MESON Chess Problem Database

Problem Display
PID: 206740 (8/8/2Q5/2N1P3/2k5/P7/8/6BK w - - 0 1)

Schneider, Stefan

Reichspost, 1925

8/8/2Q5/2N1P3/2k5/P7/8/6BK

#2

6 + 1

5454 Near Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qa4+?
      • 1...Kd5
        • 2.Qe4#
      • 1...Kc3!
    • 1.Qa8?
      • 1...Kb5
        • 2.Qa6#
      • 1...Kc3!
    • 1.Qe8?
      • 1...Kd5
        • 2.Qe6#
      • 1...Kc3!
    • 1.Qa6+?
      • 1...Kd5
        • 2.Qe6#
      • 1...Kc3!
    • 1.Qb6?
      • threat
        • 2.Qb3#
      • 1...Kd5
        • 2.Qe6#
      • 1...Kc3!
    • 1.Qd6?
      • threat
        • 2.Qd3#
      • 1...Kb5
        • 2.Qa6#
      • 1...Kc3!
    • 1.Qe6+?
      • 1...Kb5
        • 2.Qa6#
      • 1...Kc3!
    • 1.Qf6?
      • 1...Kb5
        • 2.Qa6#
      • 1...Kd5
        • 2.Qe6#
      • 1...Kc3!
    • 1.Qg6?
      • threat
        • 2.Qd3#
      • 1...Kb5
        • 2.Qa6#
      • 1...Kd5
        • 2.Qe4#
        • 2.Qe6#
      • 1...Kc3!
    • 1.Qc8?
      • 1...Kb5
        • 2.Qa6#
      • 1...Kd5
        • 2.Qe6#
      • 1...Kc3!
  • Keys
    • 1.Qh6!
      • 1...Kc3
        • 2.Qc1#
      • 1...Kb5
        • 2.Qa6#
      • 1...Kd5
        • 2.Qe6#

Anticipated by 206947(1859), 4506(1873), 32680(1873), 214539(1878), 218611(1882), 24321(1885), 109336(1920), 22076(1924)

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

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(F);
    • Vars
      • K(a);P-FLIGHT::QAR2(F)
      • K(a);S_FLIGHT::QAB1(F)
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