MESON Chess Problem Database

Problem Display
PID: 87786 (1R3B2/8/K2N4/8/k1n5/7R/8/8 w - - 0 1)

Shanahan, Ian

The Problemist, 1993

1R3B2/8/K2N4/8/k1n5/7R/8/8

#2

5 + 2

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sb5?
      • threat
        • 2.Sc3#
      • 1...Sb6
        • 2.Ra3#
      • 1...Sd6!
    • 1.Sb7?
      • threat
        • 2.Sc5#
      • 1...Sb6
        • 2.Ra3#
      • 1...Se3!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sc3#
        • 2.Sc5#
        • 2.Rb4#
      • 1...Se3
        • 2.Sc3#
      • 1...Sb6
        • 2.Ra3#
      • 1...Sd6
        • 2.Sc5#

Anticipated by 18494(1956), 80291(1968), 85939(1989)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • S(b);N_GUARD::R1(A)
      • Refutation
        • S(b);
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • S(b);N_GUARD::R1(A)
      • Refutation
        • S(b);
  • Actual
    • S(C);
    • Threat
      • DUALS(3)
    • Vars
      • S(b);::S(C)
      • S(b);N_GUARD::R1(A)
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