MESON Chess Problem Database

Problem Display
PID: 47757 (7Q/B7/8/8/7K/5k2/5N2/8 w - - 0 1)

Glisic, Dejan I

StrateGems, 2003

7Q/B7/8/8/7K/5k2/5N2/8

#2

4 + 1

5454 Near Snap 2008
3713 Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qf6#
  • Tries
    • 1.Kh3?
      • 1...Kf4
        • 2.Qf6#
      • 1...Ke2!
    • 1.Qb2?
      • 1...Kf4
        • 2.Qf6#
      • 1...Kg2!
    • 1.Qd4?
      • threat
        • 2.Qe4#
        • 2.Qg4#
      • 1...Ke2
        • 2.Qd1#
      • 1...Kg2!
    • 1.Qg7?
      • threat
        • 2.Qg4#
      • 1...Kf4
        • 2.Qf6#
      • 1...Ke2!
    • 1.Qa8+?
      • 1...Kf4
        • 2.Qe4#
      • 1...Ke2!
    • 1.Qd8?
      • 1...Ke2
        • 2.Qd1#
      • 1...Kf4
        • 2.Qf6#
      • 1...Kg2!
    • 1.Qe8?
      • threat
        • 2.Qe4#
      • 1...Kf4
        • 2.Qe4#
      • 1...Kg2!
  • Keys
    • 1.Qa1!
      • 1...Ke2
        • 2.Qd1#
      • 1...Kg2
        • 2.Qh1#
      • 1...Kf4
        • 2.Qf6#

Anticipated by 206947(1859), 4506(1873), 32680(1873), 214539(1878), 218611(1882), 218488(1882), 24321(1885), 181144(1904), 182379(1906), 109336(1920), 22076(1924), 206740(1925), 227725(1926), 76425(1929), 46372(1941), 18804(1958), 218807(1976), 138100(1981), 133136(1983), 211346(1986), 184446(2000)

This anticipates 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(D)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);
      • Vars
        • K(a);P-FLIGHT::QAR2(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);S_FLIGHT::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);
      • Threat
        • QAB1(D)
      • Vars
        • K(a);P-FLIGHT::QAR2(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);
      • Vars
        • K(a);S_FLIGHT::QAB1(D)
        • K(a);P-FLIGHT::QAR2(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);
      • Threat
        • QAB1(D)
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(D);
    • Vars
      • K(a);S_FLIGHT::QAB1(D)
      • K(a);P-FLIGHT::QAR2(D)
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