MESON Chess Problem Database

Problem Display
PID: 234792 (8/8/8/8/5P2/4KPNk/5Q1b/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2017

8/8/8/8/5P2/4KPNk/5Q1b/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kh4
      • 2.Qxh2#
  • Tries
    • 1.Se4?
      • threat
        • 2.Sg5#
      • 1...Bg3
        • 2.Qxg3#
      • 1...Bxf4+!
    • 1.Sh5?
      • 1...Bxf4+
        • 2.Sxf4#
      • 1...Bg3
        • 2.Qxg3#
      • 1...Bg1!
    • 1.Qg2+?
      • 1...Kh4
        • 2.Qxh2#
      • 1...Kxg2!
  • Keys
    • 1.Se2!
      • 1...Bxf4+
        • 2.Sxf4#
      • 1...Bg3
        • 2.Qxg3#
      • 1...Bg1
        • 2.Sxg1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(b);P-FLIGHT::QAR2(A),XB(a)
  • Tries
    • Try
      • S(D);
      • Threat
        • S(D)
      • Vars
        • B(a);N_GUARD::QAR1(A),XB(a)
      • Refutation
        • B(a);CHECK,XP(E)
    • Try
      • S(D);
      • Vars
        • B(a);CHECK,XP(E)::S(D),XB(a)
        • B(a);N_GUARD::QAR1(A),XB(a)
      • Refutation
        • B(a);P_PINQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(A),XB(a)
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
  • Actual
    • S(D);
    • Vars
      • B(a);CHECK,XP(E)::S(D),XB(a)
      • B(a);N_GUARD::QAR1(A),XB(a)
      • B(a);N_GUARD,P_PINQ(A)::S(D),XB(a)
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