MESON Chess Problem Database

Problem Display
PID: 229684 (4k3/6Q1/3K2n1/8/8/8/8/8 w - - 0 1)

Latzel, Gerhard Paul

Deutsche Schachzeitung, 1968

4k3/6Q1/3K2n1/8/8/8/8/8

#2

2 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd8
      • 2.Qd7#
    • 1...Sf4
      • 2.Qe7#
      • 2.Qg8#
    • 1...Sh4
      • 2.Qe7#
      • 2.Qg8#
    • 1...Se5
      • 2.Qe7#
      • 2.Qg8#
    • 1...Se7
      • 2.Qxe7#
    • 1...Sf8
      • 2.Qe7#
    • 1...Sh8
      • 2.Qe7#
      • 2.Qg8#
  • Tries
    • 1.Qxg6+?
      • 1...Kd8
        • 2.Qg8#
      • 1...Kf8!
    • 1.Qa7?
      • 1...Kd8
        • 2.Qb8#
        • 2.Qd7#
        • 2.Qa8#
      • 1...Se7
        • 2.Qxe7#
      • 1...Sf4
        • 2.Qe7#
      • 1...Sh4
        • 2.Qe7#
      • 1...Se5
        • 2.Qe7#
      • 1...Sf8
        • 2.Qe7#
      • 1...Sh8
        • 2.Qe7#
      • 1...Kf8!
    • 1.Qb7?
      • 1...Kd8
        • 2.Qa8#
        • 2.Qd7#
        • 2.Qb8#
      • 1...Se7
        • 2.Qxe7#
      • 1...Sf4
        • 2.Qe7#
      • 1...Sh4
        • 2.Qe7#
      • 1...Se5
        • 2.Qe7#
      • 1...Sf8
        • 2.Qe7#
      • 1...Sh8
        • 2.Qe7#
      • 1...Kf8!
    • 1.Qc7?
      • 1...Se7
        • 2.Qxe7#
      • 1...Sf4
        • 2.Qe7#
      • 1...Sh4
        • 2.Qe7#
      • 1...Se5
        • 2.Qe7#
      • 1...Sf8
        • 2.Qe7#
      • 1...Sh8
        • 2.Qe7#
      • 1...Kf8!
    • 1.Qf7+?
      • 1...Kd8
        • 2.Qd7#
      • 1...Kxf7!
    • 1.Qh7?
      • 1...Kd8
        • 2.Qd7#
      • 1...Sf4
        • 2.Qg8#
        • 2.Qe7#
      • 1...Sh4
        • 2.Qg8#
        • 2.Qe7#
      • 1...Se5
        • 2.Qg8#
        • 2.Qe7#
      • 1...Se7
        • 2.Qxe7#
      • 1...Sf8
        • 2.Qe7#
      • 1...Sh8
        • 2.Qg8#
        • 2.Qe7#
      • 1...Kf8!
  • Keys
    • 1.Qf6!
      • 1...Se7
        • 2.Qxe7#
      • 1...Sf4
        • 2.Qe7#
      • 1...Sh4
        • 2.Qe7#
      • 1...Se5
        • 2.Qe7#
      • 1...Sf8
        • 2.Qe7#
      • 1...Sh8
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(b);P-FLIGHT::QAR1(B)
    • S(a);N_GUARD::QAR1(B),XS(a)
    • S(a);N_GUARD::QAR1(B)
  • Tries
    • Try
      • Q(B);CHECK,XS(a)
      • Vars
        • K(b);P-FLIGHT::QAR(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • S(a);N_GUARD::QAR1(B),XS(a)
        • S(a);N_GUARD::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • S(a);N_GUARD::QAR1(B),XS(a)
        • S(a);N_GUARD::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • S(a);N_GUARD::QAR1(B),XS(a)
        • S(a);N_GUARD::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
        • S(a);N_GUARD::QAR1(B),XS(a)
        • S(a);N_GUARD::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(B);
    • Vars
      • S(a);N_GUARD::QAR1(B),XS(a)
      • S(a);N_GUARD::QAR1(B)
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