MESON Chess Problem Database

Problem Display
PID: 162211 (5Q2/8/2K2N2/8/3p4/3k4/1R1P4/3R4 w - - 0 1)

McDowell, Michael

The Problemist, 2015

5Q2/8/2K2N2/8/3p4/3k4/1R1P4/3R4

#2

6 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Se4?
      • 1...Ke2
        • 2.Qf1#
      • 1...Kc4
        • 2.d3#
      • 1...Kxe4!
    • 1.Sd5?
      • 1...Ke2
        • 2.Qf1#
      • 1...Kc4
        • 2.d3#
      • 1...Ke4!
    • 1.Sd7?
      • 1...Ke2
        • 2.Qf1#
      • 1...Kc4
        • 2.Se5#
      • 1...Ke4!
    • 1.Qa3+?
      • 1...Kc4
        • 2.Rc1#
        • 2.Rc2#
        • 2.Rb4#
        • 2.Qb3#
        • 2.Qa6#
        • 2.d3#
      • 1...Ke2!
    • 1.Qa8?
      • threat
        • 2.Qa6#
      • 1...Kc4
        • 2.Qa6#
      • 1...Ke2!
    • 1.Qb8?
      • threat
        • 2.Qb5#
      • 1...Kc4
        • 2.Qb3#
        • 2.Qb5#
      • 1...Ke2!
    • 1.Qc8?
      • threat
        • 2.Qa6#
      • 1...Kc4
        • 2.Qa6#
      • 1...Ke2!
  • Keys
    • 1.Sg4!
      • 1...Ke2
        • 2.Qf1#
      • 1...Kc4
        • 2.Se5#
      • 1...Ke4
        • 2.d3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
        • K(a);OGATE,S_FLIGHT::P(C)
      • Refutation
        • K(a);S_FLIGHT,XS(E)
    • Try
      • S(E);
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
        • K(a);OGATE,S_FLIGHT::P(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(E);
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
        • K(a);S_FLIGHT::S(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAB(F)
      • Vars
        • K(a);S_FLIGHT::QAB(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAB(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAB(F)
      • Vars
        • K(a);S_FLIGHT::QAB(F)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(E);
    • Vars
      • K(a);S_FLIGHT::QAB1(F)
      • K(a);S_FLIGHT::S(E)
      • K(a);OGATE,S_FLIGHT::P(C)
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