MESON Chess Problem Database

Problem Display
PID: 24233 (5K2/4NN2/4k3/1n6/3n4/8/8/2Q5 w - - 0 1)

Neyndorff, Luke

StrateGems, 1998

5K2/4NN2/4k3/1n6/3n4/8/8/2Q5

#2

4 + 3

2786 More Fun with Chess Miniatures 2000
5454 Near Snap 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Qh6#
    • 1...Kd7
      • 2.Qc8#
  • Tries
    • 1.Qe3+?
      • 1...Kf6
        • 2.Qh6#
        • 2.Qe5#
      • 1...Kd7!
    • 1.Qf4?
      • 1...Sf5
        • 2.Qxf5#
      • 1...Sc2
        • 2.Qf5#
      • 1...Se2
        • 2.Qf5#
      • 1...Sb3
        • 2.Qf5#
      • 1...Sf3
        • 2.Qf5#
      • 1...Sc6
        • 2.Qf5#
      • 1...Sa3
        • 2.Qd6#
      • 1...Sc3
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sa7
        • 2.Qd6#
      • 1...Sc7
        • 2.Qd6#
      • 1...Kd7!
    • 1.Qc4+?
      • 1...Kd7
        • 2.Qc8#
      • 1...Kf6!
    • 1.Qc6+?
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sxc6!
  • Keys
    • 1.Qc5!
      • 1...Kf6
        • 2.Qe5#
      • 1...Kd7
        • 2.Qc8#
      • 1...Sc2
        • 2.Qf5#
      • 1...Se2
        • 2.Qf5#
      • 1...Sb3
        • 2.Qf5#
      • 1...Sf3
        • 2.Qf5#
      • 1...Sf5
        • 2.Qxf5#
      • 1...Sc6
        • 2.Qf5#
      • 1...Sa3
        • 2.Qd6#
      • 1...Sc3
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sa7
        • 2.Qd6#
      • 1...Sc7
        • 2.Qd6#

Anticipated by 77659(1989)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT::QAR2(A)
    • K(c);S_FLIGHT::QAB1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • S(a);N_GUARD::QAB1(A),XS(a)
        • S(a);N_GUARD::QAB1(A)
        • S(b);N_GUARD::QAR1(A)
        • S(b);N_GUARD::QAR1(A),XS(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR1(A),XS(b)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(c);P-FLIGHT::QAB1(A)
      • K(c);S_FLIGHT::QAB1(A)
      • S(a);N_GUARD::QAB1(A)
      • S(a);N_GUARD::QAB1(A),XS(a)
      • S(b);N_GUARD::QAR1(A)
      • S(b);N_GUARD::QAR1(A),XS(b)
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