MESON Chess Problem Database

Problem Display
PID: 145381 (4B3/8/8/5kpQ/2N1p3/4K3/8/8 w - - 0 1)

Lewis, Robert Tony

The Problemist, 1979

4B3/8/8/5kpQ/2N1p3/4K3/8/8

#2

4 + 3

133 The Problemist Supplement 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qf7#
    • 1...Kf6
      • 2.Qf7#
  • Tries
    • 1.Qf3+?
      • 1...Ke6
        • 2.Qf7#
      • 1...exf3!
    • 1.Qxg5+?
      • 1...Ke6
        • 2.Qe5#
      • 1...Kxg5!
    • 1.Qh7+?
      • 1...Ke6
        • 2.Qf7#
      • 1...Kf6
        • 2.Qf7#
      • 1...Kg4!
    • 1.Qh8?
      • 1...Ke6
        • 2.Qe5#
      • 1...g4
        • 2.Qe5#
      • 1...Kg4!
  • Keys
    • 1.Qh2!
      • 1...Kg4
        • 2.Bd7#
      • 1...Ke6
        • 2.Qe5#
      • 1...Kf6
        • 2.Qe5#
      • 1...g4
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINP(c),S_FLIGHT::QAB1(C)
    • K(b);N_SPINP(c),P-FLIGHT::QAR1(C)
  • Tries
    • Try
      • Q(C);CHECK,N_PINP(c)
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(C)
      • Refutation
        • P(a);XQ(C)
    • Try
      • Q(C);CHECK,XP(c)
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(C)
      • Refutation
        • K(b);P-FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK,N_PINP(c)
      • Vars
        • K(b);S_FLIGHT::QAB1(C)
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);N_PINP(c)
      • Vars
        • K(b);S_FLIGHT::QAR1(C)
        • P(c);SBLOCK::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(C);N_PINP(c)
    • Vars
      • K(b);S_FLIGHT::B(D)
      • K(b);S_FLIGHT::QAR1(C)
      • K(b);P-FLIGHT::QAB1(C)
      • P(c);SBLOCK::QAR1(C)
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