MESON Chess Problem Database

Problem Display
PID: 146146 (5q1k/5BRN/5P1K/8/8/8/8/8 w - - 0 1)

Lipton, Michael

The Problemist, 1953

5q1k/5BRN/5P1K/8/8/8/8/8

#2

5 + 2

14867 BCPS Library 2012
3713 Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Rg8#
    • 1...Qb4
      • 2.Rg8#
    • 1...Qc5
      • 2.Rg8#
    • 1...Qd6
      • 2.Rg8#
    • 1...Qe7
      • 2.Rg8#
    • 1...Qxg7+
      • 2.fxg7#
    • 1...Qg8
      • 2.Rxg8#
  • Keys
    • 1.Sg5!
      • 1...Qxg7+
        • 2.fxg7#
      • 1...Qxf7
        • 2.Sxf7#
      • 1...Qa3
        • 2.Rh7#
        • 2.Rg8#
      • 1...Qb4
        • 2.Rh7#
        • 2.Rg8#
      • 1...Qc5
        • 2.Rh7#
        • 2.Rg8#
      • 1...Qd6
        • 2.Rh7#
        • 2.Rg8#
      • 1...Qe7
        • 2.Rh7#
        • 2.Rg8#
      • 1...Qa8
        • 2.Rh7#
      • 1...Qb8
        • 2.Rh7#
      • 1...Qc8
        • 2.Rh7#
      • 1...Qd8
        • 2.Rh7#
      • 1...Qe8
        • 2.Rh7#
      • 1...Qg8
        • 2.Rxg8#

Anticipated by 183158(1907)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_PINR(D)::R1(D)
    • Q(a);N_PINR(D),P_PINP(A)::R1(D)
    • Q(a);CHECK,OGATE,XR(D)::P(A),XQ(a)
    • Q(a);N_PINR(D)::R1(D),XQ(a)
  • Actual
    • S(E);
    • Vars
      • Q(a);CHECK,OGATE,XR(D)::P(A),XQ(a)
      • Q(a);N_PINR(D),XB(C)::S(E),XQ(a)
      • Q(a);N_PINR(D),SBLOCK::R1(D)
      • Q(a);N_PINR(D)::R1(D)
      • Q(a);N_PINR(D)::R1(D),XQ(a)
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