sábado, 19 de dezembro de 2015

PROBLEMAS + O “PÉ-DE-AVESTRUZ” (VII)


2016FelizAnoNovo2016


  
PARTE 2
PARTE 1 Sumário (ver postagem de DEZ.2014)

   
                  Problemas

                                                            SOLUÇÃO DO PROBLEMA ANTERIOR

                                              Problema 92

                                                           1. d4-c5                                c3xa1
                                                           2. b6-a7                                a1-e5
            Se 2. ... a1-c3   3. g3-h2 X.
                     Se 2. ... a1-h8   3. g3-h2  b8xg3   4. h2xe5 X.
                                                           3. f4xd6                                b8xh2
                                                           4. a7-b8                                X.
                                                          
Temas: Bloqueio nas Paralelas, Cavilha Dama Branca e Mate Cruzado

93
Jogam as brancas e ganham

A solução desse problema, veja na próxima postagem


O “PÉ-DE-AVESTRUZ” (VII)
1.3 O “Pé-de-Avestruz”
(com estrutura atípica)
e uma Dama e duas pedras

            Examine bem a série de diagramas adiante (com exceção do primeiro diagrama), e veja que a forma triangular do Pé-de-Avestruz continua a mesma, porém a estrutura é outra.
            O vértice continua inalterado, porém a base, não. A base ─ neste item 1.3 ─ tem sempre duas pedras; e uma Dama branca se desloca da base para a casa vazia mais próxima do vértice.

NOTA
            O Diagrama 1 já foi publicado, nesta seção do blog, em ABR de 2011, com o título O PÉ-DE-AVESTRUZ ─ VII ─ Apêndice II da Parte VI de “O Pé-de-Avestruz”. Clique aqui.

1

2
Pé-de-Avestruz: estrutura atípica

         Com a dama em d8:

                                                           1. e5-a1                                d8-b6
            Se 1. ... d8-g5   2. a1-f6 X.
                                                           2. c5-g1                                b6-d8
                                                           3. a3-f8                                 d8-h4
                                                           4. g1-f2                                 h4xe1
                                                           5. a1-c3                                 X.

            Com a Dama em e1:

                                                                                  I

                                                           1. c5-e3                                 e1-h4
                                                           2. e3-f2                                  h4xe1
                                                           3. e5-c3                                 X.

                                                                                  II

                                                 1. ...                                      e1-d2
                                                           2. e5-b2                                d2-e1
            Se 2. ... d2-c1   3. b2-c3 X.
                                                           3. c5-g1                                e1-h4
                                                           4. g1-f2                                 h4xe1
                                                           5. b2-c3                                X.

            Com a Dama em c1:

                                                          1. e5-c3                                 X.


3
Pé-de-Avestruz: estrutura atípica

         Com a Dama em a5:

                                                                                  I

                                                           1. d4-b2                                a5-c7
            Se 1. ... d8-c7   2. b2-e5 c7-b6  (se 2. ... a5-e1   3. e5-c3 X)  3. e5-b2 b8-a7   4. b2-e5 a5-e1   5. e5-c3 X.
            Se 1. ...  b8-a7   2. b2-e5 a5-b6  (se 2. ... a7-b6   3. e5-b2 X)  3. d6-c7 b6-a5  (se 3. ... b6-e3   4. e5-c3 d8xb6   5. c3-d4 X)   4. e5-g3 d8xb6   5. g3-e1 X.
                                                           2. d6-h2                                c7-a5
                                                           3. b2-f6                                 d8-c7
            Se 3. ... b8-a7   4. h2-g3 a5-b6  (se 4. ... a7-b6   5. g3-e1 X)  5. g3-c7 b6-a5   6. f6-h4 d8xb6   7. h4-e1 X.
                                                           4. h2-g3                                a5-b6
            Se 4. ... c7-b6   5. g3-e1 X.
            Se 4. ... a5-e1   5. f8-e7 e1xh4   6. e7-d8 X.
            Se 4. ... a5-d2   5. g3-d6 X.
                                                           5. g3-e1                                 b6-a7
            Se 5. ... b6-e3   6. e1-a5 e3-b6   7. f6-c3 X.
            Se 5. ... b6-g1   6. idem.
            Se 5. ... b8-a7   6. e1-a5 X.
                                                           6. e1-a5                                 a7-b6
                                                           7. f6-c3                                  b8-a7
                                                           8. f8-d6                                  X.

