MESON Chess Problem Database

Problem Display
PID: 10864 (8/5N1p/1r1pNP1r/5k2/Q1B2p1p/1p2n2K/1B4n1/4R1R1 w - - 0 1)

Goldschmeding, Cornelis

1st Place, Match: Indonesia - Netherlands, 1969

8/5N1p/1r1pNP1r/5k2/Q1B2p1p/1p2n2K/1B4n1/4R1R1

#2

9 + 10

3751 FIDE Album (1968-1970) 1977
702 Phenix 1992
273 Mat Plus 1994
133 The Problemist Supplement 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Bd3#
    • 1...Sf1
      • 2.Bd3#
    • 1...Sc2
      • 2.Bd3#
    • 1...Sg4
      • 2.Bd3#
    • 1...Sd5
      • 2.Bd3#
  • Tries
    • 1.Sg7+?
      • 1...Ke4
        • 2.Sg5#
      • 1...Kg6!
    • 1.Sxd6+?
      • 1...Kg6
        • 2.Qe8#
      • 1...Rxd6!
    • 1.Sxh6+?
      • 1...Ke4
        • 2.Sg5#
      • 1...Kg6!
    • 1.Qd7?
      • threat
        • 2.Bd3#
      • 1...Ke4
        • 2.Seg5#
      • 1...Kg6
        • 2.Sxf4#
      • 1...Sxe1
        • 2.Sc5#
      • 1...Sxc4
        • 2.Sf8#
      • 1...Rb4!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Bd3#
      • 1...Ke4
        • 2.Sd4#
      • 1...Kg6
        • 2.Sxd6#
      • 1...Sxe1
        • 2.Sg7#
      • 1...Sxc4
        • 2.Sxh6#
      • 1...Rb4
        • 2.Sxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • S(c);::B(F)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(f);P_SPINS(c),S_FLIGHT::S(I)
      • Refutation
        • K(f);P_SPINS(a),S_FLIGHT
    • Try
      • S(I);CHECK,XP(h)
      • Vars
        • K(f);P_SPINS(a),S_FLIGHT::QAB(E)
      • Refutation
        • R(g);XS(I)
    • Try
      • S(I);CHECK,XR(i)
      • Vars
        • K(f);P_SPINS(c),S_FLIGHT::S(G)
      • Refutation
        • K(f);P_SPINS(a),S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • B(F)
      • Vars
        • K(f);P_SPINS(c),S_FLIGHT::S(G)
        • K(f);P_SPINS(a),S_FLIGHT::S(G),XP(d)
        • S(a);XR(A)::QAB(E)+S(G)
        • S(c);XB(F)::QAB(E)+S(G)
      • Refutation
        • R(g);
  • Actual
    • Q(E);
    • Threat
      • B(F)
    • Vars
      • K(f);P_SPINS(c),S_FLIGHT::QAR(E)+S(G)
      • K(f);P_SPINS(a),S_FLIGHT::QAB(E)+S(I),XP(h)
      • S(a);XR(A)::S(G)
      • S(c);XB(F)::S(I),XR(i)
      • R(g);N_GUARD::S(I),XP(h)
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