MESON Chess Problem Database

Problem Display
PID: 214797 (5B2/8/1K6/p7/k2p4/1n4n1/P3bN2/4Q3 w - - 0 1)

Koerper, Rudolph

St. Louis Globe Democrat, 1877

5B2/8/1K6/p7/k2p4/1n4n1/P3bN2/4Q3

#2

5 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Qe8#
    • 1...Sa1
      • 2.Qxa5#
    • 1...Sc1
      • 2.Qxa5#
    • 1...Sc5
      • 2.Qxa5#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Sb2#
      • 1...Sc5
        • 2.Qxa5#
      • 1...Bxd3!
    • 1.Qc3?
      • threat
        • 2.Qxb3#
        • 2.axb3#
      • 1...Bd1
        • 2.Qc4#
        • 2.Qc6#
      • 1...Bc4
        • 2.Qxc4#
      • 1...Sa1
        • 2.Qxa5#
        • 2.Qa3#
      • 1...Sc1
        • 2.Qxa5#
        • 2.Qa3#
      • 1...Sd2
        • 2.Qxa5#
        • 2.Qa3#
      • 1...Sc5
        • 2.Qxa5#
      • 1...dxc3!
  • Keys
    • 1.Sd1!
      • threat
        • 2.Sb2#
      • 1...Bxd1
        • 2.Qe8#
      • 1...Sc5
        • 2.Qxa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • B(a);OGATE::QAB(A)
    • S(b);N_GUARD::QAR1(A),XP(f)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • S(b);N_GUARD::QAR1(A),XP(f)
      • Refutation
        • B(a);XS(C)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);N_GUARD::QAR2(A),XB(a)
        • S(b);N_GUARD::QAR1(A),XP(f)
      • Refutation
        • P(e);XQ(A)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • B(a);OGATE,XS(C)::QAB(A)
      • S(b);N_GUARD::QAR1(A),XP(f)
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