MESON Chess Problem Database

Problem Display
PID: 178634 (8/8/8/3Q1P2/8/5N1P/6k1/4K2R w K - 0 1)

Jonsson, Christer

2/4 HM., Springaren, 1984

8/8/8/3Q1P2/8/5N1P/6k1/4K2R

#2

6 + 1

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qc4?
      • 1...Kxh1
        • 2.Qf1#
      • 1...Kg3
        • 2.Qg4#
      • 1...Kxf3!
    • 1.Qe4?
      • 1...Kg3
        • 2.Qg4#
      • 1...Kxh1!
    • 1.Qg8+?
      • 1...Kxh1
        • 2.Qg1#
      • 1...Kxf3!
    • 1.Qd1?
      • 1...Kxh1
        • 2.Kf2#
      • 1...Kg3!
    • 1.Qd3?
      • 1...Kxh1
        • 2.Qf1#
      • 1...Kg3!
    • 1.Qd4?
      • 1...Kxh1
        • 2.Qg1#
      • 1...Kg3
        • 2.Qg4#
      • 1...Kxf3!
    • 1.Qd6?
      • 1...Kxh1
        • 2.Qh2#
      • 1...Kxf3!
  • Keys
    • 1.Qe5!
      • 1...Kxh1
        • 2.Qh2#
      • 1...Kxf3
        • 2.0-0#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT,XR(B)::QAR2(E)
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • Q(E);
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XR(B)::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT,XR(B)::QAR(E)+K(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT,XR(B)::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT,XR(B)::QAR1(E)
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT,XR(B)::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT,XR(B)::QAR1(E)
      • K(a);S_FLIGHT,XS(C)::0-0
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