MESON Chess Problem Database

Problem Display
PID: 183497 (k1N5/1p1K4/2R5/8/p7/3Q4/8/8 w - - 0 1)

Lincoln, Robert A

Problem Observer, 2016

k1N5/1p1K4/2R5/8/p7/3Q4/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Ra6+?
      • 1...Kb8
        • 2.Qg3#
        • 2.Qd6#
      • 1...bxa6!
    • 1.Qa6+?
      • 1...Kb8
        • 2.Qa7#
      • 1...bxa6!
    • 1.Qe3?
      • threat
        • 2.Qa7#
      • 1...Kb8
        • 2.Qa7#
      • 1...b6!
    • 1.Qd4?
      • threat
        • 2.Qa7#
      • 1...Kb8
        • 2.Qa7#
      • 1...b6!
  • Keys
    • 1.Kc7!
      • 1...bxc6
        • 2.Qa6#
      • 1...a3
        • 2.Qxa3#
      • 1...b5
        • 2.Ra6#
      • 1...b6
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);CHECK
      • Refutation
        • P(b);XR(B)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(A)
      • Refutation
        • P(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(c);P-FLIGHT::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(c);P-FLIGHT::QAB1(A)
      • Refutation
        • P(b);
  • Actual
    • K(C);P-FLIGHT
    • Vars
      • P(b);N_GUARD,XR(B)::QAR2(A)
      • P(a);OGATEB::QAR(A),XP(a)
      • P(b);N_GUARD::R(B)
      • P(b);N_GUARD::QAR2(A)
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Developed and maintained by Brian Stephenson.
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