MESON Chess Problem Database

Problem Display
PID: 87470 (8/8/8/6QP/8/5PN1/6k1/4K2R w - - 0 1)

Christiaans, Frank

The Problemist, 1993

8/8/8/6QP/8/5PN1/6k1/4K2R

#2

6 + 1

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sf1+?
      • 1...Kxf3
        • 2.Sd2#
      • 1...Kxh1!
    • 1.Se2+?
      • 1...Kxh1
        • 2.Qg1#
      • 1...Kxf3!
    • 1.Se4+?
      • 1...Kxf3
        • 2.Sd2#
      • 1...Kxh1!
    • 1.Rh2+?
      • 1...Kg1
        • 2.Sf1#
      • 1...Kxf3
        • 2.Rf2#
      • 1...Kxh2!
    • 1.Rh4?
      • 1...Kg1
        • 2.Sf1#
        • 2.Sh1#
        • 2.Se2#
        • 2.Se4#
        • 2.Sf5#
      • 1...Kxf3!
  • Keys
    • 1.Qf5!
      • 1...Kxg3
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(a);S_FLIGHT,XP(C)::S(D)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • S(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XR(B)::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XP(C)
    • Try
      • S(D);CHECK
      • Vars
        • K(a);S_FLIGHT,XP(C)::S(D)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • R(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR(E)+S(D)
        • K(a);OGATE,S_FLIGHT,XP(C)::R1(B)
      • Refutation
        • K(a);P-FLIGHT,XR(B)
    • Try
      • R(B);
      • Refutation
        • K(a);S_FLIGHT,XP(C)
  • Actual
    • Q(E);
    • Vars
      • K(a);OGATEB,P-FLIGHT,XS(D)::QAR1(E)
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