MESON Chess Problem Database

Problem Display
PID: 21570 (k7/1R6/nK6/8/8/8/8/8 w - - 0 1)

Dehler, Otto Georg Edgar

Neue Welt, 1919

k7/1R6/nK6/8/8/8/8/8

#2

2 + 2

4349 Kleinste Schachaufgaben Drei- und Viersteiner 1970
136 Problem Observer 1972
2012 Miniature Chess Problems from Many Countries 1981
3310 2345 Chess Problems 1997
23 Die Schwalbe 2010
3713 Snap 2010
15148 Sadier Collection 2013
5454 Near Snap 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Sb8
      • 2.Ra7#
  • Tries
    • 1.Re7?
      • 1...Kb8
        • 2.Re8#
      • 1...Sb4
        • 2.Re8#
      • 1...Sc5
        • 2.Re8#
      • 1...Sb8
        • 2.Ra7#
      • 1...Sc7!
    • 1.Rf7?
      • 1...Kb8
        • 2.Rf8#
      • 1...Sb4
        • 2.Rf8#
      • 1...Sc5
        • 2.Rf8#
      • 1...Sb8
        • 2.Ra7#
      • 1...Sc7!
    • 1.Rg7?
      • 1...Kb8
        • 2.Rg8#
      • 1...Sb4
        • 2.Rg8#
      • 1...Sc5
        • 2.Rg8#
      • 1...Sb8
        • 2.Ra7#
      • 1...Sc7!
    • 1.Rh7?
      • 1...Kb8
        • 2.Rh8#
      • 1...Sb4
        • 2.Rh8#
      • 1...Sc5
        • 2.Rh8#
      • 1...Sb8
        • 2.Ra7#
      • 1...Sc7!
  • Keys
    • 1.Rd7!
      • 1...Kb8
        • 2.Rd8#
      • 1...Sb4
        • 2.Rd8#
      • 1...Sc5
        • 2.Rd8#
      • 1...Sc7
        • 2.Rd8#
      • 1...Sb8
        • 2.Ra7#

This anticipates 137402(1929), 110025(1929-1931), 249395(1975)

There are these versions: 21569

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(a);SBLOCK::R1(B)
  • Tries
    • Try
      • R(B);
      • Vars
        • K(b);P-FLIGHT::R(B)
        • S(a);N_GUARD::R(B)
        • S(a);SBLOCK::R1(B)
      • Refutation
        • S(a);
    • Try
      • R(B);
      • Vars
        • K(b);P-FLIGHT::R(B)
        • S(a);N_GUARD::R(B)
        • S(a);SBLOCK::R1(B)
      • Refutation
        • S(a);
    • Try
      • R(B);
      • Vars
        • K(b);P-FLIGHT::R(B)
        • S(a);N_GUARD::R(B)
        • S(a);SBLOCK::R1(B)
      • Refutation
        • S(a);
    • Try
      • R(B);
      • Vars
        • K(b);P-FLIGHT::R(B)
        • S(a);N_GUARD::R(B)
        • S(a);SBLOCK::R1(B)
      • Refutation
        • S(a);
  • Actual
    • R(B);
    • Vars
      • K(b);P-FLIGHT::R(B)
      • S(a);N_GUARD::R(B)
      • S(a);SBLOCK::R1(B)
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