MESON Chess Problem Database

Problem Display
PID: 66579 (K7/8/N7/3k2P1/2N5/7Q/4P3/8 w - - 0 1)

van Beek, J

Tijdschrift vd NSB, 1897

K7/8/N7/3k2P1/2N5/7Q/4P3/8

#2

6 + 1

5454 Near Snap 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc4
      • 2.Qd3#
    • 1...Kd4
      • 2.Qd3#
  • Tries
    • 1.Kb7?
      • 1...Kxc4
        • 2.Qd3#
      • 1...Kd4
        • 2.Qd3#
      • 1...Ke4!
    • 1.Qf5+?
      • 1...Kxc4
        • 2.Qd3#
      • 1...Kd4
        • 2.Qd3#
      • 1...Kc6!
    • 1.Qd7+?
      • 1...Kxc4
        • 2.Qd3#
      • 1...Ke4!
    • 1.Qe3?
      • 1...Kxc4
        • 2.Qd3#
      • 1...Kc6!
    • 1.Qf3+?
      • 1...Kxc4
        • 2.Qd3#
      • 1...Kd4
        • 2.Qd3#
      • 1...Ke6!
  • Keys
    • 1.Qh7!
      • 1...Kxc4
        • 2.Qd3#
      • 1...Kd4
        • 2.Qd3#
      • 1...Kc6
        • 2.Qb7#
      • 1...Ke6
        • 2.Sc7#

This anticipates 149379(1921)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT,XS(C)::QAB1(B)
    • K(a);P-FLIGHT::QAR1(B)
  • Tries
    • Try
      • K(F);S_FLIGHT
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAB1(B)
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAB1(B)
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(C)::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAB1(B)
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);S_FLIGHT,XS(C)::QAB1(B)
      • K(a);P-FLIGHT::QAR1(B)
      • K(a);S_FLIGHT::QAB1(B)
      • K(a);S_FLIGHT::S(E)
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