MESON Chess Problem Database

Problem Display
PID: 231404 (1rB5/Rp1K4/1kPP4/R7/1P6/8/8/8 w - - 0 1)

Goldschmidt, Ervin

4th Comm., Nepszava, 1927

1rB5/Rp1K4/1kPP4/R7/1P6/8/8/8

#2

7 + 3

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra8
      • 2.Rxb7#
    • 1...Rxc8
      • 2.Rxb7#
    • 1...bxc6
      • 2.R7a6#
  • Tries
    • 1.c7?
      • 1...Ra8
        • 2.Rxb7#
      • 1...Rxc8!
  • Keys
    • 1.cxb7!
      • threat
        • 2.R7a6#
      • 1...Rxb7+
        • 2.Rxb7#
      • 1...Rxc8
        • 2.bxc8S#
      • 1...Ra8
        • 2.bxa8S#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(c);N_GUARD::R1(E),XP(b)
    • R(c);N_GUARD,XB(G)::R1(E),XP(b)
    • P(b);N_GUARD,XP(C)::R1(E)
  • Tries
    • Try
      • P(C);
      • Vars
        • R(c);N_GUARD::R1(E),XP(b)
      • Refutation
        • R(c);XB(G)
  • Actual
    • P(C);XP(b)
    • Threat
      • R1(E)
    • Vars
      • R(c);CHECK,OGATE,XP(C)::R1(E),XR(c)
      • R(c);OGATE,XB(G)::PXR(c)=S
      • R(c);OGATE::PXR(c)=S
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