MESON Chess Problem Database

Problem Display
PID: 189963 (6k1/8/6Kb/8/8/8/1Q6/8 w - - 0 1)

L'Hermet, Johann Georg Rudolf

Wiener Schachzeitung, 1913

6k1/8/6Kb/8/8/8/1Q6/8

#2

2 + 2

3713 Snap 2019
6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Qg7#
      • 2.Qb8#
    • 1...Bd2
      • 2.Qg7#
      • 2.Qb8#
    • 1...Be3
      • 2.Qg7#
      • 2.Qb8#
    • 1...Bf4
      • 2.Qg7#
    • 1...Bg5
      • 2.Qg7#
    • 1...Bg7
      • 2.Qxg7#
  • Tries
    • 1.Qd4?
      • 1...Kf8
        • 2.Qd8#
      • 1...Bg7
        • 2.Qxg7#
      • 1...Bc1
        • 2.Qg7#
        • 2.Qd8#
      • 1...Bd2
        • 2.Qg7#
        • 2.Qd8#
      • 1...Be3
        • 2.Qg7#
        • 2.Qd8#
      • 1...Bf4
        • 2.Qg7#
        • 2.Qd8#
      • 1...Bg5
        • 2.Qg7#
      • 1...Bf8!
    • 1.Qf6?
      • 1...Bg7
        • 2.Qxg7#
      • 1...Bc1
        • 2.Qg7#
        • 2.Qd8#
      • 1...Bd2
        • 2.Qg7#
        • 2.Qd8#
      • 1...Be3
        • 2.Qg7#
        • 2.Qd8#
      • 1...Bf4
        • 2.Qg7#
        • 2.Qd8#
      • 1...Bg5
        • 2.Qg7#
      • 1...Bf8!
    • 1.Qa2+?
      • 1...Kf8
        • 2.Qf7#
      • 1...Kh8!
    • 1.Qb3+?
      • 1...Kf8
        • 2.Qf7#
      • 1...Kh8!
  • Keys
    • 1.Qb7!
      • 1...Kf8
        • 2.Qf7#
      • 1...Kh8
        • 2.Qh7#
      • 1...Bf8
        • 2.Qh7#
      • 1...Bc1
        • 2.Qa8#
        • 2.Qc8#
        • 2.Qg7#
        • 2.Qb8#
      • 1...Bd2
        • 2.Qa8#
        • 2.Qc8#
        • 2.Qg7#
        • 2.Qb8#
      • 1...Be3
        • 2.Qa8#
        • 2.Qc8#
        • 2.Qg7#
        • 2.Qb8#
      • 1...Bf4
        • 2.Qc8#
        • 2.Qg7#
      • 1...Bg5
        • 2.Qg7#
      • 1...Bg7
        • 2.Qxg7#

This anticipates 40418(1966)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::QAR1(A)
    • B(a);N_GUARD::QAR1(A),XB(a)
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
        • B(a);N_GUARD::QAR1(A),XB(a)
        • B(a);N_GUARD::QAR1(A)
      • Refutation
        • B(a);
    • Try
      • Q(A);
      • Vars
        • B(a);N_GUARD::QAR1(A),XB(a)
        • B(a);N_GUARD::QAR1(A)
      • Refutation
        • B(a);
    • 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);
    • Vars
      • K(b);P-FLIGHT::QAR1(A)
      • B(a);SBLOCK::QAB1(A)
      • B(a);N_GUARD::QAR1(A)
      • B(a);N_GUARD::QAR1(A),XB(a)
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