Shape Chess Problem Solutions
Black jumps h4-d5. White jumps g4-g7.
White f6-d9(1), e5:e4(3) or f6-g3(2), e5:e4(2). Black g4-j7(1), g6:g7(3).
White threatens to win with the jump d5-d1. The Black push f4:g5 is a very clever move. The white stone must go to g5 as any other destination lets White win. Afterwards, Black threatens to score a line of six by pushing one of the white stones at either end. White’s only option is to push, making black’s line larger. Most of these pushes are refuted in a single turn by Black. For example, b2:a3; c2-a5 or c2:d4; d2:d1 or c4:b5; c7-f5. Some White replies require Black to make an unstoppable double threat, for example e4:f5; c7-c3 or b4:b5; c4-b9 (or also c4-a9).