MESON Chess Problem Database

Problem Display
PID: 21915 (8/8/8/5K2/6pk/2Q5/8/8 w - - 0 1)

Langstaff, William A

Mortimer, Ernest Clement

Chess Amateur (The), 1922

8/8/8/5K2/6pk/2Q5/8/8

#2

2 + 2

4349 Kleinste Schachaufgaben Drei- und Viersteiner 1970
3295 Einfuhrung in die Welt des Schachproblem 1984
2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Kh5
      • 2.Qh8#
    • 1...g3
      • 2.Qh8#
  • Tries
    • 1.Qe1+?
      • 1...Kh5
        • 2.Qh1#
      • 1...g3
        • 2.Qh1#
      • 1...Kh3!
    • 1.Qe5?
      • threat
        • 2.Qh2#
      • 1...Kh5
        • 2.Qh2#
        • 2.Qh8#
      • 1...g3
        • 2.Qh8#
      • 1...Kh3!
    • 1.Qf3?
      • threat
        • 2.Qxg4#
      • 1...Kh5
        • 2.Qh1#
      • 1...g3
        • 2.Qh1#
        • 2.Qg4#
      • 1...gxf3!
    • 1.Qg3+?
      • 1...Kh5
        • 2.Qh2#
      • 1...Kxg3!
    • 1.Qc7?
      • threat
        • 2.Qh2#
      • 1...Kh5
        • 2.Qh2#
        • 2.Qh7#
      • 1...g3
        • 2.Qh7#
      • 1...Kh3!
  • Keys
    • 1.Qe3!
      • 1...Kh5
        • 2.Qg5#
      • 1...g3
        • 2.Qh6#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR(A)
    • P(a);SBLOCK::QAR(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR(A)
        • P(a);P_SPINP(a),SBLOCK::QAR(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • P(a);SBLOCK::QAR(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a)::QAR(A)
      • Refutation
        • P(a);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR(A)
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • P(a);SBLOCK::QAR(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);P-FLIGHT::QAR1(A)
      • P(a);SBLOCK::QAR2(A)
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