DAMAS

PROBLEMAS E FINAIS

                                               Problemas

                                                           SOLUÇÃO DO PROBLEMA ANTERIOR

                                               Problema 57

                                    

                                               1. f2-g1                                 e1xf6

                                                           2. c5-d6                                e7xe3

                                                           3. g1xa1                               f6xd4
                                                           4. a1xh8                               X.

Temas: Angular Duas Cores e Mate a Descoberto

Problema 58

 Jogam as brancas e ganham

A solução desse problema, veja na próxima postagem

 

                                             Finais

                                                         Final 2

 Jogam as brancas e ganham

                                                            1. e7-d8                                a7-b6

Se 1. ... a1-g7   2. d8-f6 g7xc7   3. b8xe5 X.

Se 1. ... a1-b2, ver Variante 1.

Se 1. ... a1-c3, ver Variante 2.

                                                2. d8xa5                               a1-g7

Se 2. ... a1-d4   3. a5-d8 d4-a1   4. b8-a7!, como no 4º lance, adiante.

                                                           3. a5-d8!                               g7-a1

Se 3. ... g7-d4   4. b8-a7 d4-a1 (se 4. ... d4-g7   5. d6-f8 X; se 4. ... d4-c3   5. d6-b4 c3xa5   6. a7-b6 X; se 4. ... d4-b2   5. a7-e3 b2-a1   6. e3-c1 a1-c3   7. c1-g5 X)   5. a7-e3 a1-b2   6. e3-g5! h8-g7   7. g5-c1! b2-a3   8. d6-f8 X.

Se 3. ... g7-c3   4. b8-a7 c3-a1   5. a7-e3 a1-b2   6. e3-g5! X.

Se 3. ... g7-b2   4. b8-a7 b2-a1   5. a7-e3 X.

                                                           4. b8-a7!                               a1-b2

            Se 4. ... a1-g7   5. d6-f8 g7-h6   6. a7-d4 X.

            Se 4. ... a1-c3   5. d6-b4 X.

                                                           5. a7-e3!                               b2-a1

                                                           6. e3-c1!                               a1-c3

                                                           7. c1-g5!                               c3-a1

            Se 7. ... h8-g7   8. g5-f6 X.

                                                           8. d8-f6!                                a1xg7

                                                           9. d6-f8                                 g7-h6

                                                         10. g5-c1                                h8-g7

                                                         11. f8-c5                                 g7-f6

                                                         12. c5-e3                                X.
 

VARIANTE 1 
 

                                                           1. ...                                        a1-b2

                                                           2. d6-a3                                b2-c1

Se 2. ... b2-c3   3. b8-e5 c3xg7   4. d8-b6 X.

Se 2. ... b2-a1   3. b8-e5 X.

                                                           3. b8-e5                                c1-h6

                                                           4. d8-a5                                h6-c1

           Se 4. ... h6-g7, ver 6º lance da Variante 2.   

           Aqui (retornando ao lance preto h6-c1) está caracterizado o Pé-de-Avestruz. Veja-se, de minha autoria, “O Pé-de-Avestruz e outros ensaios”, p. 49, Diagrama 3.1.

A solução, a seguir, é transcrita das páginas 54-55 desse livro:

                                                           5. e5-b2                                c1-h6

Se 5. ... c1-f4   6. a5-b6 X.

                                                           6. b2-c1                                h6-f8

            Se 6. ... h8-g7   7. a3-e7 g7-f6   8. e7xg5 X.

            Se 6. ... a7-b6   7. a5xd8 h8-g7   8. d8-g5 X.

                                                           7. c1-h6                                h8-g7

                                                           8. a5-b4 e 9. b4-d6 X. 

 

VARIANTE 2
 

                                                           1. ...                                        a1-c3

                                                           2. d6-a3                                c3-d2

Se 2. ... c3-a1   3. b8-e5 X.

Se 2. ... c3-a5   3. b8-e5 a5-e1   4. d8-a5 e1-h4  5. a3-e7 h4xd8   6. e5-c7 d8xb6   7. a5xc7 X.

Se 2. ... c3-e1   3. b8-e5 e1-a5   4. e5-d4 a5-e1   5. d8-a5 e1-h4   6. d4-e5 h4-g5   7. a5-b6 X.

                                                           3. d8-a5                                d2-c1

Se 3. ... d2-e1   4. b8-e5 X.

Se 3. ... d2-h6   4. b8-e5 h6-c1   5. e5-b2, como no 5º lance da Variante 1.

                                                           4. b8-e5                             ...

E transcrevo, agora, a solução (II) do Diagrama 3.1, do livro já citado na Variante 1:

                                                           4. ...                                        c1-h6

                                                           5. e5-f6                                  h6-g7

                                                           6. a3-c5                                 g7xb6

                                                           7. a5xc7                                h8-g7

                                                           8. c7-e5                                 g7-h6

                                                           9. e5-f4                                  a7-b6

                                                         10. f4-e3                                 b6-a5

                                                         11. e3-d2                                X.