MESON Chess Problem Database

Problem Display
PID: 201683 (4K3/8/6N1/5p1k/3Q1B2/7b/8/8 w - - 0 1)

L'Hermet, Johann Georg Rudolf

Kagans Neueste Schachnachrichten, 1922

4K3/8/6N1/5p1k/3Q1B2/7b/8/8

#2

4 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kg4
      • 2.Qd1#
  • Tries
    • 1.Qh8+?
      • 1...Kxg6
        • 2.Qh6#
      • 1...Kg4!
    • 1.Qd5?
      • 1...Kg4
        • 2.Qd1#
      • 1...Kxg6
        • 2.Qf7#
      • 1...Bf1
        • 2.Qxf5#
      • 1...Bg2
        • 2.Qxf5#
      • 1...Bg4!
    • 1.Qd8?
      • threat
        • 2.Qg5#
      • 1...Kg4
        • 2.Qd1#
      • 1...Kxg6!
  • Keys
    • 1.Qd7!
      • 1...Kg4
        • 2.Qd1#
      • 1...Kxg6
        • 2.Qf7#
      • 1...Bf1
        • 2.Qxf5#
      • 1...Bg2
        • 2.Qxf5#
      • 1...Bg4
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::QAB(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT,XS(C)::QAR1(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);P_PINP(b)
      • Vars
        • K(c);N_SPINP(b),S_FLIGHT::QAB(A)
        • K(c);N_SPINP(b),OGATEB,S_FLIGHT,XS(C)::QAB1(A)
        • B(a);N_GUARD::QAR2(A),XP(b)
      • Refutation
        • B(a);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(c);S_FLIGHT::QAB(A)
      • Refutation
        • K(c);S_FLIGHT,XS(C)
  • Actual
    • Q(A);
    • Vars
      • K(c);P_SPINP(b),S_FLIGHT::QAB(A)
      • K(c);OGATEB,S_FLIGHT,XS(C)::QAB1(A)
      • B(a);N_GUARD::QAR2(A),XP(b)
      • B(a);SBLOCK::QAR2(A)
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