MESON Chess Problem Database

Problem Display
PID: 218488 (8/K4N2/5k1p/7P/2B5/8/6Q1/8 w - - 0 1)

Anonymous

Boys' Newspaper, 1882

8/K4N2/5k1p/7P/2B5/8/6Q1/8

#2

5 + 2

6490 yacpdb 2020
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qf3#
  • Tries
    • 1.Ka6?
      • 1...Kf5
        • 2.Qf3#
      • 1...Ke7!
    • 1.Kb6?
      • 1...Kf5
        • 2.Qf3#
      • 1...Ke7!
    • 1.Kb7?
      • 1...Kf5
        • 2.Qf3#
      • 1...Ke7!
    • 1.Ka8?
      • 1...Kf5
        • 2.Qf3#
      • 1...Ke7!
    • 1.Kb8?
      • 1...Kf5
        • 2.Qf3#
      • 1...Ke7!
    • 1.Ba2?
      • 1...Kf5
        • 2.Qf3#
      • 1...Ke7!
    • 1.Bb3?
      • 1...Kf5
        • 2.Qf3#
      • 1...Ke7!
    • 1.Bd5?
      • 1...Kf5
        • 2.Qf3#
      • 1...Ke7!
    • 1.Qd5?
      • threat
        • 2.Qe5#
      • 1...Ke7
        • 2.Qd8#
      • 1...Kg7!
    • 1.Qb7?
      • 1...Kf5
        • 2.Qf3#
      • 1...Kg7!
    • 1.Qe2?
      • threat
        • 2.Qe5#
      • 1...Kf5
        • 2.Qf3#
      • 1...Kg7!
    • 1.Qg3?
      • threat
        • 2.Qe5#
      • 1...Kf5
        • 2.Qf3#
      • 1...Ke7!
    • 1.Qg8?
      • 1...Ke7
        • 2.Qd8#
      • 1...Kf5!
  • Keys
    • 1.Qa8!
      • 1...Kf5
        • 2.Qf3#
      • 1...Ke7
        • 2.Qd8#
      • 1...Kg7
        • 2.Qh8#

Anticipated by 206947(1859), 4506(1873), 32680(1873)

This anticipates 218611(1882), 24321(1885), 182379(1906), 109336(1920), 22076(1924), 227725(1926), 76425(1929), 46372(1941), 18804(1958), 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(A)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(D);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(D);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(B);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(B);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(B);
      • 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);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);P-FLIGHT::QAR2(A)
      • K(a);S_FLIGHT::QAB1(A)
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