                                                                                  II

                                                1. ...                                        b8-a7
            Se 1. ... a5-c7   2. d6-h2 c7-a5   3. d4-b6 a5xc7   4. f8-d6 X.
            Se 1. ... d8-c7   2. d4-e5 c7-b6   3. e5-f6 b8-a7   4. f6-e5 a5-e1   5. e5-c3 X.
                                                           2. d6-b8
e prossegue de acordo com O “PÉ-DE-AVESTRUZ” (IV) ─ 1.2 O “Pé-de-Avestruz” e uma Dama e a dupla de pedras ─ II, Diagrama 5.2, Com a Dama em a5 (II). Postagem de OUT.15.

            Com a Dama em h6:

                                                                                  I

                                                           1. d4-f6                                 d8-c7
            Se 1. ... b8-a7   2. d6-h2 a7-b6   3. h2-g1 b6-a5   4. f6-h8 d8-c7  (se 4. ... h6-c1   5. h8-b2 X)  5. g1-h2 c7-b6   6. h2-g1 X.
                                                           2. f6-e5                                 c7-b6
            Se 2. ... h6-c1   3. e5-b2 X.
                                                           3. e5-b2                                b6-a5/b8-a7
                                                           4. b2-c1                                X.

            Nota ─ Alberico C. Mota descobre grave erro na minha solução, quando o lance inicial é das pretas. E segue, na íntegra, a solução do famoso damista:

                                                                                  II

                                                            1. ...                                      h6-g5
                                                           2. d4-h8                                g5-h4
            Se 2. ... b8-a7   3. d6-a3 X.
                                                           3. d6-b4                                d8-c7
            Se 3. ... h4-e1   4. b4-a5 X.
            Se 3. ... b8-c7   4. b4-e1 X.
            Se 3. ... b8-a7   4. b4-e1 d8-c7   5. f8-e7 h4xd8   6. e1-h4 X.
                                                           4. b4-e1                                c7-b6
            Se 4. ... b8-a7   5. f8-e7   6. e1-h4 X.
            Se 4. ... h4-g5, idem.
                                                           5. h8-a1                                h4-d8
            Se 5. ... b8-c7   6. f8-e7   7. e1-h4 X.
            Se 5. ... b8-a7   6. f8-d6 h4-d8   7. e1-h4 X.
            Se 5. ... b6-a5  6. e1-f2   7. a1-c3 X.
                                                           6. e1-h4                                d8-c7
                                                           7. h4-d8                                X.

         Com a Dama em h4:
                                                                                 
                                                           1. d6-f4                                 d8-c7
                                                           2. f8-c5                                 h4-d8
            Se 2. ... h4-e1, ver Variante 1.
                                                           3. f4-d2                                 b8-a7
            Se 3. ... d8-h4, ver Variante 2.
                                                           4. d4-c3                                c7-b6
            Se 4. ... d8-h4   5. c5-f2 X.
                                                           5. c3-d4                                d8-h4
            Se 5. ... b6-a5, ver Diagrama 2.
                                                           6. d2-e1                                h4-d8
            Se 6. ... b6-a5   7. d4-a1 h4-d8   8. e1-f2 d8-h4   9. c5-a3 X.
                                                           7. e1-h4                                b6-a5
                                                           8. d4-f6                                 X.

                                                           VARIANTE 1

                                                           2. ...                                       h4-e1
                                                           3. d4-f6                                 e1-a5
            Se 3. ... e1-h4   4. f6-d8 c7-b6  (se 4. ... b8-a7   5. d8xa5 X)  5. d8xa5 h4-f6   6. f4-c7 X.
                                                           4. c5-e7                                 a5-b6
            Se 4. ... a5-e1   5. f4-g3 X.
            Se 4. ... c7-b6   5. f4-e5 b8-a7   6. e5-f4 a5-e1   7. f4-g3 X.
                                                           5. f4-d2                                 b6-a5
            Se 5. ... b6-a7   6. d2-a5 a7-b6   7. f6-h8 b8-a7   8. e7-d6 X.
            Se 5. ... b6-d2   6.d2-a5 X.
            Se 5. ... b8-a7   6. d2-a5 X.
                                                           6. d2-e1                                 a5-b6
                                                           7. e1-a5                                 b8-a7
                                                           8. e7-f8                                  X.

                                                           VARIANTE 2

                                                           3. ...                                       d8-h4
                                                           4. d2-e1                                b8-a7
            Se 4. ... h4-d8   5. e1-h4 X.
            Se 4. ... h4-g5   5. e1-a5 g5-d8   6. c5-a7 c7-d6   7. a5-b4 d8-e7    8. d4-e5 d6xf4   9. b4xf8 X.
                                                           5. d4-c3                                c7-b6
            Se 5. ... h4-g5   6. c5-d6 X.
            Se 5. ... h4-d8   6. e1-h4 c7-b6   7. c3-a1 X.
                                                           6. c3-d4                                h4-d8
            Se 6. ... b6-a5   7. d4-a1 h4-d8   8. e1-f2 d8-h4   9. c5-a3 X.
                                                           7. e1-h4                                b6-a5
                                                           8. d4-f6                                 X.

