MESON Chess Problem Database

Problem Display
PID: 108823 (8/K2kN3/1B6/8/4P3/Q7/8/8 w - - 0 1)

Lebedev, Aleksandr N

Sahovski Glasnik, 1937

8/K2kN3/1B6/8/4P3/Q7/8/8

#2

5 + 1

6490 yacpdb 2009
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sd5?
      • 1...Ke6
        • 2.Qe7#
      • 1...Kc8
        • 2.Qh3#
      • 1...Ke8
        • 2.Qe7#
      • 1...Kc6!
    • 1.Sf5?
      • 1...Kc6
        • 2.Qa4#
      • 1...Ke6
        • 2.Qe7#
      • 1...Ke8
        • 2.Qe7#
      • 1...Kc8!
    • 1.Sc6?
      • 1...Ke6
        • 2.Qe7#
      • 1...Kc8
        • 2.Qh3#
      • 1...Ke8
        • 2.Qe7#
      • 1...Kxc6!
    • 1.Sg6?
      • 1...Ke6
        • 2.Qe7#
      • 1...Kc8
        • 2.Qh3#
      • 1...Ke8
        • 2.Qe7#
      • 1...Kc6!
    • 1.Sg8?
      • 1...Ke6
        • 2.Qe7#
      • 1...Kc8
        • 2.Qh3#
      • 1...Ke8
        • 2.Qe7#
      • 1...Kc6!
  • Keys
    • 1.Sc8!
      • 1...Kc6
        • 2.Qa4#
      • 1...Ke6
        • 2.Qe7#
      • 1...Kxc8
        • 2.Qh3#
      • 1...Ke8
        • 2.Qe7#

Anticipated by 182248(1906)

This anticipates 104299(1994)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(E);
      • Vars
        • K(a);S_FLIGHT::QAB(A)
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(E);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT,XS(E)
    • Try
      • S(E);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(E);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(E);
    • Vars
      • K(a);S_FLIGHT::QAB(A)
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);S_FLIGHT,XS(E)::QAB(A)
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