MESON Chess Problem Database

Problem Display
PID: 9762 (N5Q1/nkPP4/8/8/4K3/8/8/8 w - - 0 1)

Kubbel, Leonid Ivanovich (AKA Kubbel, Karl Artur Leonid)

Narodni listy, 1909

N5Q1/nkPP4/8/8/4K3/8/8/8

#2

5 + 2

3295 Einfuhrung in die Welt des Schachproblem 1984
3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991
3310 2345 Chess Problems 1997
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qd5#
  • Tries
    • 1.Qb3+?
      • 1...Ka6
        • 2.Qb6#
      • 1...Kc6
        • 2.Qd5#
      • 1...Kxa8
        • 2.Qb8#
      • 1...Sb5!
    • 1.Qb8+?
      • 1...Ka6
        • 2.Qb6#
      • 1...Kc6!
  • Keys
    • 1.Qa2!
      • 1...Kc6
        • 2.Qd5#
      • 1...Kxa8
        • 2.c8Q#
      • 1...Sb5
        • 2.c8Q#
      • 1...Sc6
        • 2.c8Q#
      • 1...Sc8
        • 2.d8S#

This anticipates 172240(1996)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAB1(E)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(E)
        • K(b);S_FLIGHT::QAB1(E)
        • K(b);OGATE,S_FLIGHT,XS(D)::QAR1(E)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(E)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(b);S_FLIGHT::QAB1(E)
      • K(b);P_SPINS(a),S_FLIGHT,XS(D)::P=Q
      • S(a);N_GUARD::P=Q
      • S(a);SBLOCK::P=S
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