MESON Chess Problem Database

Problem Display
PID: 10694 (3R3K/2ppQ3/7p/p3Np1r/2PkPp2/1R1q4/1nPP4/6b1 w - - 0 1)

Goldschmeding, Cornelis

1st Place, 2. International Team (Friendship) Match, 1967-1970

3R3K/2ppQ3/7p/p3Np1r/2PkPp2/1R1q4/1nPP4/6b1

#2

9 + 11

3751 FIDE Album (1968-1970) 1977
273 Mat Plus 1994
4640 Chess Wizardry: The New ABC of Chess Problems 1996
133 The Problemist Supplement 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc4
      • 2.Sf3#
    • 1...Qxe4
      • 2.c3#
    • 1...Sxc4
      • 2.Sc6#
    • 1...fxe4
      • 2.Rxd7#
  • Tries
    • 1.Rxd3+?
      • 1...Kxe4
        • 2.Sf3#
        • 2.Sg4#
        • 2.Sc6#
        • 2.Sg6#
        • 2.Sxd7#
        • 2.Sf7#
      • 1...Sxd3!
    • 1.Qxd7+?
      • 1...Kc5
        • 2.Rb5#
        • 2.Qb5#
        • 2.Qc6#
        • 2.Qxc7#
      • 1...Kxe5
        • 2.Qe7#
      • 1...Kxe4!
  • Keys
    • 1.Sxd7!
      • threat
        • 2.Sb6#
      • 1...Kxc4
        • 2.Se5#
      • 1...Qxc4
        • 2.Qe5#
      • 1...Qxe4
        • 2.Qc5#
      • 1...Sxc4
        • 2.Rxd3#
      • 1...fxe4
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(c);N_GUARD,SBLOCK,XP(D)::S(F)
    • Q(c);N_GUARD,SBLOCK,XP(E)::P(A)
    • S(b);SBLOCK,XP(D)::S(F)
    • P(g);SBLOCK,XP(E)::R(H),XP(k)
  • Tries
    • Try
      • R(C);CHECK,XQ(c)
      • Refutation
        • S(b);XR(C)
    • Try
      • Q(G);CHECK,XP(k)
      • Vars
        • K(d);S_FLIGHT,XS(F)::QAR2(G)
      • Refutation
        • K(d);P-FLIGHT,XP(E)
  • Actual
    • S(F);XP(k)
    • Threat
      • R(H)+S(F)
    • Vars
      • K(d);P-FLIGHT,XP(D)::S(F)
      • Q(c);SBLOCK,XP(D)::QAB1(G)
      • Q(c);SBLOCK,XP(E)::QAB1(G)
      • S(b);N_GUARD,SBLOCK,XP(D)::R1(C),XQ(c)
      • P(g);SBLOCK,XP(E)::R(H)+S(F)
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