MESON Chess Problem Database

Problem Display
PID: 249850 (2N4K/3b1p1B/r1p1p3/5P2/2p1k3/2Q1N3/3n3B/3q4 w - - 0 1)

Seilberger, Johann Joseph Petrus Adrianus

Zaldo Zapirain, Juan

Jerusalem Post, 1950

2N4K/3b1p1B/r1p1p3/5P2/2p1k3/2Q1N3/3n3B/3q4

#2

7 + 9

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3
      • 2.Sd6#
    • 1...Sf3
      • 2.f6#
  • Tries
    • 1.Sg4?
      • threat
        • 2.Sf6#
      • 1...Kd5
        • 2.Qe5#
      • 1...f6
        • 2.Sxf6#
      • 1...Qxg4!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Sf6#
      • 1...Kxd5
        • 2.Qe5#
      • 1...cxd5
        • 2.f6#
      • 1...exd5
        • 2.Sd6#
      • 1...f6
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(a);SBLOCK::S(F)
    • S(b);SBLOCK::B(E)+P(D)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • K(d);N_GUARD,S_FLIGHT::QAR1(B)
        • P(i);::S(C),XP(i)
      • Refutation
        • Q(a);XS(C)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • K(d);N_GUARD,S_FLIGHT,XS(C)::QAR1(B)
      • P(f);SBLOCK,XS(C)::B(E)+P(D)
      • P(g);SBLOCK,XS(C)::S(F)
      • P(i);::S(C),XP(i)
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