MESON Chess Problem Database

Problem Display
PID: 22384 (7B/8/8/4p3/Q7/4k3/4B3/5K2 w - - 0 1)

L'Hermet, Johann Georg Rudolf

Deutsche Schachzeitung, 1938

7B/8/8/4p3/Q7/4k3/4B3/5K2

#2

4 + 2

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qb5?
      • 1...Kd4
        • 2.Qxe5#
      • 1...Ke4
        • 2.Qxe5#
      • 1...Kf4
        • 2.Qxe5#
      • 1...e4
        • 2.Qg5#
      • 1...Kd2!
    • 1.Qa1?
      • 1...Ke4
        • 2.Qxe5#
      • 1...Kf4
        • 2.Qxe5#
      • 1...e4
        • 2.Qc1#
      • 1...Kd2!
    • 1.Qc4?
      • 1...e4
        • 2.Qc1#
      • 1...Kd2!
    • 1.Qg4?
      • 1...e4
        • 2.Qg5#
      • 1...Kd2!
    • 1.Qh4?
      • 1...e4
        • 2.Qg5#
        • 2.Qh6#
      • 1...Kd2!
  • Keys
    • 1.Qa5!
      • 1...Kd4
        • 2.Qxe5#
      • 1...Ke4
        • 2.Qxe5#
      • 1...Kf4
        • 2.Qxe5#
      • 1...e4
        • 2.Qg5#

Anticipated by 181772(1905)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::QAB1(C),XP(b)
        • K(a);P-FLIGHT::QAR1(C),XP(b)
        • K(a);S_FLIGHT::QAB1(C),XP(b)
        • P(b);OGATE,SBLOCK::QAB(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAR1(C),XP(b)
        • K(a);S_FLIGHT::QAB1(C),XP(b)
        • P(b);SBLOCK::QAB(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • P(b);SBLOCK::QAB(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • P(b);SBLOCK::QAB(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);P_SPINP(b),S_FLIGHT::QAB1(C),XP(b)
      • K(a);P-FLIGHT::QAR1(C),XP(b)
      • K(a);S_FLIGHT::QAB1(C),XP(b)
      • P(b);OGATE,SBLOCK::QAB(C)
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