MESON Chess Problem Database

Problem Display
PID: 234775 (k7/1n1RN3/1K6/P3R3/8/8/8/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2016

k7/1n1RN3/1K6/P3R3/8/8/8/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sxa5
      • 2.Rd8#
    • 1...Sc5
      • 2.Rd8#
    • 1...Sd8
      • 2.Rxd8#
  • Tries
    • 1.Rc5?
      • threat
        • 2.Rc8#
      • 1...Kb8
        • 2.Rc8#
      • 1...Sxc5
        • 2.Rd8#
      • 1...Sd6!
    • 1.Rc7?
      • threat
        • 2.Rc8#
      • 1...Kb8
        • 2.Rc8#
      • 1...Sd6!
  • Keys
    • 1.Sc6!
      • 1...Sxa5
        • 2.Rxa5#
        • 2.Re8#
        • 2.Ra7#
        • 2.Rd8#
      • 1...Sd6
        • 2.Ra7#
      • 1...Sc5
        • 2.Re8#
        • 2.Ra7#
        • 2.Rd8#
      • 1...Sd8
        • 2.Ra7#
        • 2.Rxd8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD,XP(A)::R(D)
    • S(a);N_GUARD::R(D)
    • S(a);N_GUARD::R(D),XS(a)
  • Tries
    • Try
      • R(B);
      • Threat
        • R(B)
      • Vars
        • K(b);P-FLIGHT::R1(B)
        • S(a);N_GUARD,XR(B)::R(D)
      • Refutation
        • S(a);
    • Try
      • R(D);
      • Threat
        • R(D)
      • Vars
        • K(b);P-FLIGHT::R1(D)
      • Refutation
        • S(a);
  • Actual
    • S(E);
    • Vars
      • S(a);OGATE::R1(D)
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