MESON Chess Problem Database

Problem Display
PID: 28294 (2n1k1B1/2K2NRN/8/8/8/8/8/8 w - - 0 1)

Andrade, Barry Jack da Costa

Six Hundred Problems, 0000

2n1k1B1/2K2NRN/8/8/8/8/8/8

#2

5 + 2

3242 BCPS Rapid Solving (Cheltenham) 2001
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke7
      • 2.Sd6#
    • 1...Sb6
      • 2.Sd6#
    • 1...Sd6
      • 2.Sxd6#
    • 1...Sa7
      • 2.Sd6#
    • 1...Se7
      • 2.Sd6#
  • Tries
    • 1.Rg1?
      • 1...Ke7
        • 2.Re1#
      • 1...Sb6
        • 2.Re1#
      • 1...Sa7
        • 2.Re1#
      • 1...Se7
        • 2.Sd6#
      • 1...Sd6!
    • 1.Rg2?
      • 1...Ke7
        • 2.Re2#
      • 1...Sb6
        • 2.Re2#
      • 1...Sa7
        • 2.Re2#
      • 1...Se7
        • 2.Sd6#
      • 1...Sd6!
    • 1.Rg3?
      • 1...Ke7
        • 2.Re3#
      • 1...Sb6
        • 2.Re3#
      • 1...Sa7
        • 2.Re3#
      • 1...Se7
        • 2.Sd6#
      • 1...Sd6!
    • 1.Rg4?
      • 1...Ke7
        • 2.Re4#
      • 1...Sb6
        • 2.Re4#
      • 1...Sa7
        • 2.Re4#
      • 1...Se7
        • 2.Sd6#
      • 1...Sd6!
    • 1.Rg6?
      • 1...Sd6
        • 2.Re6#
      • 1...Sb6
        • 2.Re6#
      • 1...Sa7
        • 2.Re6#
      • 1...Se7
        • 2.Sd6#
      • 1...Ke7!
  • Keys
    • 1.Rg5!
      • 1...Ke7
        • 2.Re5#
      • 1...Sd6
        • 2.Re5#
      • 1...Sb6
        • 2.Re5#
      • 1...Sa7
        • 2.Re5#
      • 1...Se7
        • 2.Sd6#

This anticipates 218851(1987)

FEATURES

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