MESON Chess Problem Database

Problem Display
PID: 264443 (8/5p2/N4Q2/1k6/4P3/2B5/1K6/8 w - - 0 1)

Lewis, Robert Tony

The Problemist, 1992

8/5p2/N4Q2/1k6/4P3/2B5/1K6/8

#2

5 + 2

3713 Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.Qc6#
    • 1...Kc4
      • 2.Qf1#
  • Tries
    • 1.Ka2?
      • 1...Ka4
        • 2.Qc6#
      • 1...Kc4!
    • 1.Kc2?
      • 1...Kc4
        • 2.Qf1#
        • 2.Qc6#
      • 1...Ka4!
    • 1.Sc7+?
      • 1...Ka4
        • 2.Qd4#
        • 2.Qa6#
        • 2.Qc6#
      • 1...Kc4
        • 2.Qd4#
      • 1...Kc5!
    • 1.Sb8?
      • threat
        • 2.Qc6#
      • 1...Ka4
        • 2.Qa6#
        • 2.Qc6#
      • 1...Kc5
        • 2.Qc6#
      • 1...Kc4!
    • 1.Be1?
      • 1...Ka4
        • 2.Qc6#
      • 1...Kc4!
    • 1.Bd2?
      • 1...Ka4
        • 2.Qc6#
      • 1...Kc4!
    • 1.Bb4?
      • 1...Ka4
        • 2.Qc6#
      • 1...Kc4!
    • 1.e5?
      • 1...Ka4
        • 2.Qc6#
      • 1...Kc4!
  • Keys
    • 1.Sb4!
      • 1...Ka4
        • 2.Qa6#
      • 1...Kc4
        • 2.Qc6#
      • 1...Ka5
        • 2.Qa6#
      • 1...Kc5
        • 2.Qc6#

Anticipated by 219864(1979)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);N_GUARD,S_FLIGHT::QAB(E)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(A);P-FLIGHT
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(D);
      • Threat
        • QAB1(E)
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(B);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(B);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(B);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(C);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB(E)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(D);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAR2(E)
      • K(a);N_GUARD,P-FLIGHT::QAR1(E)
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