MESON Chess Problem Database

Problem Display
PID: 228782 (8/8/1K6/8/k7/1R1nN3/3N4/1n6 w - - 0 1)

Lokker, Miklosh S

Deutsche Schachzeitung, 1974

8/8/1K6/8/k7/1R1nN3/3N4/1n6

#2

4 + 3

15148 Sadier Collection 2021
5454 Near Snap 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Sd1?
      • 1...Sa3
        • 2.Sc3#
      • 1...Sc3
        • 2.Sxc3#
      • 1...Sc1
        • 2.Sb2#
      • 1...Se1
        • 2.Sb2#
      • 1...Sb2
        • 2.Sxb2#
      • 1...Sf2
        • 2.Sb2#
      • 1...Sb4
        • 2.Sb2#
      • 1...Sf4
        • 2.Sb2#
      • 1...Sc5
        • 2.Sb2#
      • 1...Se5
        • 2.Sb2#
      • 1...Sxd2!
  • Keys
    • 1.Sc2!
      • 1...Sxd2
        • 2.Ra3#
      • 1...Sa3
        • 2.Rxa3#
      • 1...Sc3
        • 2.Ra3#
      • 1...Sc1
        • 2.Rb4#
      • 1...Se1
        • 2.Rb4#
      • 1...Sb2
        • 2.Rb4#
      • 1...Sf2
        • 2.Rb4#
      • 1...Sb4
        • 2.Rxb4#
      • 1...Sf4
        • 2.Rb4#
      • 1...Sc5
        • 2.Rb4#
      • 1...Se5
        • 2.Rb4#

Anticipated by 46468(1963)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • S(a);N_GUARD::S(C)
        • S(a);N_GUARD::S(C),XS(a)
        • S(b);N_GUARD::S(C)
        • S(b);N_GUARD::S(C),XS(b)
      • Refutation
        • S(a);XS(A)
  • Actual
    • S(C);
    • Vars
      • S(a);N_GUARD,XS(A)::R1(B)
      • S(a);N_GUARD::R1(B),XS(a)
      • S(a);N_GUARD::R1(B)
      • S(b);N_GUARD::R1(B)
      • S(b);N_GUARD::R1(B),XS(b)
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