MESON Chess Problem Database

Problem Display
PID: 201342 (4k3/8/4K3/6b1/4Q3/8/8/8 w - - 0 1)

L'Hermet, Johann Georg Rudolf

Source?, 1922

4k3/8/4K3/6b1/4Q3/8/8/8

#2

2 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Qa8#
    • 1...Bd2
      • 2.Qa8#
    • 1...Be3
      • 2.Qa8#
    • 1...Bh6
      • 2.Qa8#
  • Tries
    • 1.Qc6+?
      • 1...Kd8
        • 2.Qd7#
      • 1...Kf8!
    • 1.Qg6+?
      • 1...Kf8
        • 2.Qf7#
      • 1...Kd8!
    • 1.Qa4+?
      • 1...Kd8
        • 2.Qd7#
      • 1...Kf8!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Qg8#
        • 2.Qh8#
      • 1...Kd8
        • 2.Qd7#
      • 1...Kf8
        • 2.Qf7#
        • 2.Qh8#
      • 1...Bf6
        • 2.Qg8#
      • 1...Bh6
        • 2.Qe7#
      • 1...Be7
        • 2.Qxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::QAR(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • K(b);P-FLIGHT::QAR1(A)
      • B(a);::QAR2(A)
      • B(a);N_GUARD::QAR1(A)
      • B(a);N_GUARD::QAR1(A),XB(a)
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