MESON Chess Problem Database

Problem Display
PID: 218807 (8/8/5N2/5kp1/6N1/8/Q7/K7 w - - 0 1)

Kashcheev, Niktopolion Pavlovich

Land og Folk, 1976

8/8/5N2/5kp1/6N1/8/Q7/K7

#2

4 + 2

15148 Sadier Collection 2020
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qf2#
  • Tries
    • 1.Kb1?
      • 1...Kf4
        • 2.Qf2#
      • 1...Kg6!
    • 1.Qc2+?
      • 1...Kf4
        • 2.Qf2#
      • 1...Ke6!
    • 1.Qd2?
      • 1...Ke6
        • 2.Qd7#
      • 1...Kg6!
    • 1.Qe2?
      • threat
        • 2.Qe4#
      • 1...Kf4
        • 2.Qf2#
      • 1...Kg6!
    • 1.Qh2?
      • 1...Kg6
        • 2.Qh7#
      • 1...Ke6!
    • 1.Qa4?
      • threat
        • 2.Qe4#
      • 1...Ke6
        • 2.Qd7#
      • 1...Kg6!
  • Keys
    • 1.Qa7!
      • 1...Kf4
        • 2.Qf2#
      • 1...Ke6
        • 2.Qd7#
      • 1...Kg6
        • 2.Qh7#

Anticipated by 206947(1859), 4506(1873), 32680(1873), 214539(1878), 218611(1882), 24321(1885), 182379(1906), 109336(1920), 22076(1924), 227725(1926), 76425(1929), 46372(1941), 18804(1958)

This anticipates 133136(1983), 211346(1986), 184446(2000), 47757(2003), 67253(2006), 232491(2012), 235007(2019)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR2(B)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);P-FLIGHT::QAR2(B)
      • K(a);S_FLIGHT::QAB1(B)
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