MESON Chess Problem Database

Problem Display
PID: 214074 (8/2K5/2N5/3k3B/8/8/8/5Q2 w - - 0 1)

Duncker, W

Deutsche Schachzeitung, 1975

8/2K5/2N5/3k3B/8/8/8/5Q2

#2

4 + 1

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qf3#
    • 1...Ke6
      • 2.Bf7#
      • 2.Qf7#
  • Tries
    • 1.Kd7?
      • 1...Ke4
        • 2.Qf3#
      • 1...Kc5!
    • 1.Bd1?
      • 1...Ke4
        • 2.Qf3#
      • 1...Ke6
        • 2.Bb3#
      • 1...Kc5!
    • 1.Bg4?
      • 1...Ke4
        • 2.Qf3#
      • 1...Kc5!
    • 1.Bg6?
      • 1...Ke6
        • 2.Bf7#
        • 2.Qf5#
        • 2.Qf7#
      • 1...Kc5!
    • 1.Bf7+?
      • 1...Kc5
        • 2.Qc4#
        • 2.Qf5#
      • 1...Ke4!
    • 1.Qb5+?
      • 1...Ke6
        • 2.Qe5#
      • 1...Ke4!
    • 1.Qf2?
      • 1...Ke4
        • 2.Qf3#
      • 1...Ke6
        • 2.Bf7#
        • 2.Qf7#
      • 1...Kc4!
    • 1.Qf4?
      • 1...Ke6
        • 2.Bf7#
        • 2.Qe5#
        • 2.Qf7#
      • 1...Kc5!
    • 1.Qf7+?
      • 1...Ke4
        • 2.Qf3#
      • 1...Kc5!
    • 1.Qf8?
      • 1...Ke4
        • 2.Qf3#
      • 1...Ke6
        • 2.Qf7#
      • 1...Kc4!
  • Keys
    • 1.Be2!
      • threat
        • 2.Qf5#
      • 1...Ke4
        • 2.Qf3#
      • 1...Kc5
        • 2.Qf5#
      • 1...Ke6
        • 2.Bc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(A)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • K(a);S_FLIGHT::B(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(B);
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(B);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(B);
    • Threat
      • QAR2(A)
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);P-FLIGHT::QAR(A)
      • K(a);S_FLIGHT::B(B)
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