MESON Chess Problem Database

Problem Display
PID: 256004 (4n3/1p3R2/4k1P1/1N3p2/K3bB2/bN6/3R2B1/4Q1nq w - - 0 1)

Ahues, Herbert Siegfried Oskar

Berliner Morgenpost, 1968

4n3/1p3R2/4k1P1/1N3p2/K3bB2/bN6/3R2B1/4Q1nq

#2

9 + 8

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Sc5#
    • 1...Bb2
      • 2.Sc5#
    • 1...Bc5
      • 2.Sxc5#
    • 1...Sd6
      • 2.Sc7#
    • 1...Sf6
      • 2.Sc7#
    • 1...Sc7
      • 2.Sxc7#
    • 1...Sg7
      • 2.Sc7#
  • Tries
    • 1.Bf1?
      • threat
        • 2.Bc4#
      • 1...Sd6
        • 2.Sc7#
      • 1...Sf6
        • 2.Sc7#
      • 1...Sc7
        • 2.Sxc7#
      • 1...Se2!
    • 1.Rd6+?
      • 1...Sxd6
        • 2.Sc7#
      • 1...Bxd6!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Qc8#
      • 1...Bxc1
        • 2.Sc5#
      • 1...Bc5
        • 2.Sxc5#
      • 1...Bc2
        • 2.Sd4#
      • 1...Bc6
        • 2.Sd4#
      • 1...Sd6
        • 2.Sc7#
      • 1...Sf6
        • 2.Sc7#
      • 1...Sc7
        • 2.Sxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(c);N_GUARD::S(D)
    • B(c);N_GUARD::S(D),XB(c)
    • S(h);N_GUARD::S(G)
    • S(h);N_GUARD::S(G),XS(h)
  • Tries
    • Try
      • B(C);
      • Threat
        • B(C)
      • Vars
        • S(h);N_GUARD::S(G)
        • S(h);N_GUARD::S(G),XS(h)
      • Refutation
        • S(a);N_SPINB(d)
    • Try
      • R(B);CHECK
      • Vars
        • S(h);XR(B)::S(G)
      • Refutation
        • B(c);XR(B)
  • Actual
    • Q(A);N_PINB(d)
    • Threat
      • QAB(A)
    • Vars
      • B(c);N_GUARD,XQ(A)::S(D)
      • B(c);N_GUARD::S(D),XB(c)
      • B(d);P_PINS(D)::S(G)
      • B(d);P_PINS(G)::S(D)
      • S(h);N_GUARD::S(G)
      • S(h);N_GUARD::S(G),XS(h)
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