MESON Chess Problem Database

Problem Display
PID: 215520 (8/1b2K2N/8/3k4/8/N5Q1/5P2/8 w - - 0 1)

Kashcheev, Niktopolion Pavlovich

Land og Folk, 1974

8/1b2K2N/8/3k4/8/N5Q1/5P2/8

#2

5 + 2

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qd6#
    • 1...Kc6
      • 2.Qd6#
  • Tries
    • 1.Sg5?
      • threat
        • 2.Qd6#
      • 1...Kc5
        • 2.Qd6#
      • 1...Kc6
        • 2.Qd6#
      • 1...Kd4!
    • 1.Qe5+?
      • 1...Kc6
        • 2.Qd6#
      • 1...Kxe5!
    • 1.Qd3+?
      • 1...Kc5
        • 2.Qd6#
      • 1...Kc6
        • 2.Qd6#
      • 1...Ke5!
    • 1.f3?
      • threat
        • 2.Qd6#
      • 1...Kc5
        • 2.Qd6#
      • 1...Kc6
        • 2.Qd6#
      • 1...Kd4!
  • Keys
    • 1.Sf6+!
      • 1...Kd4
        • 2.Qe3#
      • 1...Kc5
        • 2.Qd6#
      • 1...Kc6
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAB1(C)
    • K(a);S_FLIGHT::QAR1(C)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
        • K(a);S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(C)
        • K(a);OGATE,S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(A);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
        • K(a);S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(E);CHECK
    • Vars
      • K(a);P-FLIGHT::QAB1(C)
      • K(a);S_FLIGHT::QAR1(C)
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