MESON Chess Problem Database

Problem Display
PID: 87780 (8/1N3B2/P6Q/1k1N4/8/5K2/8/8 w - - 0 1)

Selivanov, Andrei Vladimirovich

Problemist Pribuzhya, 1993

8/1N3B2/P6Q/1k1N4/8/5K2/8/8

#2

6 + 1

6490 yacpdb 2009
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qd2?
      • 1...Ka4
        • 2.Qb4#
      • 1...Kc4
        • 2.Sc7#
      • 1...Kc6
        • 2.Be8#
      • 1...Kxa6!
    • 1.Qf4?
      • 1...Kc6
        • 2.Qa4#
      • 1...Kxa6!
    • 1.Qh4?
      • 1...Kc6
        • 2.Qa4#
      • 1...Kxa6!
    • 1.Qb6+?
      • 1...Ka4
        • 2.Qb4#
      • 1...Kc4!
    • 1.Qd6?
      • threat
        • 2.Sc3#
      • 1...Ka4
        • 2.Sc3#
        • 2.Qb4#
      • 1...Kc4!
  • Keys
    • 1.Qe3!
      • 1...Ka4
        • 2.Be8#
      • 1...Kc4
        • 2.Sd6#
      • 1...Kxa6
        • 2.Qb6#
      • 1...Kc6
        • 2.Qe8#

This anticipates 171358(1995)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
        • K(a);S_FLIGHT::B(F)+S(B)
        • K(a);S_FLIGHT::B(F)
      • Refutation
        • K(a);S_FLIGHT,XP(C)
    • Try
      • Q(D);
      • Vars
        • K(a);S_FLIGHT::QAB(D)
      • Refutation
        • K(a);S_FLIGHT,XP(C)
    • Try
      • Q(D);
      • Vars
        • K(a);S_FLIGHT::QAB(D)
      • Refutation
        • K(a);S_FLIGHT,XP(C)
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);
      • Threat
        • S(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(D);
    • Vars
      • K(a);S_FLIGHT::B(F)
      • K(a);S_FLIGHT::S(E)
      • K(a);S_FLIGHT,XP(C)::QAR1(D)
      • K(a);S_FLIGHT::QAB(D)
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