Мат в 4 хода
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1.Be8-g6 ! zugzwang.
1...d5-d4
2.Bg6-c2 +
2...Ka4-b5
3.Qc3-a3 threat:
4.Bc2-d3 #
3...c6-c5
4.Qa3-a4 #
1...Ka4-b5
2.Qc3-a3 threat:
3.Bg6-d3 #
2...Kb5-c4
3.Ke6-e5 threat:
4.Bg6-d3 #
2...c6-c5
3.Ke6*d5 threat:
4.Bg6-e8 #
1...b6-b5
2.Bg6-c2 #
1...c6-c5
2.Ke6*d5 threat:
3.Kd5-c6 threat:
4.Bg6-c2 #
2...Ka4-b5
3.Qc3-a3 threat:
4.Bg6-e8 #
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