MESON Chess Problem Database

Problem Display
PID: 215961 (k1N5/ppK5/8/1P6/7R/8/8/8 w - - 0 1)

Zalokotsky, Roman Fedorovich (aka Fedorovich, Roman)

Land og Folk, 1979

k1N5/ppK5/8/1P6/7R/8/8/8

#2

4 + 3

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sxa7?
      • 1...Kxa7
        • 2.Ra4#
      • 1...b6!
    • 1.Ra4?
      • threat
        • 2.Sb6#
        • 2.Rxa7#
      • 1...a5
        • 2.Rxa5#
      • 1...b6
        • 2.Sxb6#
        • 2.Rxa7#
      • 1...a6!
  • Keys
    • 1.Sb6+!
      • 1...axb6
        • 2.Ra4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);XP(a)
      • Vars
        • K(c);OGATEB,P-FLIGHT,XS(D)::R(A)
      • Refutation
        • P(b);
    • Try
      • R(A);P_PINP(a)
      • Threat
        • DUALS(2)
      • Vars
        • P(a);OGATEB::R(A),XP(a)
      • Refutation
        • P(a);
  • Actual
    • S(D);CHECK
    • Vars
      • P(a);XS(D)::R(A)
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