MESON Chess Problem Database

Problem Display
PID: 23060 (4Nn2/7p/8/5K1k/8/7n/8/4Q3 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

4Nn2/7p/8/5K1k/8/7n/8/4Q3

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kh6
      • 2.Qh4#
    • 1...h6
      • 2.Sf6#
      • 2.Sg7#
  • Tries
    • 1.Qg3?
      • threat
        • 2.Qxh3#
      • 1...Kh6
        • 2.Qh4#
        • 2.Qxh3#
      • 1...Sg1
        • 2.Qg5#
      • 1...Sf2
        • 2.Qg5#
      • 1...Sf4
        • 2.Qg5#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Sg6!
    • 1.Qd1+?
      • 1...Kh4
        • 2.Qg4#
      • 1...Kh6!
    • 1.Qe2+?
      • 1...Kh4
        • 2.Qg4#
      • 1...Kh6!
  • Keys
    • 1.Qe7!
      • 1...Kh6
        • 2.Qh4#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Sg1
        • 2.Qg5#
      • 1...Sf2
        • 2.Qg5#
      • 1...Sf4
        • 2.Qg5#
      • 1...Se6
        • 2.Qxh7#
      • 1...Sg6
        • 2.Qxh7#
      • 1...Sd7
        • 2.Qxh7#
      • 1...h6
        • 2.Sg7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR2(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR2(A),XS(a)
      • Vars
        • S(a);N_GUARD::QAR1(A)
        • S(a);N_GUARD::QAR1(A),XS(a)
      • Refutation
        • S(d);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);P-FLIGHT::QAR2(A)
      • S(a);N_GUARD::QAR1(A),XS(a)
      • S(a);N_GUARD::QAR1(A)
      • S(d);N_GUARD::QAR2(A),XP(c)
      • P(c);SBLOCK::S(C)
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