MESON Chess Problem Database

Problem Display
PID: 79219 (1N6/1p6/8/kpQ5/8/8/K7/4b3 w - - 0 1)

von Alvensleben, Wichard Udo Reinhard

Deutsche Schachzeitung, 1986

1N6/1p6/8/kpQ5/8/8/K7/4b3

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.Qa3#
    • 1...Bb4
      • 2.Qa7#
    • 1...b6
      • 2.Qa3#
  • Tries
    • 1.Kb3?
      • threat
        • 2.Qa7#
      • 1...b6
        • 2.Qa3#
      • 1...Bf2!
    • 1.Sc6+?
      • 1...Ka4
        • 2.Qa3#
        • 2.Qc2#
      • 1...Ka6
        • 2.Qa7#
      • 1...bxc6!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Qa3#
      • 1...Ka4
        • 2.Qa3#
      • 1...Ka6
        • 2.Qb6#
      • 1...Bb4
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(b);N_SPINP(c),P-FLIGHT::QAR1(B)
    • B(a);SBLOCK::QAR2(B)
    • P(d);SBLOCK::QAR2(B)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • QAR2(B)
      • Vars
        • P(d);SBLOCK::QAR2(B)
      • Refutation
        • B(a);
    • Try
      • S(C);CHECK
      • Vars
        • K(b);N_SPINP(c),P-FLIGHT::QAR1(B)
      • Refutation
        • P(d);XS(C)
  • Actual
    • S(C);
    • Threat
      • QAR2(B)
    • Vars
      • K(b);N_SPINP(c),P-FLIGHT::QAR1(B)
      • B(a);SBLOCK::QAR2(B)
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