MESON Chess Problem Database

Problem Display
PID: 22344 (8/Q2p4/3K4/1k6/8/8/2B5/8 w - - 0 1)

Speckmann, Werner

Einfuhrung in die Welt des Schachproblem, 1984

8/Q2p4/3K4/1k6/8/8/2B5/8

#2

3 + 2

5454 Near Snap 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Kb4
      • 2.Qc5#
    • 1...Kc4
      • 2.Qc5#
  • Tries
    • 1.Kd5?
      • 1...Kb4
        • 2.Qc5#
      • 1...d6!
    • 1.Bd1?
      • 1...Kb4
        • 2.Qc5#
      • 1...Kc4!
    • 1.Qb6+?
      • 1...Kc4
        • 2.Qc5#
      • 1...Kxb6!
    • 1.Qa3?
      • 1...Kc4
        • 2.Qc5#
      • 1...Kb6!
    • 1.Qa5+?
      • 1...Kc4
        • 2.Qc5#
      • 1...Kxa5!
  • Keys
    • 1.Qc7!
      • 1...Kb4
        • 2.Qc5#
      • 1...Ka6
        • 2.Bd3#

Anticipated by 227773(1926)

This anticipates 171363(1995), 161762(1997), 150928(2013), 240516(2013)

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAB1(C)
    • K(a);S_FLIGHT::QAR1(C)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • P(b);
    • Try
      • B(A);
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
  • Actual
    • Q(C);
    • Vars
      • K(a);P-FLIGHT::QAB1(C)
      • K(a);S_FLIGHT::B(A)
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