MESON Chess Problem Database

Problem Display
PID: 16232 (8/8/8/pp6/kB6/8/1K6/n3Q3 w - - 0 1)

Zimmer, Eligiusz

StrateGems, 2000

8/8/8/pp6/kB6/8/1K6/n3Q3

#2

3 + 4

3713 Snap 2026

SOLUTION

  • SOUND
  • Sets
    • 1...axb4
      • 2.Qxa1#
  • Tries
    • 1.Bxa5?
      • threat
        • 2.Qb4#
        • 2.Qxa1#
      • 1...b4
        • 2.Qxb4#
      • 1...Sb3
        • 2.Qb4#
      • 1...Sc2!
    • 1.Qc3?
      • threat
        • 2.Qa3#
      • 1...Sc2
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#
      • 1...axb4!
    • 1.Qd1+?
      • 1...Kxb4
        • 2.Qd4#
      • 1...Sb3
        • 2.Qxb3#
      • 1...Sc2!
    • 1.Qe6?
      • 1...axb4
        • 2.Qa2#
        • 2.Qa6#
      • 1...Sc2
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#
      • 1...Kxb4!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Qa3#
      • 1...Kxb4
        • 2.Qd4#
      • 1...axb4
        • 2.Qa7#
      • 1...Sc2
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#

This anticipates 283980(2025)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK,XB(C)::QAR(A),XS(a)
  • Tries
    • Try
      • B(C);XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • P(d);::QAR1(A),XP(d)
        • S(a);::QAR1(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(a);N_GUARD::QAB1(A)
        • S(a);N_GUARD::QAB1(A),XS(a)
      • Refutation
        • P(c);XB(C)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATEB,P-FLIGHT,XB(C)::QAR2(A)
        • S(a);N_GUARD,P_SPINS(a)::QAB1(A),XS(a)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(A);
      • Vars
        • S(a);N_GUARD::QAB1(A)
        • S(a);N_GUARD::QAB1(A),XS(a)
      • Refutation
        • K(b);P-FLIGHT,XB(C)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(b);OGATEB,P-FLIGHT,XB(C)::QAR2(A)
      • P(c);OGATEB,SBLOCK,XB(C)::QAR(A)
      • S(a);N_GUARD::QAB1(A)
      • S(a);N_GUARD::QAB1(A),XS(a)
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