MESON Chess Problem Database

Problem Display
PID: 181750 (4Q3/8/K1N1p3/3k4/4N3/8/4P3/8 w - - 0 1)

Culka, Frantisek

Pravo lidu, 1905

4Q3/8/K1N1p3/3k4/4N3/8/4P3/8

#2

5 + 2

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qxe6#
  • Tries
    • 1.Kb5?
      • 1...e5
        • 2.Qxe5#
      • 1...Kxe4!
    • 1.Qd7+?
      • 1...Kc4
        • 2.Qxe6#
        • 2.Qd3#
      • 1...Kxe4!
    • 1.Qb8?
      • 1...Kc4
        • 2.Qb5#
      • 1...Kxe4
        • 2.Qe5#
      • 1...Kxc6
        • 2.Qd6#
        • 2.Qb7#
      • 1...e5!
    • 1.Qd8+?
      • 1...Kc4
        • 2.Qd3#
      • 1...Kxc6
        • 2.Qd6#
      • 1...Kxe4!
  • Keys
    • 1.Qf7!
      • 1...Kc4
        • 2.Qxe6#
      • 1...Kxe4
        • 2.Qf3#
      • 1...Kxc6
        • 2.Qb7#

This anticipates 181844(1905), 28736(1927), 80435(1962)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB(E),XP(b)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • P(b);OGATE::QAR1(E),XP(b)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT,XS(B)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);S_FLIGHT,XS(B)
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
        • K(a);S_FLIGHT,XS(B)::QAR1(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(E)
        • K(a);S_FLIGHT,XS(D)::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XS(B)
  • Actual
    • Q(E);P_PINP(b)
    • Vars
      • K(a);S_FLIGHT::QAB(E),XP(b)
      • K(a);N_SPINP(b),OGATEB,S_FLIGHT,XS(B)::QAB1(E)
      • K(a);N_SPINP(b),OGATEB,S_FLIGHT,XS(D)::QAB1(E)
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