MESON Chess Problem Database

Problem Display
PID: 237285 (4nN2/K2P2r1/2k2bbR/1N2pp2/PP6/8/3Q4/8 w - - 0 1)

Goldschmeding, Cornelis

Schweizerische Arbeiter Schachzeitung, 1947

4nN2/K2P2r1/2k2bbR/1N2pp2/PP6/8/3Q4/8

#2

8 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd7+
      • 2.Qxd7#
    • 1...Be7
      • 2.dxe8Q#
      • 2.dxe8B#
    • 1...Bf7
      • 2.d8S#
    • 1...Sd6
      • 2.Qxd6#
    • 1...Sc7
      • 2.Qd6#
  • Tries
    • 1.Sxg6?
      • threat
        • 2.Sxe5#
      • 1...Rxg6
        • 2.dxe8Q#
        • 2.dxe8B#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Re7
        • 2.Sxe7#
      • 1...e4
        • 2.Se5#
      • 1...Rxd7+!
    • 1.Qd4?
      • threat
        • 2.Qc5#
        • 2.Qc4#
      • 1...Rxd7+
        • 2.Qxd7#
      • 1...Be7
        • 2.dxe8Q#
        • 2.dxe8B#
      • 1...Bf7
        • 2.Qc5#
        • 2.d8S#
      • 1...Sd6
        • 2.Qc5#
        • 2.Qxd6#
      • 1...exd4!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qc4#
      • 1...Rxd7+
        • 2.Qxd7#
      • 1...Be7
        • 2.dxe8Q#
        • 2.dxe8B#
      • 1...Bf7
        • 2.d8S#
      • 1...Sd6
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • R(f);CHECK,OGATE,XP(G)::QAB1(A),XR(f)
    • B(d);N_PINP(G),P_SPINB(e)::PXS(g)=Q
    • B(e);N_PINP(G),P_SPINB(d)::P=S
    • S(g);N_GUARD::QAR1(A),XS(g)
    • S(g);N_GUARD,N_PINP(G)::QAR1(A)
  • Tries
    • Try
      • S(H);XB(e)
      • Threat
        • S(H),XP(a)
      • Vars
        • R(f);N_PINP(G),XS(H)::PXS(g)=Q
        • S(g);N_GUARD::QAR1(A),XS(g)
        • R(f);N_GUARD::S(H),XR(f)
        • P(a);::S(H)
      • Refutation
        • R(f);CHECK,XP(G)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(f);CHECK,OGATE,XP(G)::QAB1(A),XR(f)
        • B(d);N_PINP(G),P_SPINB(e)::PXS(g)=Q
      • Refutation
        • P(a);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • R(f);CHECK,OGATE,XP(G)::QAB1(A),XR(f)
      • B(d);N_PINP(G),P_SPINB(e)::PXS(g)=Q
      • B(e);N_PINP(G),P_SPINB(d)::P=S
      • S(g);N_GUARD::QAR1(A),XS(g)
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