MESON Chess Problem Database

Problem Display
PID: 199603 (7Q/8/6R1/8/2N1k3/4P3/8/1K6 w - - 0 1)

Viskov, Anatoly

Uralski Problemist, 1996

7Q/8/6R1/8/2N1k3/4P3/8/1K6

#2

5 + 1

5454 Near Snap 2019
3713 Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qd4#
  • Tries
    • 1.Rg2?
      • 1...Kd3
        • 2.Qd4#
      • 1...Kf3
        • 2.Qa8#
      • 1...Kf5
        • 2.Qe5#
      • 1...Kd5!
    • 1.Qc3?
      • 1...Kd5
        • 2.Qd4#
      • 1...Kf5
        • 2.Qc2#
        • 2.Qd3#
      • 1...Kf3!
    • 1.Qd4+?
      • 1...Kf5
        • 2.Qd3#
        • 2.Qg4#
      • 1...Kf3!
    • 1.Qf6?
      • 1...Kd5
        • 2.Qd4#
        • 2.Qc6#
      • 1...Kd3!
    • 1.Qh2?
      • 1...Kd3
        • 2.Qc2#
      • 1...Kf3
        • 2.Qg2#
      • 1...Kf5
        • 2.Qc2#
      • 1...Kd5!
    • 1.Qd8?
      • 1...Kf5
        • 2.Qd3#
      • 1...Kf3!
  • Keys
    • 1.Qb2!
      • 1...Kd3
        • 2.Qc2#
      • 1...Kf3
        • 2.Qg2#
      • 1...Kd5
        • 2.Qd4#
      • 1...Kf5
        • 2.Qc2#

Anticipated by 41263(1939), 176171(1960), 231028(1969)

This anticipates 142483(2006), 231062(2011)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR1(E)
  • Tries
    • Try
      • R(D);
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
        • K(a);S_FLIGHT::QAB(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
        • K(a);S_FLIGHT::QAB(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAB(E)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT::QAB1(E)
      • K(a);S_FLIGHT::QAR1(E)
      • K(a);S_FLIGHT::QAB(E)
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