MESON Chess Problem Database

Problem Display
PID: 219467 (8/8/nK6/8/k7/3R4/PP6/8 w - - 0 1)

Speckmann, Werner

Schach-Report, 1991

8/8/nK6/8/k7/3R4/PP6/8

#2

4 + 2

6490 yacpdb 2020
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kb4
      • 2.Rd4#
    • 1...Sb4
      • 2.Ra3#
    • 1...Sc5
      • 2.Rd4#
    • 1...Sc7
      • 2.Rd4#
    • 1...Sb8
      • 2.Rd4#
  • Tries
    • 1.Rd1?
      • 1...Kb4
        • 2.Rd4#
      • 1...Sc5
        • 2.Rd4#
      • 1...Sc7
        • 2.Rd4#
      • 1...Sb8
        • 2.Rd4#
      • 1...Sb4!
    • 1.Rd2?
      • 1...Kb4
        • 2.Rd4#
      • 1...Sc5
        • 2.Rd4#
      • 1...Sc7
        • 2.Rd4#
      • 1...Sb8
        • 2.Rd4#
      • 1...Sb4!
    • 1.Rc3?
      • 1...Sb4
        • 2.Ra3#
      • 1...Sc5
        • 2.Rc4#
      • 1...Sc7
        • 2.Rc4#
      • 1...Sb8
        • 2.Rc4#
      • 1...Kb4!
    • 1.Re3?
      • 1...Kb4
        • 2.Re4#
      • 1...Sb4
        • 2.Ra3#
      • 1...Sc7
        • 2.Re4#
      • 1...Sb8
        • 2.Re4#
      • 1...Sc5!
    • 1.Rf3?
      • 1...Kb4
        • 2.Rf4#
      • 1...Sb4
        • 2.Ra3#
      • 1...Sc7
        • 2.Rf4#
      • 1...Sb8
        • 2.Rf4#
      • 1...Sc5!
    • 1.Rg3?
      • 1...Kb4
        • 2.Rg4#
      • 1...Sb4
        • 2.Ra3#
      • 1...Sc7
        • 2.Rg4#
      • 1...Sb8
        • 2.Rg4#
      • 1...Sc5!
    • 1.Rh3?
      • 1...Kb4
        • 2.Rh4#
      • 1...Sb4
        • 2.Ra3#
      • 1...Sc7
        • 2.Rh4#
      • 1...Sb8
        • 2.Rh4#
      • 1...Sc5!
    • 1.Rd6?
      • 1...Kb4
        • 2.Rd4#
      • 1...Sc5
        • 2.Rd4#
      • 1...Sc7
        • 2.Rd4#
      • 1...Sb8
        • 2.Rd4#
      • 1...Sb4!
    • 1.Rd7?
      • 1...Kb4
        • 2.Rd4#
      • 1...Sc5
        • 2.Rd4#
      • 1...Sc7
        • 2.Rd4#
      • 1...Sb8
        • 2.Rd4#
      • 1...Sb4!
    • 1.Rd8?
      • 1...Kb4
        • 2.Rd4#
      • 1...Sc5
        • 2.Rd4#
      • 1...Sc7
        • 2.Rd4#
      • 1...Sb8
        • 2.Rd4#
      • 1...Sb4!
  • Keys
    • 1.Rd5!
      • 1...Kb4
        • 2.Rd4#
      • 1...Sc5
        • 2.Rd4#
      • 1...Sb4
        • 2.Ra5#
      • 1...Sc7
        • 2.Rd4#
      • 1...Sb8
        • 2.Rd4#

Anticipated by 219465(1990)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::R(C)
    • S(b);SBLOCK::R1(C)
    • S(b);N_GUARD::R(C)
  • Tries
    • Try
      • R(C);
      • Vars
        • K(a);P-FLIGHT::R(C)
        • S(b);N_GUARD::R(C)
      • Refutation
        • S(b);
    • Try
      • R(C);
      • Vars
        • K(a);P-FLIGHT::R(C)
        • S(b);N_GUARD::R(C)
      • Refutation
        • S(b);
    • Try
      • R(C);
      • Vars
        • S(b);SBLOCK::R1(C)
        • S(b);N_GUARD::R(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(C);
      • Vars
        • K(a);P-FLIGHT::R(C)
        • S(b);SBLOCK::R1(C)
        • S(b);N_GUARD::R(C)
      • Refutation
        • S(b);
    • Try
      • R(C);
      • Vars
        • K(a);P-FLIGHT::R(C)
        • S(b);SBLOCK::R1(C)
        • S(b);N_GUARD::R(C)
      • Refutation
        • S(b);
    • Try
      • R(C);
      • Vars
        • K(a);P-FLIGHT::R(C)
        • S(b);SBLOCK::R1(C)
        • S(b);N_GUARD::R(C)
      • Refutation
        • S(b);
    • Try
      • R(C);
      • Vars
        • K(a);P-FLIGHT::R(C)
        • S(b);SBLOCK::R1(C)
        • S(b);N_GUARD::R(C)
      • Refutation
        • S(b);
    • Try
      • R(C);
      • Vars
        • K(a);P-FLIGHT::R(C)
        • S(b);N_GUARD::R(C)
      • Refutation
        • S(b);
    • Try
      • R(C);
      • Vars
        • K(a);P-FLIGHT::R(C)
        • S(b);N_GUARD::R(C)
      • Refutation
        • S(b);
    • Try
      • R(C);
      • Vars
        • K(a);P-FLIGHT::R(C)
        • S(b);N_GUARD::R(C)
      • Refutation
        • S(b);
  • Actual
    • R(C);
    • Vars
      • K(a);P-FLIGHT::R(C)
      • S(b);N_GUARD::R(C)
      • S(b);SBLOCK::R1(C)
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