MESON Chess Problem Database

Problem Display
PID: 23061 (8/8/5K2/3N4/4kN2/2Q5/1nn5/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

8/8/5K2/3N4/4kN2/2Q5/1nn5/8

#2

4 + 3

5454 Near Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sa4
      • 2.Qd3#
    • 1...Sc4
      • 2.Qd3#
    • 1...Sa1
      • 2.Qe3#
    • 1...Se1
      • 2.Qe3#
    • 1...Sa3
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
    • 1...Sb4
      • 2.Qe3#
    • 1...Sd4
      • 2.Qe3#
  • Tries
    • 1.Kg5?
      • threat
        • 2.Sf6#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sd4
        • 2.Qe3#
      • 1...Sd3!
    • 1.Ke6?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sd1
        • 2.Qd3#
      • 1...Sa4
        • 2.Qd3#
      • 1...Sc4
        • 2.Qd3#
      • 1...Sa1
        • 2.Qe3#
      • 1...Se1
        • 2.Qe3#
      • 1...Sa3
        • 2.Qe3#
      • 1...Sb4
        • 2.Qe3#
      • 1...Sd4+!
    • 1.Qxc2+?
      • 1...Kf3
        • 2.Qg2#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Kd4!
    • 1.Qb3?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sd1
        • 2.Qd3#
      • 1...Sa4
        • 2.Qd3#
      • 1...Sc4
        • 2.Qd3#
      • 1...Sa1
        • 2.Qe3#
      • 1...Se1
        • 2.Qe3#
      • 1...Sa3
        • 2.Qe3#
      • 1...Sb4
        • 2.Qe3#
      • 1...Sd4
        • 2.Qe3#
      • 1...Kd4!
    • 1.Qg3?
      • 1...Sd1
        • 2.Qd3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sa4
        • 2.Qd3#
      • 1...Sc4
        • 2.Qd3#
      • 1...Sa1
        • 2.Qe3#
      • 1...Se1
        • 2.Qe3#
      • 1...Sa3
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sb4
        • 2.Qe3#
      • 1...Sd4
        • 2.Sc3#
        • 2.Qe3#
      • 1...Kd4!
    • 1.Qh3?
      • 1...Sd1
        • 2.Qd3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sa4
        • 2.Qd3#
      • 1...Sc4
        • 2.Qd3#
      • 1...Sa1
        • 2.Qe3#
      • 1...Se1
        • 2.Qe3#
      • 1...Sa3
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sb4
        • 2.Qe3#
      • 1...Sd4
        • 2.Qe3#
      • 1...Kd4!
  • Keys
    • 1.Qd2!
      • 1...Kf3
        • 2.Qg2#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sd1
        • 2.Qd3#
      • 1...Sa4
        • 2.Qd3#
      • 1...Sc4
        • 2.Qd3#
      • 1...Sa1
        • 2.Qe3#
      • 1...Se1
        • 2.Qe3#
      • 1...Sa3
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sb4
        • 2.Qe3#
      • 1...Sd4
        • 2.Qe3#

Anticipated by 99639(1931)

FEATURES

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