MESON Chess Problem Database

Problem Display
PID: 29793 (6N1/5n2/4Q3/4n1pk/8/6K1/8/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

6N1/5n2/4Q3/4n1pk/8/6K1/8/8

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Qxf7#
    • 1...Sf3
      • 2.Qxf7#
    • 1...Sc4
      • 2.Qxf7#
    • 1...Sg4
      • 2.Qxf7#
    • 1...Sc6
      • 2.Qxf7#
    • 1...Sg6
      • 2.Qg4#
    • 1...Sd7
      • 2.Qxf7#
    • 1...Sd6
      • 2.Qh6#
    • 1...Sh6
      • 2.Qxh6#
    • 1...Sd8
      • 2.Qh6#
    • 1...Sh8
      • 2.Qh6#
  • Tries
    • 1.Kh3?
      • 1...Sd3
        • 2.Qxf7#
      • 1...Sf3
        • 2.Qxf7#
      • 1...Sc4
        • 2.Qxf7#
      • 1...Sg4
        • 2.Qxf7#
      • 1...Sc6
        • 2.Qxf7#
      • 1...Sg6
        • 2.Qg4#
      • 1...Sd7
        • 2.Qxf7#
      • 1...Sd6
        • 2.Qh6#
      • 1...Sh6
        • 2.Qxh6#
      • 1...Sd8
        • 2.Qh6#
      • 1...Sh8
        • 2.Qh6#
      • 1...g4+!
    • 1.Se7?
      • threat
        • 2.Qh3#
      • 1...Sg6
        • 2.Qxg6#
      • 1...Sf3
        • 2.Qg6#
      • 1...Sg4
        • 2.Qg6#
      • 1...g4!
    • 1.Qxf7+?
      • 1...Sg6
        • 2.Qh7#
      • 1...Sxf7!
  • Keys
    • 1.Qf5!
      • 1...Sd3
        • 2.Qxf7#
      • 1...Sf3
        • 2.Qxf7#
      • 1...Sc4
        • 2.Qxf7#
      • 1...Sg4
        • 2.Qxf7#
      • 1...Sc6
        • 2.Qxf7#
      • 1...Sg6
        • 2.Qg4#
      • 1...Sd7
        • 2.Qxf7#
      • 1...Sd6
        • 2.Qh7#
      • 1...Sh6
        • 2.Sf6#
      • 1...Sd8
        • 2.Qh7#
      • 1...Sh8
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB(B),XS(d)
    • S(a);N_GUARD,SBLOCK::QAB1(B)
    • S(d);N_GUARD::QAR1(B)
    • S(d);N_GUARD::QAR1(B),XS(d)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • S(a);N_GUARD::QAB(B),XS(d)
        • S(a);N_GUARD,SBLOCK::QAB1(B)
        • S(d);N_GUARD::QAR1(B)
        • S(d);N_GUARD::QAR1(B),XS(d)
      • Refutation
        • P(b);CHECK
    • Try
      • S(C);
      • Threat
        • QAR2(B)
      • Vars
        • S(a);N_GUARD::QAB1(B),XS(a)
        • S(a);N_GUARD::QAB1(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);CHECK,XS(d)
      • Vars
        • S(a);P_SPINS(a)::QAR2(B)
      • Refutation
        • S(a);XQ(B)
  • Actual
    • Q(B);P_PINP(b)
    • Vars
      • S(a);N_GUARD::QAB(B),XS(d)
      • S(a);N_GUARD,SBLOCK::QAB1(B)
      • S(d);N_GUARD::QAR2(B)
      • S(d);SBLOCK::S(C)
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