MESON Chess Problem Database

Problem Display
PID: 10813 (8/8/K7/2N5/3B4/8/kpN5/6Q1 w - - 0 1)

Chepizhni, Viktor Ivanovich

The Problemist, 1968

8/8/K7/2N5/3B4/8/kpN5/6Q1

#2

5 + 2

3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...b1S
      • 2.Qg8#
    • 1...b1B
      • 2.Qg8#
  • Tries
    • 1.Qe3?
      • 1...b1Q
        • 2.Qa3#
      • 1...b1S
        • 2.Sb4#
        • 2.Qb3#
        • 2.Qe6#
      • 1...b1B
        • 2.Sb4#
        • 2.Qa3#
        • 2.Qb3#
        • 2.Qe6#
      • 1...b1R
        • 2.Qa3#
      • 1...Kb1!
    • 1.Qg3?
      • 1...b1Q
        • 2.Qa3#
      • 1...b1S
        • 2.Sb4#
        • 2.Qb3#
        • 2.Qg8#
      • 1...b1B
        • 2.Sb4#
        • 2.Qa3#
        • 2.Qb3#
        • 2.Qg8#
      • 1...b1R
        • 2.Qa3#
      • 1...Kb1!
  • Keys
    • 1.Qe1!
      • 1...b1Q
        • 2.Qa5#
      • 1...b1S
        • 2.Qe6#
      • 1...b1B
        • 2.Qa5#
        • 2.Qe6#
      • 1...b1R
        • 2.Qa5#

Anticipated by 267544(1963)

There are these versions: 87364

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(b);SBLOCK::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Vars
        • P(b);SBLOCK::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(b);SBLOCK::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • P(b);SBLOCK::QAR(A)
      • P(b);SBLOCK::QAB(A)
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