MESON Chess Problem Database

Problem Display
PID: 207767 (8/Q7/3p4/2Pk4/3N2R1/7K/8/8 w - - 0 1)

Zujevas, Nikolajus

Zadachi i Etyudi, 2018

8/Q7/3p4/2Pk4/3N2R1/7K/8/8

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Qb6?
      • 1...Ke5
        • 2.Qxd6#
      • 1...dxc5
        • 2.Qe6#
      • 1...Kc4!
    • 1.Qa2+?
      • 1...Ke5
        • 2.Qe6#
      • 1...Kxc5!
    • 1.Qd7?
      • 1...Kxc5
        • 2.Qb5#
      • 1...Ke5
        • 2.Qf5#
        • 2.Qe6#
        • 2.Qxd6#
      • 1...Kc4!
    • 1.Qf7+?
      • 1...Ke5
        • 2.Sf3#
        • 2.Sc6#
        • 2.Qe6#
        • 2.Qf5#
      • 1...Kxc5!
  • Keys
    • 1.Qa6!
      • 1...Kxc5
        • 2.Qb5#
      • 1...Ke5
        • 2.Qxd6#
      • 1...dxc5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);
      • Vars
        • K(a);P-FLIGHT::QAB1(E),XP(b)
        • P(b);OGATE,SBLOCK,XP(D)::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT,XP(D)
    • Try
      • Q(E);P_PINP(b)
      • Vars
        • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XP(D)::QAR1(E)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);P-FLIGHT,XP(D)
  • Actual
    • Q(E);
    • Vars
      • K(a);OGATEB,P-FLIGHT,XP(D)::QAR1(E)
      • K(a);P-FLIGHT::QAB1(E),XP(b)
      • P(b);OGATE,SBLOCK,XP(D)::QAB1(E)
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