MESON Chess Problem Database

Problem Display
PID: 205689 (8/1B2B3/8/8/5k2/2K5/8/Q7 w - - 0 1)

Steding, H

Funkschach, 1925

8/1B2B3/8/8/5k2/2K5/8/Q7

#2

4 + 1

5454 Near Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qe1?
      • 1...Kf5
        • 2.Qe4#
      • 1...Kg4!
    • 1.Qf1+?
      • 1...Ke3
        • 2.Bc5#
        • 2.Bg5#
        • 2.Qf3#
      • 1...Kg4
        • 2.Qf3#
      • 1...Ke5
        • 2.Qf6#
      • 1...Kg3!
    • 1.Qa4+?
      • 1...Kg3
        • 2.Qh4#
      • 1...Ke5
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...Ke3!
  • Keys
    • 1.Qh1!
      • 1...Ke3
        • 2.Qf3#
      • 1...Kg3
        • 2.Qh4#
      • 1...Kg4
        • 2.Qf3#
      • 1...Ke5
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#

Anticipated by 2175(0000), 49566(0000), 47351(1888), 181089(1904), 121530(1905), 182229(1906), 182335(1906), 194004(1917), 195071(1918)

This anticipates 174121(1926), 227459(1926), 227672(1926), 227673(1926), 227674(1926), 227676(1926), 77127(1948), 10704(1967), 11832(1972), 12251(1976), 248693(2007)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
        • K(a);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(A)
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);P-FLIGHT::QAB1(A)
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Developed and maintained by Brian Stephenson.
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