4
Pé-de-Avestruz: estrutura atípica

         Com a Dama em h4:

                                                                                  I

                                                           1. d6-a3                                d8-e7
            Se 1. ... h4-g5   2. d4-f6   3. b8-d6 X.
            Se 1. ... h4-e1   2. a3-b4   3. d4-b6 X.
                                                           2. a3-b4                                h4-e1
            Se 2. ... h4-g5   3. b4-a5 g5-h4  (se 3. ... g5-h6/c1   4. a5-d8 X)  4. d4-f6 e7xg5   5. a5-e1 X.
                                                           3. b4-a5                                e1-h4
                                                           4. b8-f4                                 h4-e1
                                                           5. d4-c3                                X.

                                                                                  II

                                                1. ...                                        d8-e7
            Se 1. ... d8-c7   2. d6-c5 X.
            Se 1. ... h4-e1   2. d6-b4   3. d4-b6 X.
            Se 1. ... h4-e7   2. d6-a3 e7-h4   3. d4-f6   4. b8-d6 X.
            Se 1. ... h4-g5   2. d6-a3 g5-c1  (se 2. ... g5-h6   3. a3-c1 X;  se 2. ... g5-h4   3. d4-f6 X)   3. d4-f6 c1-h6   4. a3-c1 d8-e7   5. f6xd8 h6-g7   6. d8-e7 X.
                                                           2. d6-c5                                h4-g5
            Se 2. ... h4-e1   3. d4-c3 X.
                                                           3. d4-f6                                 X.

            Com a Dama em a5:

                                                                                  I

                                                           1. d4-f6                                 a5-b6
            Se 1. ... d8-c7   2. d6-f4 c7-b6  (se 2. ... f8-e7   3. b8xf8 X)  3. b8-a7 X.
            Se 1. ... a5-c7   2. f6-h8   3. h8-e5 X.
            Se 1. ... a5-d2   2. d6-e7 X.
            Se 1. ... a5-e1   2. d6-c5 d8-e7  (se 2. ... e1-h4   3. b8-d6   4. c5-a3 X)  3. f6xd8 e1-c3   4. c5-e7 X.
                                                           2. b8-a7                                b6-a5
                                                           3. d6-b8                                a5-e1
            Se 3. ... f8-e7   4. a7-c5 e7xg5   5. c5-b6 X.
                                                           4. f6-c3                                  X.

                                                                                  II

                                               1. ...                                        d8-e7
            Se 1. ... d8-c7   2. d6-c5 X.
                                                           2. d6-c5                                a5-d8
                                                           3. c5-b4                                d8-a5
                                                           4. b4-e1                                a5-d8
                                                           5. e1-h4                                X.

            Com a Dama em h6:

                                                                                  I

                                                           1. d4-a7                                d8-e7
            Se 1. ... d8-c7   2. d6-a3 h6-c1   3. b8xe5 X.
            Se 1. ... f8-g7   2. d6-e5 X.
            Se 1. ... f8-e7   2. d6xf8 d8-e7   3. f8xc5 h6-g7   4. b8-e5 X.
                                                           2. d6-g3                                e7-f6
            Se 2. ... e7-d6   3. b8xe5 h6-f4   4. a7-b8 X.
            Se 2. ... h6-g7   3. g3-d6 X.
            Se 2. ... h6-c1   3. a7-d4 c1-a3/d2/g5/h6   4. g3-h4 X.
            Se 2. ... f8-g7   3. a7-d4 e7-f6   4. g3-h4 h6-g5   5. d4-e5 X.
                                                           3. a7-d4                                h6-g7
            Se 3. ... f6-g5   4. g3-h4 X.
            Se 3. ... f8-g7   4. g3-h4 X.
                                                           4. g3-d6                                g7-h8
                                                           5. d4xg7                               X.

                                                                                  II

                                               1. ...                                        h6-g5
            Se 1. ... d8-c7   2. d6-a3 c7-b6   3. d4xa7 h6-g7   4. a3-e7 X.
            Se 1. ... d8-e7   2. d6-g3 h6-g5/d2/c1   3. g3-h4 X.
            Ver Com a Dama em h4 (II): “Se 1. ... h4-g5.”

5
Pé-de-Avestruz: estrutura atípica

            Com a Dama em a3:

                                                                  I

                                                           1. d4-g1                                a3-f8
            Se 1. ... h6-g5   2. c1xh6 X.
                                                           2. c1-a3                                 X.

