MESON Chess Problem Database

Problem Display
PID: 92261 (8/1R4p1/3K1k2/1R6/N7/8/2B5/8 w - - 0 1)

Lokker, Miklosh S

Deutsche Schachzeitung, 1967

8/1R4p1/3K1k2/1R6/N7/8/2B5/8

#2

5 + 2

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sb6?
      • 1...g5
        • 2.Sd5#
      • 1...g6!
    • 1.Re5?
      • 1...g5
        • 2.Re6#
      • 1...g6!
    • 1.Rg5?
      • threat
        • 2.Rg6#
      • 1...g6
        • 2.Rxg6#
      • 1...Kxg5!
    • 1.Rh5?
      • 1...g5
        • 2.Rh6#
      • 1...g6!
  • Keys
    • 1.Sc3!
      • 1...g6
        • 2.Se4#
      • 1...g5
        • 2.Sd5#

This anticipates 108309(1997)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Vars
        • P(b);SBLOCK::S(B)
      • Refutation
        • P(b);
    • Try
      • R(C);
      • Vars
        • P(b);SBLOCK::R1(C)
      • Refutation
        • P(b);
    • Try
      • R(C);
      • Threat
        • R1(C)
      • Vars
        • P(b);::R1(C),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
    • Try
      • R(C);
      • Vars
        • P(b);N_GUARD,SBLOCK::R(C)
      • Refutation
        • P(b);
  • Actual
    • S(B);
    • Vars
      • P(b);SBLOCK::S(B)
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