MESON Chess Problem Database

Problem Display
PID: 37462 (2Q3N1/3R4/3K4/R5p1/2B3k1/2N5/7P/6B1 w - - 0 1)

Pniak, Edmund Jan

Prize, Polski Zwiazek Problemistow, 1950

2Q3N1/3R4/3K4/R5p1/2B3k1/2N5/7P/6B1

#2

9 + 2

3713 Snap 2001
133 The Problemist Supplement 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Rf7#
    • 1...Kh4
      • 2.Rh7#
  • Tries
    • 1.Bf1?
      • 1...Kf3
        • 2.Rf7#
      • 1...Kf4
        • 2.Rf7#
      • 1...Kh4
        • 2.Rh7#
      • 1...Kh5!
    • 1.Be2+?
      • 1...Kf4
        • 2.Rf7#
        • 2.Qc4#
        • 2.Qf8#
      • 1...Kh4
        • 2.Rh7#
      • 1...Kh3!
    • 1.Rf7+?
      • 1...Kh4
        • 2.Rh7#
      • 1...Kh5!
    • 1.Rg7+?
      • 1...Kf4
        • 2.Rf7#
        • 2.Qf5#
      • 1...Kh4
        • 2.Rh7#
      • 1...Kh5
        • 2.Qh3#
      • 1...Kf3!
    • 1.Rh7+?
      • 1...Kf4
        • 2.Rf7#
        • 2.Qf5#
      • 1...Kf3!
  • Keys
    • 1.Ra4!
      • 1...Kf3
        • 2.Bd5#
      • 1...Kh3
        • 2.Bf1#
      • 1...Kf4
        • 2.Rf7#
      • 1...Kh4
        • 2.Rh7#
      • 1...Kf5
        • 2.Bd3#
      • 1...Kh5
        • 2.Bf7#

This anticipates 37468(1969-1970)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::R(G)
  • Tries
    • Try
      • B(D);
      • Vars
        • K(a);S_FLIGHT::R(G)
        • K(a);P-FLIGHT::R(G)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • B(D);CHECK
      • Vars
        • K(a);P-FLIGHT::R(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(G);CHECK
      • Vars
        • K(a);P-FLIGHT::R(G)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • R(G);CHECK,P_PINP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::R(G)
        • K(a);OGATE,S_FLIGHT::QAR2(H)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • R(G);CHECK
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • R(E);
    • Vars
      • K(a);S_FLIGHT::B(D)
      • K(a);P-FLIGHT::R(G)
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