MESON Chess Problem Database

Problem Display
PID: 169376 (8/1pB5/8/3kN1N1/6K1/8/5Q2/8 w - - 0 1)

Muller, Dieter

SuperProblem 118. TT, 2014

8/1pB5/8/3kN1N1/6K1/8/5Q2/8

#2

5 + 2

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Bd6?
      • threat
        • 2.Qc5#
        • 2.Qd2#
      • 1...b6
        • 2.Qd2#
      • 1...Kxd6!
    • 1.Qa2+?
      • 1...Kc5
        • 2.Qc4#
      • 1...Kd4!
    • 1.Qf3+?
      • 1...Kd4
        • 2.Se6#
      • 1...Kc5!
    • 1.Qf4?
      • threat
        • 2.Qc4#
      • 1...Kc5
        • 2.Qc4#
      • 1...b5!
    • 1.Qf7+?
      • 1...Kc5
        • 2.Qc4#
      • 1...Kd4!
  • Keys
    • 1.Bb6!
      • threat
        • 2.Qd4#
        • 2.Qc5#
      • 1...Kxe5
        • 2.Qd4#
      • 1...Kd6
        • 2.Qc5#

Anticipated by 11825(1972), 39342(1997), 108589(1998)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAR(A)
      • Refutation
        • K(a);P-FLIGHT,XB(E)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::S(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • B(E);
    • Threat
      • DUALS(2)
    • Vars
      • K(a);P-FLIGHT,XS(C)::QAB1(A)
      • K(a);P-FLIGHT::QAB1(A)
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