MESON Chess Problem Database

Problem Display
PID: 287421 (8/K7/8/1PB5/p1kP4/p6Q/P4N2/3R4 w - - 0 1)

Mealor, David

Problem Paradise, 2019

8/K7/8/1PB5/p1kP4/p6Q/P4N2/3R4

#2

8 + 3

15601 Albrecht-Leiss-Degener Collection 2026

SOLUTION

  • SOUND
  • Tries
    • 1.Rc1+?
      • 1...Kd5
        • 2.Qf5#
        • 2.Qd7#
      • 1...Kxb5!
    • 1.Re1?
      • 1...Kd5
        • 2.Qe6#
      • 1...Kxb5!
    • 1.Qe6+?
      • 1...Kxb5
        • 2.Qa6#
      • 1...Kc3!
    • 1.Qg3?
      • 1...Kd5
        • 2.Qg8#
      • 1...Kxb5!
    • 1.Qh6?
      • 1...Kc3
        • 2.Qc1#
      • 1...Kxb5
        • 2.Qa6#
      • 1...Kd5!
  • Keys
    • 1.Qc8!
      • 1...Kc3
        • 2.Bxa3#
      • 1...Kxb5
        • 2.Qa6#
      • 1...Kd5
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);CHECK
      • Refutation
        • K(c);S_FLIGHT,XP(F)
    • Try
      • R(A);
      • Vars
        • K(c);N_GUARD,S_FLIGHT::QAB1(D)
      • Refutation
        • K(c);S_FLIGHT,XP(F)
    • Try
      • Q(D);CHECK
      • Vars
        • K(c);OGATEB,S_FLIGHT,XP(F)::QAB1(D)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(D);
      • Vars
        • K(c);N_GUARD,S_FLIGHT::QAB(D)
      • Refutation
        • K(c);S_FLIGHT,XP(F)
    • Try
      • Q(D);
      • Vars
        • K(c);N_GUARD,P-FLIGHT::QAR2(D)
        • K(c);OGATEB,S_FLIGHT,XP(F)::QAB1(D)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(D);
    • Vars
      • K(c);N_GUARD,P-FLIGHT::QAR(D)+B(G),XP(a)
      • K(c);OGATEB,S_FLIGHT,XP(F)::QAB1(D)
      • K(c);N_GUARD,S_FLIGHT::QAB(D)
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