MESON Chess Problem Database

Problem Display
PID: 109336 (8/1p6/pB6/K7/8/5k2/5N1P/2Q5 w - - 0 1)

Scheel, Johan

Tidens Tegn, 1920

8/1p6/pB6/K7/8/5k2/5N1P/2Q5

#2

5 + 3

6490 yacpdb 2009
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke2
      • 2.Qd1#
    • 1...Kg2
      • 2.Qh1#
  • Tries
    • 1.Ka4?
      • 1...Ke2
        • 2.Qd1#
      • 1...Kg2
        • 2.Qh1#
      • 1...a5!
    • 1.Kb4?
      • 1...Ke2
        • 2.Qd1#
      • 1...Kg2
        • 2.Qh1#
      • 1...a5+!
    • 1.Qb2?
      • 1...Kf4
        • 2.Qf6#
      • 1...Kg2!
    • 1.Qb1?
      • threat
        • 2.Qe4#
      • 1...Ke2
        • 2.Qd1#
      • 1...Kg2
        • 2.Qh1#
      • 1...Kf4!
    • 1.Qd1+?
      • 1...Kg2
        • 2.Qh1#
      • 1...Kf4!
    • 1.Qe1?
      • threat
        • 2.Qe4#
      • 1...Kg2
        • 2.Qh1#
      • 1...Kf4!
    • 1.Qg1?
      • threat
        • 2.Qg4#
      • 1...Ke2
        • 2.Qd1#
      • 1...Kf4!
    • 1.Qh1+?
      • 1...Ke2
        • 2.Qd1#
      • 1...Kf4!
  • 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), 218488(1882), 218611(1882), 24321(1885), 181144(1904), 182379(1906)

This anticipates 22076(1924), 206740(1925), 227725(1926), 76425(1929), 46372(1941), 18804(1958), 218807(1976), 138100(1981), 133136(1983), 211346(1986), 184446(2000), 47757(2003), 67253(2006), 232491(2012), 235007(2019)

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(A)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • K(D);S_FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • P(b);CHECK
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);P-FLIGHT::QAR2(A)
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