MESON Chess Problem Database

Problem Display
PID: 95242 (8/2Q5/3KN1pk/7P/8/8/8/8 w - - 0 1)

Juhe, Heinrich

Deutsche Schachblatter, 1941

8/2Q5/3KN1pk/7P/8/8/8/8

#2

4 + 2

6490 yacpdb 2009
5454 Near Snap 2010

SOLUTION

  • SOUND
  • Sets
    • 1...gxh5
      • 2.Qg7#
  • Tries
    • 1.Qe7?
      • 1...Kxh5
        • 2.Qg5#
      • 1...gxh5
        • 2.Qg7#
      • 1...g5!
    • 1.Qf7?
      • threat
        • 2.Qxg6#
      • 1...gxh5
        • 2.Qg7#
      • 1...g5
        • 2.Qg6#
      • 1...Kxh5!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qh8#
      • 1...Kxh5
        • 2.Qh3#
      • 1...Kh7
        • 2.Qg7#
      • 1...gxh5
        • 2.Qg7#

Anticipated by 181773(1905)

This anticipates 102882(1953)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(a);SBLOCK,XP(A)::QAB1(D)
  • Tries
    • Try
      • Q(D);
      • Vars
        • K(b);P-FLIGHT,XP(A)::QAR1(D)
        • P(a);SBLOCK,XP(A)::QAB1(D)
      • Refutation
        • P(a);
    • Try
      • Q(D);
      • Threat
        • QAR1(D),XP(a)
      • Vars
        • P(a);SBLOCK,XP(A)::QAB1(D)
        • P(a);::QAR1(D)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(a),XP(A)
  • Actual
    • Q(D);
    • Threat
      • QAR2(D)
    • Vars
      • K(b);OGATEB,P-FLIGHT,XP(A)::QAR2(D)
      • K(b);P-FLIGHT::QAR1(D)
      • P(a);SBLOCK,XP(A)::QAB1(D)
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