MESON Chess Problem Database

Problem Display
PID: 175585 (4k2r/5p1p/3K4/8/8/8/5Q2/8 w - - 0 1)

Doe, John

Kiebitz Solving Ty. Berlin, 1900

4k2r/5p1p/3K4/8/8/8/5Q2/8

#2

2 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qa7?
      • threat
        • 2.Qb8#
        • 2.Qe7#
        • 2.Qa8#
      • 1...Kd8
        • 2.Qb8#
        • 2.Qd7#
        • 2.Qa8#
      • 1...f5
        • 2.Qe7#
      • 1...f6
        • 2.Qe7#
      • 1...Kf8!
    • 1.Qxf7+?
      • 1...Kd8
        • 2.Qd7#
      • 1...Kxf7!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qe7#
        • 2.Qxh8#
      • 1...Kf8
        • 2.Qxh8#
      • 1...Rf8
        • 2.Qe7#
      • 1...Rg8
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • P(a);::QAR1(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);CHECK,XP(a)
      • Vars
        • K(c);P-FLIGHT::QAR1(A)
      • Refutation
        • K(c);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • K(c);P-FLIGHT,P_SPINP(a)::QAR2(A),XR(d)
      • R(d);::QAR1(A)
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