MESON Chess Problem Database

Problem Display
PID: 47560 (4k2r/7n/3pP3/3N3n/3Q4/1K6/8/8 w k - 0 1)

Paboucek, Frantisek

Bulletin Ouvrier des Echecs, 1947

4k2r/7n/3pP3/3N3n/3Q4/1K6/8/8

#2

4 + 5

4872 Themes-64 1956
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf8
      • 2.Qxh8#
    • 1...Sg5
      • 2.Qxh8#
    • 1...0-0
      • 2.Se7#
  • Tries
    • 1.Qc3?
      • threat
        • 2.Qc8#
      • 1...Kf8
        • 2.Qxh8#
      • 1...0-0
        • 2.Se7#
      • 1...Kd8!
    • 1.Qa7?
      • threat
        • 2.Qb8#
        • 2.Qe7#
        • 2.Qa8#
      • 1...Kd8
        • 2.Qb8#
        • 2.Qd7#
        • 2.Qa8#
      • 1...Kf8
        • 2.Qf7#
      • 1...0-0!
    • 1.Qg7?
      • threat
        • 2.Qe7#
      • 1...Kd8
        • 2.Qd7#
      • 1...Sxg7!
    • 1.Qa4+?
      • 1...Kd8
        • 2.Qd7#
        • 2.Qa8#
      • 1...Kf8!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qa8#
      • 1...Kd8
        • 2.Qa8#
      • 1...Kf8
        • 2.Qxh8#
      • 1...0-0
        • 2.Se7#

This anticipates 15659(1986)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(d);P-FLIGHT::QAR2(B),XR(e)
    • S(c);N_GUARD::QAR(B),XR(e)
    • K(d);0-0::S(C)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • K(d);P-FLIGHT::QAR2(B),XR(e)
        • K(d);0-0::S(C)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • K(d);P-FLIGHT::QAR1(B)
      • Refutation
        • K(d);0-0
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • K(d);P-FLIGHT::QAR1(B)
      • Refutation
        • S(a);XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAR(B)
    • Vars
      • K(d);P-FLIGHT::QAR(B)
      • K(d);P-FLIGHT::QAR2(B),XR(e)
      • K(d);0-0::S(C)
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