MESON Chess Problem Database

Problem Display
PID: 205021 (8/8/8/3N4/6Q1/8/2kn1K2/R1N5 w - - 0 1)

Kirichenko, Anatoly Yakovlevich

Kudesnik, 2013

8/8/8/3N4/6Q1/8/2kn1K2/R1N5

#2

5 + 2

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Se3+?
      • 1...Kb2
        • 2.Qd4#
        • 2.Qg7#
      • 1...Kc3!
    • 1.Sb4+?
      • 1...Kb2
        • 2.Qd4#
        • 2.Qg7#
      • 1...Kc3!
    • 1.Qc8+?
      • 1...Kd1
        • 2.Se3#
      • 1...Kb2
        • 2.Qc3#
      • 1...Sc4!
    • 1.Qa4+?
      • 1...Kb2
        • 2.Sd3#
        • 2.Qa2#
      • 1...Sb3!
    • 1.Qc4+?
      • 1...Kd1
        • 2.Se3#
      • 1...Kb2
        • 2.Qa2#
        • 2.Qc3#
      • 1...Sxc4!
  • Keys
    • 1.Qd1+!
      • 1...Kxd1
        • 2.Se3#
      • 1...Kb2
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(E);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);S_FLIGHT::S(E)
        • K(a);P-FLIGHT::QAB1(D)
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • Q(D);CHECK
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);S_FLIGHT::S(E)
      • Refutation
        • S(b);XQ(D)
  • Actual
    • Q(D);CHECK
    • Vars
      • K(a);S_FLIGHT,XQ(D)::S(E)
      • K(a);P-FLIGHT::S(B)
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