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The following represent a variety of positions from the Brazilian 8-time women's champion, WIM Regina Ribeiro. In the following diagrams, you're challenged to find the winning line. Each position ends with decisive material gain or mate. Solve each of the four problems (as deep as possible) and check your answers by scrolling below. No peeking!!
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WIM Regina Ribeiro - WFM Paula F. Delai
White to Move (after 22…axb6 )
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WGM Rena Graf - WIM Regina Ribeiro
Black to Move (after 21.Nd7-e5)
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WIM Regina Ribeiro - Jessica Drobrzenski
White to Move (after 40… g6-g5)
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WIM Regina Ribeiro - Ayodhya Liyanagedara
White to Move (after 25…Ra8-b8)
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Solutions
No. 1 Ribeiro - Delai (2006 Brazilian Women's Ch., São Paulo, Brazil)
Ribeiro played in her first Brazilian championship in 1980. Since then she has won a total of eight times including the 2006 version. Ribeiro possesses a solid style of play and appears to be fond of fianchettoing her king's bishop. In this game, she builds a solid position and then counter black's play in the c-file with a central thrust 20.e5. After a few exchanges, she followed with another central thrust which would prove decisive. After 23.d6! She wrapped up the game after 23…exd6 24. Bxf6! Bxf6 25.Bb7 winning the exchange. This was followed by 25…Nb8 26.Bxc8 Rxc8 27.Nd5! which would win a piece. (See game; see essay on Afro Brazilian chess, see essay on Brazil; see essay on capoeira and chess)
No. 2 Graf-Ribeiro (1997 Groningen Open - Groningen, Netherlands)
This was a very nice finish to an impressive kingside attack. Ribeiro played the Stonewall Dutch and took advantage of white's awkward setup. She began her attack with 14…Ng4 and her pieces started to flow into their attacking positions. Having invaded the dark squares, Ribeiro finished the game off with the snappy 21…Rxe5! After 22.dxe5 Rd2 23.Qf3 Qxh3! the German player was faced with an unstoppable mate and decided to resign. Nice! (See game)
No. 3 Ribeiro-Drobrzenski (2006 Brazilian Women's Ch., São Paulo, Brazil)
Yet another position where white builds an impressive position and then explodes with a central thrust of 36.d5! After the center of the board cleared, white's pieces flowed into the cramped enemy camp. Black could have sacrificed a pawn to free the position, but a lost ending would have ensued. Nevertheless, the final blow cames… 41.Rd6! with the threat of demolishing the kingside. The king tried to run, but it could not hide after 41…exf4 42.Rg6+ Kf8 43.Bd5 Ke8 44.Rg8+ Kd7 and finally 45.e6+. Black resigned before being mated after 45…Qxe6 46.Qd8#. (See game)
No. 4 Ribeiro - Liyanagedara (2004 Chess Olympiad- Mallorca, Spain)
This is another positional buildup ending in a violent ending. Ribeiro employed the Maroczy Bind and characteristically expanded on the queenside. Her thrust of 21.a5! started the avalanche as white's pieces overan black's retarded position. Riberio's two bishops raked the queenside and came into good effect after 26.Rc8! Rxc8 27.Rxc8 Kf8 28.Qxb7 Rxb7 29.b6! clearing the way for Bb5. The game ended quicky with 29…axb6 30.Bb5 f5 31.Bxe8 Ra7 32.Bxg6# (See game)
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