terça-feira, 17 de fevereiro de 2015

PROBLEMAS E ESTUDOS + APÊNDICE (III) DA MATÉRIA PUBLICADA NO INÍCIO DESTA SEÇÃO DO BLOG



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


                  Problemas

                                                           SOLUÇÃO DO PROBLEMA ANTERIOR

                                                   Problema 82

                                                           1. c3-d4                                e3xc5
                                                           2. a5xh8                               c5-b4
            Se 2. ... c5-d4   3. h8xa1 g5-f4   4. c7-d8 f4-g3   5. a1-f6 h4xe7   6. d8xf2 X.
            Se 2. ... g5-f4   3.  c7-d8 c5-b4   4. e1xa5 h4-f2  (se 4. ... h4-g3   5. a5-d2 X)   5. a5-d2 f4-g3  (se 5. ... f2-e3   6. d2-c1 X)   6. d2-f4 g3xe5   7. h8xg1 X.
                                                           3. e1xa5                                g5-f4
            Se 3. ... h4-g3   4. c7-d8 g5-f4  (se 4. ... g3-h4   5. a5-e1 X)   5. a5-d2 X.
            Se 3. ... h4-f2   4. c7-d8 g5-f4  (se 4. ... f2-h4   5. a5-e1 X;  se 4. ... g5-h4 5. d8-g5 h4xf6   6. h8xg1 X)   5. a5-d2 f4-g3   6. d2-f4 X.
                                                           4. h8-f6                                 h4xb6
                                                           5. a5xh2                               X.

Temas: Mate a Descoberto, Duplo Cotovelo, Finta e Mate em Ângulo

83
Jogam as brancas e ganham 

A solução desse problema, veja na próxima postagem

                  Estudos

                                                             SOLUÇÃO DO ESTUDO ANTERIOR

                                                    Estudo 16

                                                            1. f4-c1                                b2-a1
            Se 1. ... b2-a3   2. h4-f6 h6-g5   3. f6xb2 g5-h4  (se 3. ... g5-f4   4. c1xh6 a3xc1  5. g1-e3 X)  4. c1-h6 a3xc1   5. g1-e3 X.
            Se 1. ... c3-d2   2. c1xa3 X.
            Se 1. ... h6-g5   2. c1xa3 g5-f4   3. a3-c1 X.
                                                           2. c1-b2                                h6-g5
            Se 2. ... c3-d2   3. b2-h8  h6-g5  (se 3. ... d2-e1   4. g1-f2 X;  se 3. ... d2-c1   4. g1-e3 c1xf4   5. h4-f6 X)  4. h4xf6 a1xg7   5. h8xe1 X.
                                                           3. b2xh8                               g5-f4
                                                           4. h4-f6                                 a1xg7
                                                           5. h8xh2                               X.

Temas: Finta e Mate em Ângulo

                               Estudo 17
Jogam as brancas e ganham

A solução desse estudo será dada na próxima postagem


APÊNDICE (III)
DA MATÉRIA PUBLICADA NO INÍCIO DESTA SEÇÃO DO BLOG, INTITULADA

O PÉ-DE-AVESTRUZ
VIII – O “Pé-de-Avestruz”
e uma dama e três pedras


5

                                                                                  I

                                                           1. d4-f6                                 f8-c5
                                                           2. h2-d6                                X.

          Nota ─ O texto, a seguir, é transcrição de O Pé-de-Avestruz de volta, p. 67, mas com pequenas alterações.
          Aqui, eu tinha dito: “Lance único de empate: 1. ... d8-e7”. O já citado Alberico C. Mota encontra, porém, a solução, a seguir apresentada, mas no estilo deste blogueiro:

                                                                                  II

                                                           1. ...                                        d8-e7
                                                           2. d4-g1                                e7-f6
            Se 2. ... h8-g7   3. g1-d4 e7-f6  (se 3. ... e7-d6   4. h2xb8 X)  4. h2-b8 f6-g5   5. h6xc1 g7-h6   6. c1-a3 X.
            Se 2. ... h4-g3   3. h2xb8 e7-f6   4. b8-h2 f8-a3   5. h6-g7 f6-g5   6. g7-b2 a3xc1  7. g1-e3 X.
                                                           3. h2-b8                               f8-a3
            Se 3. ... f6-g5   4. h6xc1 f8-g7   5. c1-h6 g7-a1   6. h6-g7 h8xf6   7. b8-g3  X.
            Se 3. ... h8-g7   4. g1-d4 f6-g5   5. h6xc1 g7-h6   6. c1-a3 X.
            Se 3. ... h4-g3   4. b8xh2 f8-a3   5. h6-g7 X.
                                                           4. h6-g7                                h4-g3
            Se 4. ... f6-g5   5. g7-b2 X.
                                                           5. g7xh2                               a3-b2
                                                           6. b8-f4                                 b2-f6
            Se 6. ... b2-g7   7. f4-h6 g7-f6  (se 7. ... g7-a1   8. h6-g7 h8xf6   9. g1-d4 X)  8. h6-g7 f6-a1   9. g1-d4 X.
                                                           7. g1-f2                                 h8-g7
            Se 7. ... f6-g7   8. f4-h6 g7-f6   9. f2-h4 X.
                                                           8. f2-h4                                 f6-d8
                                                           9. f4-e5                                 X.

6

            Com a Dama em h4:

                                   I

                                                           1. a7-e3                                 h4-d8
            Se 1. ... h4-g5   2. a3-c1 X.
                                                           2. e3-f2                                  d8-h4
            Se 2. ... d8-g5   3. f2-h4 X.
            Se 2. ... h6-g5   3. a3-c1 g5-h4   4. e5-f6 d8xg5   5. c1xh6 X.
                                                           3. f2-e1                                  h4-d8
            Se 3. ... h6-g5   4. e5-g3 X.
                                                           4. e5-c7                                 d8xb6
                                                           5. a3-b4                                 a5xc3
                                                           6. e1xd8                                X.

                                   II

                                                           1. ...                                        h4-g5
            Se 1. ... h6-g5   2. a7-f2 h4xe1   3. e5-c3 e1xb4   4. a3xh4 X.
                                                           2. a7-f2                                  g5-d8
            Se 2. ... g5-c1   3. f2-h4 X.
            Se 2. ... g5-h4   3. f2-e1, etc X.
                                                           3. f2-e1                                  h6-g5
            Se 3. ... d8-b6   4. a3-b4 X.
                                                           4. e5-c7                                 d8xb6
                                                           5. a3-b4                                 a5xc3
                                                           6. e1xh4                                X.

            Com a Dama em c1:

            Observação  ─ Aqui, o lance inicial não pode ser das pretas.

                                                           1. e5-a1                                 h6-g5
                                                           2. a7-e3                                 c1xf4
                                                           3. a3-b4                                 a5xc3
                                                           4. a1xh2                                X.

(CONTINUA)

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