MESON Chess Problem Database

Problem Display
PID: 196517 (8/8/7p/7K/2Q5/4PN1N/3P2k1/8 w - - 0 1)

Lewis, Robert Tony

Suomen Shakki, 1985

8/8/7p/7K/2Q5/4PN1N/3P2k1/8

#2

6 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Kh1
      • 2.Qf1#
    • 1...Kxf3
      • 2.Qg4#
    • 1...Kg3
      • 2.Qg4#
    • 1...Kxh3
      • 2.Qg4#
  • Tries
    • 1.Kg4?
      • 1...Kh1
        • 2.Qf1#
      • 1...h5+!
    • 1.Kh4?
      • 1...Kh1
        • 2.Qf1#
      • 1...Kxf3
        • 2.Qg4#
      • 1...h5!
    • 1.Qe2+?
      • 1...Kh1
        • 2.Qf1#
        • 2.Qh2#
      • 1...Kxh3
        • 2.Qh2#
      • 1...Kg3!
    • 1.Qg8+?
      • 1...Kh1
        • 2.Sf2#
        • 2.Qg1#
      • 1...Kxf3
        • 2.Qg4#
      • 1...Kxh3
        • 2.Qg4#
      • 1...Kf1!
    • 1.Qf4?
      • 1...Kh1
        • 2.Qh2#
      • 1...Kxh3
        • 2.Qh2#
        • 2.Qg4#
      • 1...Kf1!
    • 1.Qg4+?
      • 1...Kh1
        • 2.Sf2#
        • 2.Qg1#
      • 1...Kf1!
  • Keys
    • 1.Qh4!
      • 1...Kf1
        • 2.Qf2#
      • 1...Kh1
        • 2.Sf4#
      • 1...Kxf3
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(a);S_FLIGHT::QAR2(E)
    • K(a);S_FLIGHT,XS(C)::QAB1(E)
    • K(a);P-FLIGHT::QAR1(E)
    • K(a);S_FLIGHT,XS(D)::QAB1(E)
  • Tries
    • Try
      • K(F);S_FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAR2(E)
      • Refutation
        • P(b);CHECK
    • Try
      • K(F);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAR2(E)
        • K(a);S_FLIGHT,XS(C)::QAB1(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(D)::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAB1(E)
        • K(a);S_FLIGHT,XS(D)::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT::QAR1(E)
      • K(a);S_FLIGHT::QAR(E)+S(D)
      • K(a);S_FLIGHT,XS(C)::QAB1(E)
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