MESON Chess Problem Database

Problem Display
PID: 232330 (8/8/8/2K2Q2/8/8/1kB5/R7 w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1971

8/8/8/2K2Q2/8/8/1kB5/R7

#2

4 + 1

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Bb1?
      • 1...Kc1
        • 2.Qc2#
      • 1...Kb3
        • 2.Qc2#
      • 1...Kc3
        • 2.Qc2#
      • 1...Kxa1!
    • 1.Bd1?
      • threat
        • 2.Qe5#
        • 2.Qf6#
      • 1...Kc3
        • 2.Qc2#
      • 1...Kxa1!
    • 1.Ba4?
      • threat
        • 2.Qe5#
        • 2.Qf6#
      • 1...Kc3
        • 2.Qc2#
      • 1...Kxa1!
    • 1.Ra2+?
      • 1...Kc1
        • 2.Qf4#
        • 2.Qg5#
      • 1...Kc3
        • 2.Qd3#
      • 1...Kxa2!
    • 1.Qh3?
      • 1...Kxa1
        • 2.Qa3#
      • 1...Kxc2!
    • 1.Qf3?
      • 1...Kxa1
        • 2.Qa3#
      • 1...Kxc2!
  • Keys
    • 1.Qd3!
      • 1...Kxa1
        • 2.Qa3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(B);
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
        • K(a);P-FLIGHT::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • B(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • B(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • R(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT,XR(A)
    • Try
      • Q(D);
      • Vars
        • K(a);S_FLIGHT,XR(A)::QAR2(D)
      • Refutation
        • K(a);P-FLIGHT,XB(B)
    • Try
      • Q(D);
      • Vars
        • K(a);S_FLIGHT,XR(A)::QAR2(D)
      • Refutation
        • K(a);P-FLIGHT,XB(B)
  • Actual
    • Q(D);
    • Vars
      • K(a);S_FLIGHT,XR(A)::QAR2(D)
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