MESON Chess Problem Database

Problem Display
PID: 89108 (8/8/8/8/8/4N2n/2R5/R3K2k w Q - 0 1)

Rice, John Michael

The Problemist, 1992

8/8/8/8/8/4N2n/2R5/R3K2k

#2

4 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kg1
      • 2.0-0-0#
    • 1...Sf4
      • 2.0-0-0#
    • 1...Sg5
      • 2.0-0-0#
  • Tries
    • 1.Sf5?
      • 1...Kg1
        • 2.0-0-0#
      • 1...Sg1
        • 2.Sg3#
      • 1...Sf4
        • 2.0-0-0#
      • 1...Sg5
        • 2.0-0-0#
      • 1...Sf2!
    • 1.Rg2?
      • 1...Sf2
        • 2.Kxf2#
      • 1...Sf4
        • 2.Kd2#
        • 2.Kf2#
        • 2.0-0-0#
      • 1...Sg5
        • 2.Kd2#
        • 2.Ke2#
        • 2.Kf2#
        • 2.0-0-0#
      • 1...Sg1!
  • Keys
    • 1.Sg4!
      • 1...Kg1
        • 2.0-0-0#
      • 1...Sf2
        • 2.Kxf2#
      • 1...Sg1
        • 2.Rh2#
      • 1...Sf4
        • 2.Kf2#
        • 2.0-0-0#
      • 1...Sg5
        • 2.Kf2#
        • 2.0-0-0#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • K(a);P-FLIGHT::0-0-0
    • S(b);N_GUARD::0-0-0
  • Tries
    • Try
      • S(D);
      • Vars
        • K(a);P-FLIGHT::0-0-0
        • S(b);SBLOCK::S(D)
        • S(b);N_GUARD::0-0-0
      • Refutation
        • S(b);
    • Try
      • R(C);
      • Vars
        • S(b);::R(A)+K(B),XS(b)
      • Refutation
        • S(b);
  • Actual
    • S(D);
    • Vars
      • K(a);P-FLIGHT::0-0-0
      • S(b);::R(A)+K(B),XS(b)
      • S(b);SBLOCK::R1(C)
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