MESON Chess Problem Database

Problem Display
PID: 46390 (8/8/8/8/2Q3N1/4K3/6kp/5N1r w - - 0 1)

Lincoln, Robert A

Still More Fun with Chess Miniatures, 2002

8/8/8/8/2Q3N1/4K3/6kp/5N1r

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Qa2+?
      • 1...Kxf1
        • 2.Qf2#
      • 1...Kg1
        • 2.Qf2#
      • 1...Kh3!
    • 1.Qe2+?
      • 1...Kg1
        • 2.Qf2#
      • 1...Kh3!
    • 1.Qc2+?
      • 1...Kxf1
        • 2.Qf2#
      • 1...Kg1
        • 2.Qf2#
      • 1...Kh3!
    • 1.Qe4+?
      • 1...Kxf1
        • 2.Qxh1#
      • 1...Kh3
        • 2.Sf2#
      • 1...Kg1!
  • Keys
    • 1.Qf4!
      • 1...Kg1
        • 2.Qf2#
      • 1...Kh3
        • 2.Qg3#
      • 1...Rxf1
        • 2.Qxh2#
      • 1...Rg1
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);S_FLIGHT,XS(A)::QAR1(C)
        • K(b);P-FLIGHT::QAB1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);S_FLIGHT,XS(A)::QAR1(C)
        • K(b);P-FLIGHT::QAB1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT,XS(A)::QAR2(C),XR(a)
        • K(b);S_FLIGHT::S(D)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(b);P-FLIGHT::QAB1(C)
      • K(b);S_FLIGHT::QAR1(C)
      • R(a);N_GUARD,SBLOCK,XS(A)::QAR1(C),XP(c)
      • R(a);SBLOCK::QAB1(C)
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