MESON Chess Problem Database

Problem Display
PID: 95064 (4K3/Q7/8/1R6/4N3/3k3B/3P4/8 w - - 0 1)

Vishkov, Anatoly Ivanovich

Volgogradskaya Pravda, 1984

4K3/Q7/8/1R6/4N3/3k3B/3P4/8

#2

6 + 1

6490 yacpdb 2009
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Bf1#
    • 1...Kxe4
      • 2.Qe3#
  • Tries
    • 1.Bf1+?
      • 1...Kxe4
        • 2.Qe3#
      • 1...Kc2!
    • 1.Bg4?
      • 1...Kc4
        • 2.Be2#
      • 1...Kxe4
        • 2.Qe3#
      • 1...Kc2!
    • 1.Qf2?
      • 1...Kc4
        • 2.Bf1#
      • 1...Kxe4
        • 2.Bf5#
        • 2.Qe3#
      • 1...Kc2!
    • 1.Qe3+?
      • 1...Kc4
        • 2.Sd6#
        • 2.Bf1#
      • 1...Kc2!
    • 1.Qc5?
      • 1...Kxe4
        • 2.Qe3#
      • 1...Ke2!
    • 1.Qa1?
      • 1...Kc2
        • 2.Qb1#
      • 1...Ke2
        • 2.Qf1#
      • 1...Kc4
        • 2.Bf1#
      • 1...Kxe4!
  • Keys
    • 1.Qg1!
      • 1...Kc2
        • 2.Qb1#
      • 1...Ke2
        • 2.Qf1#
      • 1...Kc4
        • 2.Bf1#
      • 1...Kxe4
        • 2.Qe3#

Anticipated by 10692(1967), 219856(1974)

This anticipates 161761(1997), 165525(1998), 153215(2011)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::B(B)
    • K(a);S_FLIGHT,XS(C)::QAR1(E)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(B);
      • Vars
        • K(a);S_FLIGHT::B(B)
        • K(a);S_FLIGHT,XS(C)::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::B(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
        • K(a);S_FLIGHT::B(B)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT::QAB1(E)
      • K(a);S_FLIGHT::B(B)
      • K(a);S_FLIGHT,XS(C)::QAR1(E)
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