MESON Chess Problem Database

Problem Display
PID: 229924 (8/8/8/3N4/4Q3/1k6/8/K7 w - - 0 1)

Latzel, Gerhard Paul

Deutsche Schachzeitung, 1968

8/8/8/3N4/4Q3/1k6/8/K7

#2

3 + 1

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ka3
      • 2.Qb4#
  • Tries
    • 1.Sc3?
      • 1...Ka3
        • 2.Qa4#
      • 1...Kxc3!
    • 1.Sb6?
      • 1...Ka3
        • 2.Qa4#
      • 1...Kc3!
    • 1.Qb1+?
      • 1...Ka3
        • 2.Qa2#
        • 2.Qb4#
      • 1...Ka4
        • 2.Qb4#
      • 1...Kc4!
    • 1.Qc2+?
      • 1...Ka3
        • 2.Qa2#
      • 1...Kxc2!
    • 1.Qe2?
      • threat
        • 2.Qa2#
      • 1...Ka3
        • 2.Qa2#
      • 1...Ka4!
    • 1.Qc4+?
      • 1...Ka3
        • 2.Qa2#
        • 2.Qb4#
      • 1...Kxc4!
    • 1.Qd4?
      • 1...Ka3
        • 2.Qb4#
      • 1...Kc2!
    • 1.Qf4?
      • 1...Ka3
        • 2.Qb4#
      • 1...Kc2!
    • 1.Qg4?
      • 1...Ka3
        • 2.Qb4#
      • 1...Kc2!
    • 1.Qh4?
      • 1...Ka3
        • 2.Qb4#
      • 1...Kc2!
  • Keys
    • 1.Kb1!
      • 1...Ka3
        • 2.Qb4#

FEATURES

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