MESON Chess Problem Database

Problem Display
PID: 77127 (7B/8/6Q1/7B/8/8/3k4/7K w - - 0 1)

Davey, David Murray

The Tablet, 1948

(First published on Sat Dec 18 1948)

7B/8/6Q1/7B/8/8/3k4/7K

#2

4 + 1

5454 Near Snap 2008

SOLUTION

  • SOUND
  • Tries
    • 1.Qd3+?
      • 1...Kc1
        • 2.Qd1#
      • 1...Ke1
        • 2.Qe2#
      • 1...Kxd3!
    • 1.Qg1?
      • 1...Kc2
        • 2.Qd1#
      • 1...Kd3!
    • 1.Qg2+?
      • 1...Kc1
        • 2.Qb2#
      • 1...Ke1
        • 2.Bc3#
        • 2.Qe2#
      • 1...Kd3
        • 2.Qe2#
      • 1...Ke3!
    • 1.Qd6+?
      • 1...Kc1
        • 2.Qd1#
      • 1...Kc2
        • 2.Qd1#
      • 1...Ke3
        • 2.Qd4#
      • 1...Ke1!
  • Keys
    • 1.Qg4!
      • 1...Kc1
        • 2.Qd1#
      • 1...Ke1
        • 2.Qe2#
      • 1...Kc2
        • 2.Qd1#
      • 1...Kd3
        • 2.Qe2#
      • 1...Ke3
        • 2.Qd4#

Anticipated by 2175(0000), 49566(0000), 47351(1888), 181089(1904), 121530(1905), 182229(1906), 182335(1906), 194004(1917), 195071(1918), 205689(1925), 174121(1926), 227459(1926), 227672(1926), 227673(1926), 227674(1926), 227676(1926)

This anticipates 10704(1967), 11832(1972), 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);OGATE,S_FLIGHT::QAR1(C)
        • K(a);S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(C)
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(C)
        • K(a);OGATE,P-FLIGHT::QAB1(C)
        • K(a);S_FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);S_FLIGHT::QAR1(C)
      • K(a);P-FLIGHT::QAB1(C)
      • K(a);S_FLIGHT::QAB1(C)
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