MESON Chess Problem Database

Problem Display
PID: 23344 (8/8/8/8/4p3/3nK3/R5R1/3k4 w - - 0 1)

Lester, William Edward

Chess Amateur (The), 1924

8/8/8/8/4p3/3nK3/R5R1/3k4

#2

3 + 3

2786 More Fun with Chess Miniatures 2000
3713 Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc1
      • 2.Ra1#
    • 1...Ke1
      • 2.Rg1#
    • 1...Sc1
      • 2.Rg1#
    • 1...Se1
      • 2.Ra1#
    • 1...Sb2
      • 2.Ra1#
    • 1...Sf2
      • 2.Rg1#
    • 1...Sb4
      • 2.Ra1#
      • 2.Rg1#
    • 1...Sf4
      • 2.Ra1#
      • 2.Rg1#
    • 1...Sc5
      • 2.Ra1#
      • 2.Rg1#
    • 1...Se5
      • 2.Ra1#
      • 2.Rg1#
  • Tries
    • 1.Kd4?
      • 1...Kc1
        • 2.Ra1#
      • 1...Ke1
        • 2.Rg1#
      • 1...Sc1
        • 2.Rg1#
      • 1...Se1
        • 2.Ra1#
      • 1...Sb2
        • 2.Ra1#
      • 1...Sf2
        • 2.Rg1#
      • 1...Sb4
        • 2.Ra1#
        • 2.Rg1#
      • 1...Sf4
        • 2.Ra1#
        • 2.Rg1#
      • 1...Sc5
        • 2.Ra1#
        • 2.Rg1#
      • 1...Se5
        • 2.Ra1#
        • 2.Rg1#
      • 1...e3!
    • 1.Rad2+?
      • 1...Ke1
        • 2.Rg1#
      • 1...Kc1!
    • 1.Rgd2+?
      • 1...Kc1
        • 2.Ra1#
      • 1...Ke1!
    • 1.Rh2?
      • 1...Kc1
        • 2.Ra1#
      • 1...Ke1
        • 2.Rh1#
      • 1...Sc1
        • 2.Rh1#
      • 1...Se1
        • 2.Ra1#
      • 1...Sb2
        • 2.Ra1#
      • 1...Sb4
        • 2.Ra1#
        • 2.Rh1#
      • 1...Sf4
        • 2.Ra1#
        • 2.Rh1#
      • 1...Sc5
        • 2.Ra1#
        • 2.Rh1#
      • 1...Se5
        • 2.Ra1#
        • 2.Rh1#
      • 1...Sf2!
  • Keys
    • 1.Rge2!
      • 1...Kc1
        • 2.Ra1#
      • 1...Sc1
        • 2.Rad2#
      • 1...Se1
        • 2.Ra1#
      • 1...Sb2
        • 2.Ra1#
      • 1...Sf2
        • 2.Ra1#
      • 1...Sb4
        • 2.Ra1#
      • 1...Sf4
        • 2.Ra1#
      • 1...Sc5
        • 2.Ra1#
      • 1...Se5
        • 2.Ra1#

This anticipates 209319(1984)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::R(A)
    • K(a);P-FLIGHT::R(B)
    • S(b);N_GUARD,SBLOCK::R(B)
    • S(b);N_GUARD,SBLOCK::R(A)
    • S(b);N_GUARD::R(A)
    • S(b);N_GUARD::R(B)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT::R(A)
        • K(a);P-FLIGHT::R(B)
        • S(b);N_GUARD,SBLOCK::R(B)
        • S(b);N_GUARD,SBLOCK::R(A)
        • S(b);N_GUARD::R(A)
        • S(b);N_GUARD::R(B)
      • Refutation
        • P(c);
    • Try
      • R(A);CHECK
      • Vars
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(a);P-FLIGHT::R(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);
      • Vars
        • K(a);P-FLIGHT::R(A)
        • K(a);P-FLIGHT::R(B)
        • S(b);N_GUARD,SBLOCK::R(B)
        • S(b);N_GUARD,SBLOCK::R(A)
        • S(b);N_GUARD::R(A)
      • Refutation
        • S(b);
  • Actual
    • R(B);
    • Vars
      • K(a);P-FLIGHT::R(A)
      • S(b);SBLOCK::R1(A)
      • S(b);N_GUARD::R(A)
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