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 Author: Carlos CetinaOnly the author of this comment can edit it. Comment: Yes, 48.b6 is the appropriate move. Since white has a material advantage of 2 units, playing rightly he should win easily. 48...axb6 is forced and, after 49.Nxb6, white should try to promote the a-pawn combined with tactical threats to the black king. This game, despite some oversights by both sides, has a remarkable educational value because you can learn how to maneuver the sissa and take advantage of its peculiar way of movement. Let's see how black loses immediately if he refuses to exchange pawns at turn 48th. Hereinbelow I will use the well-known algebraic notation. 48...Sxa4 49.bxa7 Sa6 (a4-c6-a6) The black sissa menaces to capture the a7-pawn and keeps off it promotes. With a beautiful sequence of 3 checks, white forces the promotion. 50.Se7+ Kh8 (unique; h7 is covered by the white sissa via e7-h4-h7) 51.Sxf7+ Kg8 (unique) 52.Sg5+ (g5-d8-g8) Now, if 52...Kh8, then 53.a8=Q+ Sxa8 54.Sxa8 (g5-d8-a8) or 52... Se8 [(a6-c8-e8) obstructing the check but allowing the promotion] 53.a8=Q, etc. Using HTML tags in the comment

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