MESON Chess Problem Database

Problem Display
PID: 282733 (7B/8/3p4/7Q/K3k3/3N1r1p/R1P3n1/3N3B w - - 0 1)

Junker, Karl

Zurcher Woche, 1956

7B/8/3p4/7Q/K3k3/3N1r1p/R1P3n1/3N3B

#2

8 + 5

15601 Albrecht-Leiss-Degener Collection 2025

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.S1f2#
      • 2.Sc3#
    • 1...Se3
      • 2.S1f2#
      • 2.Sc3#
      • 2.Bxf3#
      • 2.Qxf3#
    • 1...Sf4
      • 2.S3f2#
      • 2.Bxf3#
    • 1...d5
      • 2.Qe5#
  • Tries
    • 1.S3f2+?
      • 1...Kf4
        • 2.Qg4#
      • 1...Rxf2!
    • 1.Sc5+?
      • 1...dxc5
        • 2.Qe5#
      • 1...Kf4!
  • Keys
    • 1.c4!
      • threat
        • 2.Qd5#
      • 1...Kxd3
        • 2.Qd5#
      • 1...Rxd3
        • 2.Qg4#
      • 1...Rf5
        • 2.Qe2#
      • 1...Se3
        • 2.S1f2#
      • 1...Sf4
        • 2.S3f2#
      • 1...d5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(e);N_GUARD::QAR1(G)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(d);N_GUARD,P-FLIGHT::QAR1(G)
      • Refutation
        • R(b);P_SPINS(a),XS(E)
    • Try
      • S(E);CHECK
      • Vars
        • P(e);XS(E)::QAR1(G)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • P(D);
    • Threat
      • QAB1(G)
    • Vars
      • K(d);S_FLIGHT,XS(E)::QAR2(G)
      • R(b);N_GUARD,P_SPINS(a),SBLOCK,XS(E)::QAR2(G)
      • R(b);OGATE,P_SPINS(a),SBLOCK::QAR2(G)
      • S(a);P_SPINR(b),SBLOCK::S(A)
      • S(a);P_SPINR(b),SBLOCK::S(E)
      • P(e);::QAB1(G),XP(e)
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