MESON Chess Problem Database

Problem Display
PID: 283160 (4R3/1N6/1Pk5/2P5/8/2K5/4N3/6Q1 w - - 0 1)

Echemendia, Luis

Szypulski, Andrzej

Zaragoza-65 JT (Problemas), 2025

4R3/1N6/1Pk5/2P5/8/2K5/4N3/6Q1

#2

7 + 1

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qh1#
      • 2.Qg2#
  • Tries
    • 1.Re7?
      • 1...Kd5
        • 2.Qh1#
        • 2.Qg2#
      • 1...Kb5!
    • 1.Qb1?
      • 1...Kd5
        • 2.Qe4#
        • 2.Qh1#
      • 1...Kd7
        • 2.Qb5#
      • 1...Kxb7!
    • 1.Qg4?
      • 1...Kd5
        • 2.Qf3#
        • 2.Qe6#
        • 2.Qd7#
        • 2.Qg2#
        • 2.Qe4#
      • 1...Kxb7
        • 2.Qc8#
      • 1...Kb5!
    • 1.Qg7?
      • 1...Kd5
        • 2.Qg2#
        • 2.Qd7#
      • 1...Kb5!
  • Keys
    • 1.Qa1!
      • 1...Kb5
        • 2.Sd4#
      • 1...Kd5
        • 2.Qh1#
      • 1...Kxb7
        • 2.Qa8#
      • 1...Kd7
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(G);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT,XS(F)
    • Try
      • Q(A);
      • Vars
        • K(a);N_GUARD,S_FLIGHT,XS(F)::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::S(B)
      • K(a);N_GUARD,S_FLIGHT::QAB(A)
      • K(a);OGATEB,S_FLIGHT,XS(F)::QAB1(A)
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