MESON Chess Problem Database

Problem Display
PID: 7683 (8/NN6/3Q4/3p4/n1k5/8/2K5/8 w - - 0 1)

Lewis, Robert Tony

The Problemist, 1992

8/NN6/3Q4/3p4/n1k5/8/2K5/8

#2

4 + 3

2838 Fun with Chess Miniatures 1996
5454 Near Snap 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qf4#
    • 1...Sb2
      • 2.Qc5#
    • 1...Sc3
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sb6
      • 2.Qc5#
    • 1...d4
      • 2.Sa5#
  • Tries
    • 1.Sb5?
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sb2
        • 2.Qc5#
      • 1...Sc3
        • 2.Qc5#
      • 1...Sb6
        • 2.Qc5#
      • 1...d4
        • 2.Sa3#
      • 1...Kxb5!
    • 1.Qa3?
      • threat
        • 2.Qxa4#
      • 1...d4
        • 2.Qb3#
      • 1...Sb2
        • 2.Qc5#
        • 2.Qc3#
      • 1...Sc3
        • 2.Qc5#
        • 2.Qxc3#
      • 1...Sc5
        • 2.Qxc5#
        • 2.Qc3#
      • 1...Sb6
        • 2.Qc5#
        • 2.Qc3#
      • 1...Kd4!
    • 1.Qe5?
      • 1...d4
        • 2.Qb5#
      • 1...Sb2
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sc5
        • 2.Qc3#
      • 1...Sb6
        • 2.Qc3#
      • 1...Kb4!
    • 1.Qc7+?
      • 1...Kd4
        • 2.Qf4#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Kb4!
    • 1.Qf8?
      • 1...Kd4
        • 2.Qf4#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sb2
        • 2.Qc5#
      • 1...Sc3
        • 2.Qc5#
      • 1...Sb6
        • 2.Qc5#
      • 1...d4!
    • 1.Qxd5+?
      • 1...Kb4
        • 2.Qb3#
      • 1...Kxd5!
    • 1.Qb6?
      • threat
        • 2.Sa5#
        • 2.Sd6#
      • 1...Sc5
        • 2.Qxc5#
      • 1...d4
        • 2.Qb3#
        • 2.Qb5#
      • 1...Sxb6!
  • Keys
    • 1.Qg3!
      • 1...Kb4
        • 2.Qb3#
      • 1...Kd4
        • 2.Qf4#
      • 1...d4
        • 2.Qb3#
      • 1...Sb2
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sc5
        • 2.Qc3#
      • 1...Sb6
        • 2.Qc3#

This anticipates 23057(1996)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 5
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,P_SPINP(c)::QAR2(B)
    • S(a);N_GUARD::QAR1(B)
    • S(a);N_GUARD::QAR1(B),XS(a)
    • P(c);::S(D)
  • Tries
    • Try
      • S(C);
      • Vars
        • S(a);N_GUARD::QAR1(B),XS(a)
        • S(a);N_GUARD::QAR1(B)
        • P(c);::S(C)
      • Refutation
        • K(b);S_FLIGHT,XS(C)
    • Try
      • Q(B);
      • Threat
        • QAR2(B),XS(a)
      • Vars
        • P(c);SBLOCK::QAB1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • P(c);OGATE,SBLOCK::QAB1(B)
        • S(a);N_GUARD::QAR1(B)
        • S(a);N_GUARD::QAR1(B),XS(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(B)
        • S(a);N_GUARD,P_SPINS(a)::QAR1(B),XS(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);P-FLIGHT::QAR2(B)
        • S(a);N_GUARD::QAR1(B),XS(a)
        • S(a);N_GUARD::QAR1(B)
      • Refutation
        • P(c);
    • Try
      • Q(B);CHECK,XP(c)
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD::QAR1(B),XS(a)
      • Refutation
        • S(a);XQ(B)
  • Actual
    • Q(B);
    • Vars
      • K(b);P-FLIGHT::QAR1(B)
      • K(b);P-FLIGHT::QAR2(B)
      • P(c);SBLOCK::QAB1(B)
      • S(a);N_GUARD::QAR1(B)
      • S(a);N_GUARD::QAR1(B),XS(a)
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