                                                                                  II

                                                1. ...                                        a3-e7
                                                           2. d4-f6                                 e7xg5
                                                           3. h2-f4                                 g5xe3
                                                           4. c1xf4                                 X.

            Com a Dama em a5

            Sem comentários...
6
Pé-de-Avestruz: estrutura atípica
      Com a Dama em d8:

                                                                                  I

                                                           1. e5-c3                                 d8-g5
                                                           2. c5-e3                                 g5xb4
                                                           3. a5xc3                                X.

                                                                                  II

                                                 1. ...                                       d8-g5
                                                           2. e5-f6                                  X.

            Com a Dama em c1:

                                                                                  I

                                                           1. e5-c3                                 X.

                                                                                  II

                                                1. ...                                       c1-h6
                                                          2. e5-g7                                X.

            Com a Dama em e1:

                                                           1. c5-b4                                a3xc5
                                                           2. e5-c3                                 X.

NOTA
            O diagrama abaixo, com três pedras, em vez de duas, tem por base o Diagrama 6, anterior. Ele entra, aqui, de “penetra”. Daí, o número 6.1.    Atenção! Não confundir com o outro Diagrama 6.1 do item 1.2 O “Pé-de-Avestruz” e uma Dama e a dupla de pedras ─ III. Ver O “PÉ-DE-AVESTRUZ” (V), na postagem de NOV.15.
 
6.1
Pé-de-Avestruz: estrutura atípica
      Com a Dama em d8:

                                                                                  I

                                                           1. e5-c3                                 d8-g5
            Se 1. ... a7-b6   2. c5xa7 d8-e7   3. c3-g7 h8xf6   4. a7-c5 X.
                                                           2. c5-e3                                 g5xb4
                                                           3. a5xc3                                X.

                                                                                  II

                                                1. ...                                       d8-g5
                                                          2. e5-f6                                  X.
         Com a Dama em c1:

                                                                                  I

                                                          1. e5-c3                                 X.

                                                                                  II

                                               1. ...                                        c1-h6
            Se 1. ... c1-f4   2. e5xh2 a3-b2   3. a5-c3 b2xb6   4. h2-e5 X.
            Se 1. ... a7-b6   2. c5xa7 c1-h6 e estamos na postagem de SET.15,  Diagrama 1.4 (I), cuja continuidade é: 3. e5-a1 h6-c1  (se 3. ... h6-f4   4. a5-b4 X)  4. a1-c3 c1-f4   5. a7-e3 f4xb4   6. a5xc3 X.
                                                           2. e5-g7                                X.

            Com a Dama em e1:

                                                                                  I

                                                           1. c5-b4                                a3xc5
                                                           2. e5-c3                                 X.

                                                                                  II

                                                 1. ...                                      e1-g3
                                                           2. e5xh2                               a3-b2
                                                           3. a5-c3                                b2xb6
                                                           4. h2-e5                                X.

7
Pé-de-Avestruz: estrutura atípica
      Com a Dama em a5:

                                                                                  I

                                                           1. d4-a7                                b8-c7
            Se 1. ... a5-c3   2. a7-d4 X.
            Se 1. ... f8-g7   2. a7-d4 g7-h6   3. d6-f4 a5-b4  (se 3. ... b8-a7   4. d4-c3 X)  4. d4-g7 h6xf8   5. f4-d6 X.
                                                           2. d6xb8                               a5-c3
                                                           3. d8-e7                                X.
                                                          
                                                                                  II
                                                          
                                                           1. ...                                       b8-a7
                                                           2. d6-b8                                a5-e1
                                                           3. b8-g3                                e1xh4
                                                           4. d4-f6                                 X.

            Com a dama em h6:

                                                                                  I

                                                           1. d4-f6                                 b8-a7
                                                           2. f6-d4                                 h6-d2
                                                           3. d4-c3                                X.

                                                                                  II

                                                           1. ...                                       b8-a7
                                                           2. d4-f6                                 X.
(CONCLUSÃO)

O “PÉ-DE-AVESTRUZ”
 1.4 O “Pé-de-Avestruz”
e uma Dama e três pedras

         Já publicado nesta seção do blog, em postagens de 2011 ─ JAN, FEV e MAR.
Clique aqui.



O “PÉ-DE-AVESTRUZ”
1.5 O “Pé-de-Avestruz”
 e a trinca de pedras

            Já publicado nesta seção do blog, em 4 postagens de 2015 ─ JAN, FEV, MAR e ABR.
PROBLEMAS E ESTUDOS + APÊNDICE DA MATÉRIA PUBLICADA NO INÍCIO DESTA SEÇÃO DO BLOG. Clique aqui.