MESON Chess Problem Database

Problem Display
PID: 7507 (8/8/8/1N1k1P2/6K1/2Q5/3P4/8 w - - 0 1)

Lewis, Robert Tony

The Problemist, 1990

8/8/8/1N1k1P2/6K1/2Q5/3P4/8

#2

5 + 1

2838 Fun with Chess Miniatures 1996
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qd4#
  • Tries
    • 1.Sc7+?
      • 1...Ke4
        • 2.Qe3#
      • 1...Kd6!
    • 1.Qb4?
      • 1...Ke5
        • 2.Qd4#
      • 1...Kc6!
    • 1.Qc4+?
      • 1...Ke5
        • 2.Qe6#
        • 2.Qd4#
      • 1...Kxc4!
    • 1.Qc5+?
      • 1...Ke4
        • 2.Qd4#
      • 1...Kxc5!
    • 1.Qc6+?
      • 1...Ke5
        • 2.Qe6#
        • 2.d4#
      • 1...Kxc6!
    • 1.Qc8?
      • 1...Ke5
        • 2.Qe6#
      • 1...Ke4!
    • 1.f6?
      • 1...Ke4
        • 2.Qd4#
      • 1...Ke6!
  • Keys
    • 1.d4!
      • 1...Ke4
        • 2.Qf3#

Anticipated by 212386(1986)

This anticipates 171424(1998)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR1(B)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(E);
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • P(A);
    • Vars
      • K(a);S_FLIGHT::QAB1(B)
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