MESON Chess Problem Database

Problem Display
PID: 108498 (3KbN2/6Q1/2k5/8/8/1P6/5B2/8 w - - 0 1)

Juk, Aleksandr I

Za Ogneypori, 1989

3KbN2/6Q1/2k5/8/8/1P6/5B2/8

#2

5 + 2

6490 yacpdb 2009
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bh5
      • 2.Qd7#
    • 1...Bg6
      • 2.Qd7#
    • 1...Bd7
      • 2.Qxd7#
  • Tries
    • 1.Qd4?
      • 1...Kb5
        • 2.Qb6#
        • 2.Qa4#
      • 1...Bh5
        • 2.Qd7#
      • 1...Bg6
        • 2.Qd7#
      • 1...Bd7
        • 2.Qxd7#
      • 1...Bf7
        • 2.Qd7#
      • 1...Kb7!
    • 1.Qf6+?
      • 1...Kb5
        • 2.Qb6#
      • 1...Kd5
        • 2.Qe6#
      • 1...Kb7!
    • 1.Qa7?
      • 1...Kb5
        • 2.Qb6#
        • 2.Qa4#
      • 1...Kd6
        • 2.Qc5#
      • 1...Bh5
        • 2.Qd7#
      • 1...Bg6
        • 2.Qd7#
      • 1...Bd7
        • 2.Qxd7#
      • 1...Bf7
        • 2.Qd7#
      • 1...Kd5!
    • 1.Qc7+?
      • 1...Kb5
        • 2.Qb6#
      • 1...Kd5!
    • 1.Qe7?
      • 1...Kd5
        • 2.Qe6#
      • 1...Bd7
        • 2.Qxd7#
      • 1...Bh5
        • 2.Qd7#
      • 1...Bg6
        • 2.Qd7#
      • 1...Bf7
        • 2.Qd7#
      • 1...Kb5!
  • Keys
    • 1.Qg4!
      • 1...Kb5
        • 2.Qa4#
      • 1...Kd5
        • 2.Qe6#
      • 1...Kd6
        • 2.Qe6#
      • 1...Kb7
        • 2.Qc8#
      • 1...Bh5
        • 2.Qd7#
      • 1...Bg6
        • 2.Qd7#
      • 1...Bd7
        • 2.Qxd7#
      • 1...Bf7
        • 2.Qd7#

This anticipates 150325(1990)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(b);N_GUARD::QAB1(C)
    • B(b);N_GUARD::QAB1(C),XB(b)
  • Tries
    • Try
      • Q(C);
      • Vars
        • B(b);N_GUARD::QAB1(C)
        • B(b);N_GUARD::QAB1(C),XB(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(C)
        • K(a);S_FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
        • B(b);N_GUARD::QAB1(C)
        • B(b);N_GUARD::QAB1(C),XB(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
        • B(b);N_GUARD::QAB1(C),XB(b)
        • B(b);N_GUARD::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);S_FLIGHT::QAB1(C)
      • K(a);P-FLIGHT::QAR1(C)
      • B(b);N_GUARD::QAB1(C)
      • B(b);N_GUARD::QAB1(C),XB(b)
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