MESON Chess Problem Database

Problem Display
PID: 9990 (3N4/3p4/4pb2/1N1k1rn1/3P1P2/B7/b1Q3K1/8 w - - 0 1)

Goldschmeding, Cornelis

3rd Prize, Europe Echecs, 1961

3N4/3p4/4pb2/1N1k1rn1/3P1P2/B7/b1Q3K1/8

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd4
      • 2.Sc7#
    • 1...Se4
      • 2.Qxa2#
    • 1...d6
      • 2.Qc6#
  • Tries
    • 1.Sc6?
      • threat
        • 2.Sc7#
        • 2.Sb4#
      • 1...Bc4
        • 2.Sb4#
      • 1...e5
        • 2.Sc7#
      • 1...Be5
        • 2.Sb4#
        • 2.Se7#
      • 1...Be7
        • 2.Sc7#
        • 2.Sxe7#
      • 1...Bd8
        • 2.Sb4#
      • 1...dxc6!
    • 1.Qd3?
      • threat
        • 2.Sc3#
        • 2.Sc7#
      • 1...Be5
        • 2.Sc3#
        • 2.dxe5#
      • 1...Se4
        • 2.Sc7#
      • 1...Bxd8!
    • 1.Qa4?
      • threat
        • 2.Sc3#
      • 1...Bxd4
        • 2.Qxd4#
      • 1...Bc4
        • 2.Qa8#
      • 1...Se4
        • 2.Sc7#
      • 1...Ke4!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Qc5#
      • 1...Kxd4
        • 2.Qd2#
      • 1...Bxd4
        • 2.Qxa2#
      • 1...Bc4
        • 2.Qxc4#
      • 1...Se4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(f);SBLOCK,XP(D)::S(F)
    • S(d);SBLOCK::QAB(A),XB(a)
    • P(g);N_GUARD::QAB1(A)
  • Tries
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::S(G)
        • P(e);::S(F)
        • B(f);::S(G)
      • Refutation
        • P(g);XS(G)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(d);::S(F)
      • Refutation
        • B(f);XS(G)
    • Try
      • Q(A);
      • Threat
        • S(F)
      • Vars
        • B(f);OGATE,XP(D)::QAR1(A),XB(f)
        • B(a);SBLOCK::QAB(A)
        • S(d);SBLOCK::S(F)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(F);
    • Threat
      • QAR1(A)
    • Vars
      • K(b);OGATEB,P-FLIGHT,XP(D)::QAR2(A)
      • B(f);SBLOCK,XP(D)::QAB(A),XB(a)
      • B(a);N_GUARD::QAB1(A),XB(a)
      • S(d);N_GUARD::QAB1(A),XS(d)
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