MESON Chess Problem Database

Problem Display
PID: 181089 (8/8/QK6/6k1/8/2B5/8/3B4 w - - 0 1)

Tempora mutantur

Revue d'Echecs, 1904

8/8/QK6/6k1/8/2B5/8/3B4

#2

4 + 1

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qb5+?
      • 1...Kf4
        • 2.Qe5#
      • 1...Kg6
        • 2.Qh5#
      • 1...Kh6
        • 2.Qh5#
      • 1...Kh4!
    • 1.Qa5+?
      • 1...Kf4
        • 2.Qe5#
      • 1...Kg6
        • 2.Qh5#
      • 1...Kh6
        • 2.Qh5#
      • 1...Kh4!
  • Keys
    • 1.Qe2!
      • 1...Kf4
        • 2.Qe5#
      • 1...Kh4
        • 2.Qg4#
      • 1...Kf5
        • 2.Qg4#
      • 1...Kg6
        • 2.Qh5#
      • 1...Kh6
        • 2.Qh5#

Anticipated by 2175(0000), 49566(0000), 47351(1888)

This anticipates 121530(1905), 182229(1906), 182335(1906), 194004(1917), 195071(1918), 205689(1925), 174121(1926), 227459(1926), 227672(1926), 227673(1926), 227674(1926), 227676(1926), 77127(1948), 10704(1967), 11832(1972), 12251(1976), 196647(1999), 248693(2007)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
        • K(a);OGATE,P-FLIGHT::QAB1(C)
        • K(a);OGATE,S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
        • K(a);OGATE,P-FLIGHT::QAB1(C)
        • K(a);OGATE,S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);S_FLIGHT::QAB1(C)
      • K(a);S_FLIGHT::QAR1(C)
      • K(a);P-FLIGHT::QAB1(C)
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