                                           4. b6-e3                                g5-h4

                                                           5. e3-f4                                 b8-a7

                                                           6. f4-c7                                 X.

                                                                                  II

                                                           1. ...                                        b8-a7

                                                           2. f8-a3                                  X.

5.1

          

                                                                                  I

                                                           1. d4-f6                                 h6-e3

                                                           2. b8-f4                                 X.

                                                                                  II

                                                           1. ...                                        h6-c1

                                                           2. d4-b2                                c1xa3

                                                           3. b8-d6                                X.

5.2

         Com a Dama em a5:

                                                                                  I

                                                           1. d4-h8                                a5-b6

            Se 1. ... a7-b6   2. b8-a7 X.

                                                           2. b8-e5                                b6-e3

            Se 2. ... b6-a5   3. f8-b4 X.

                                                           3. e5-c7                                 d8xb6

                                                           4. h8-d4                                X.

                                                                                  II

                                                           1. ...                                        a7-b6

            Se 1. ... d8-e7   2. f8xc5 X.

            Se 1. ... d8-c7   2. b8xe5 X.

            Se 1. ... a5-d2   2. d4-b6 X.

            Se 1. ... a5-e1   2. b8-g3 e1xh4   3. d4-f6 X.

            Se 1. ... a5-b6   2. d4-h8 b6-a5  (se 2. ... b6-g1   3. b8-c7   4. h8-d4 X)  3. b8-e5 a5-d2  (se 3. ... a7-b6   4. f8-b4 X)  4. f8-e7 d8xd4   5. h8xe1 X.

                                                           2. d4xa7                               d8-e7

            Se 2. ... a5-c3   3. b8-c7 X.

                                                           3. f8xd6                                a5-c3

                                                           4. a7-d4                                X.

         Com a Dama em h6:

                                                                                  I

                                                           1. d4-f6                                 a7-b6

                                                           2. b8-a7                                b6-a5

                                                           3. a7-b8                                h6-e3

                                                           4. b8-f4                                 X.

                                                                                  II

            Observação ─ Aqui, o lance inicial não pode ser das pretas, porque: 1 ... d8-e7!   2. f8xc5  (2. f8xa3 a7-b6   3. d4xa7 h6-g7 com empate)  h6-f8!   3. c5-a3 a7-b6   4. d4xa7 f8-g7 com empate.                               

(CONTINUA)