MESON Chess Problem Database

Problem Display
PID: 23049 (8/7p/4Q3/6Nk/4pP2/4K3/8/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

8/7p/4Q3/6Nk/4pP2/4K3/8/8

#2

4 + 3

5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kh4
      • 2.Qh3#
  • Tries
    • 1.Kxe4?
      • 1...Kh4
        • 2.Qh3#
      • 1...h6!
    • 1.Sf3?
      • 1...h6
        • 2.Qf5#
      • 1...exf3!
    • 1.Qh6+?
      • 1...Kg4
        • 2.Qh3#
      • 1...Kxh6!
  • Keys
    • 1.Qf5!
      • 1...Kh4
        • 2.Qh3#
      • 1...Kh6
        • 2.Qxh7#
      • 1...h6
        • 2.Sf3#

This anticipates 172241(1996)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR1(D)
  • Tries
    • Try
      • K(A);P-FLIGHT,XP(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(D)
      • Refutation
        • P(c);
    • Try
      • S(C);
      • Vars
        • P(c);SBLOCK::QAR2(D)
      • Refutation
        • P(a);XS(C)
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(D)
      • Refutation
        • K(b);P-FLIGHT,XQ(D)
  • Actual
    • Q(D);
    • Vars
      • K(b);P-FLIGHT::QAR1(D)
      • K(b);P-FLIGHT::QAR1(D),XP(c)
      • P(c);SBLOCK::QAR(D)+S(C)
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