MESON Chess Problem Database

Problem Display
PID: 204620 (8/3K2p1/N1pb2N1/3k3r/3p4/3Q4/3n4/8 w - - 0 1)

Beck, Friedrich

Deutsche Schachzeitung, 1989

8/3K2p1/N1pb2N1/3k3r/3p4/3Q4/3n4/8

#2

4 + 7

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Sf4#
    • 1...Bc5
      • 2.Sc7#
    • 1...Be5
      • 2.Se7#
    • 1...Sc4
      • 2.Qf3#
    • 1...Se4
      • 2.Qb3#
  • Tries
    • 1.Qc2?
      • threat
        • 2.Qxc6#
      • 1...d3
        • 2.Qxd3#
      • 1...Bc5
        • 2.Sc7#
      • 1...Sc4
        • 2.Qg2#
      • 1...c5!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qe6#
      • 1...d3
        • 2.Qxd3#
      • 1...Re5
        • 2.Sf4#
      • 1...Be5
        • 2.Se7#
      • 1...Se4
        • 2.Qa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(d);SBLOCK,S_CUTB(f)::S(C)
    • B(f);N_GUARD,SBLOCK::S(B)
    • B(f);N_GUARD,SBLOCK::S(C)
    • S(a);N_GUARD,SBLOCK::QAB(A)
  • Tries
    • Try
      • Q(A);N_PINP(b)
      • Threat
        • QAB1(A),XP(e)
      • Vars
        • P(b);OGATEB::QAR2(A),XP(b)
        • B(f);N_GUARD::S(B)
        • S(a);OGATE,SBLOCK::QAB(A)
      • Refutation
        • P(e);
  • Actual
    • Q(A);N_PINP(b)
    • Threat
      • QAB1(A)
    • Vars
      • P(b);OGATEB::QAR2(A),XP(b)
      • R(d);S_CUTB(f)::S(C)
      • B(f);N_GUARD::S(C)
      • S(a);OGATE,SBLOCK::QAB(A)
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Developed and maintained by Brian Stephenson.
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