MESON Chess Problem Database

Problem Display
PID: 219849 (4k1nr/8/4K2p/8/6Q1/8/8/8 w - - 0 1)

Kashcheev, Niktopolion Pavlovich

Land og Folk, 1973

4k1nr/8/4K2p/8/6Q1/8/8/8

#2

2 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rh7
      • 2.Qxg8#
  • Tries
    • 1.Qh5+?
      • 1...Kf8
        • 2.Qf7#
      • 1...Kd8!
    • 1.Qa4+?
      • 1...Kd8
        • 2.Qd7#
      • 1...Kf8!
    • 1.Qf4?
      • threat
        • 2.Qb8#
      • 1...Kd8
        • 2.Qb8#
      • 1...Se7!
    • 1.Qg6+?
      • 1...Kf8
        • 2.Qf7#
      • 1...Kd8!
    • 1.Qg7?
      • 1...Kd8
        • 2.Qd7#
      • 1...Se7
        • 2.Qxe7#
      • 1...Rh7
        • 2.Qxg8#
      • 1...Sf6
        • 2.Qe7#
      • 1...h5!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qb8#
      • 1...Kd8
        • 2.Qb8#
      • 1...Se7
        • 2.Qxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(d);N_GUARD::QAR2(A),XS(c)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
      • Refutation
        • S(c);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • S(c);N_GUARD::QAR1(A),XS(c)
        • R(d);N_GUARD::QAR2(A),XS(c)
        • S(c);N_GUARD::QAR1(A)
      • Refutation
        • P(a);
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • K(b);P-FLIGHT::QAR2(A)
      • S(c);N_GUARD::QAR1(A),XS(c)
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