MESON Chess Problem Database

Problem Display
PID: 134703 (5N1k/4Nr2/1Q2PP2/8/6p1/6K1/8/8 w - - 0 1)

Prikryl, Bohuzlav

Wiener Schachzeitung, 1901

5N1k/4Nr2/1Q2PP2/8/6p1/6K1/8/8

#2

6 + 3

5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rh7
      • 2.Sfg6#
  • Tries
    • 1.Qd4?
      • 1...Rxf6
        • 2.Qxf6#
      • 1...Rxe7
        • 2.f7#
      • 1...Rg7
        • 2.fxg7#
      • 1...Rh7
        • 2.Sfg6#
      • 1...Rxf8!
  • Keys
    • 1.Qb2!
      • 1...Rxf6
        • 2.Qxf6#
      • 1...Rxe7
        • 2.f7#
      • 1...Rxf8
        • 2.Qh2#
      • 1...Rg7
        • 2.fxg7#
      • 1...Rh7
        • 2.Sfg6#

This anticipates 175058(1902)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK::S(F)
  • Tries
    • Try
      • Q(B);
      • Vars
        • R(b);OGATE,P_SPINR(b),XP(D)::QAB(B),XR(b)
        • R(b);OGATE,XS(E)::QAB(B)+P(D)
        • R(b);OGATE::P(D),XR(b)
        • R(b);SBLOCK::S(F)
      • Refutation
        • R(b);XS(F)
  • Actual
    • Q(B);
    • Vars
      • R(b);OGATE,P_SPINR(b),XP(D)::QAB(B),XR(b)
      • R(b);OGATE,XS(E)::QAB(B)+P(D)
      • R(b);N_GUARD,XS(F)::QAR(B)
      • R(b);OGATE::P(D),XR(b)
      • R(b);SBLOCK::S(F)
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