MESON Chess Problem Database

Problem Display
PID: 157470 (8/4Q3/2K4p/1pp4P/4N1Bn/5qp1/1Rr1k1p1/2BbN1R1 w - - 0 1)

Hoek, Willem

van Gool, Johann Christoffel

Probleemblad, 1981

8/4Q3/2K4p/1pp4P/4N1Bn/5qp1/1Rr1k1p1/2BbN1R1

#2

9 + 10

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sf5
      • 2.Bxf3#
    • 1...Sg6
      • 2.Bxf3#
  • Tries
    • 1.Qxh4?
      • threat
        • 2.Bxf3#
      • 1...Qxg4
        • 2.Qxg4#
      • 1...Rd2!
    • 1.Qg5?
      • threat
        • 2.Qe3#
      • 1...Rd2
        • 2.Rxd2#
        • 2.Qxd2#
      • 1...Sf5
        • 2.Bxf3#
      • 1...hxg5!
  • Keys
    • 1.Qxc5!
      • 1...Qxg4
        • 2.Sc3#
      • 1...Rxb2
        • 2.Qe3#
      • 1...Rd2
        • 2.Rxd2#
      • 1...Sf5
        • 2.Bxf3#
      • 1...Sg6
        • 2.Bxf3#
      • 1...b4
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(g);N_GUARD::B(F),XQ(e)
  • Tries
    • Try
      • Q(I);XS(g)
      • Threat
        • B(F),XQ(e)
      • Vars
        • Q(e);N_PINS(E),N_SPINQ(e),OGATE,XB(F)::QAB(I),XQ(e)
      • Refutation
        • R(b);
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • S(g);N_GUARD::B(F),XQ(e)
      • Refutation
        • P(j);XQ(I)
  • Actual
    • Q(I);P_SPINQ(I),XP(i)
    • Vars
      • Q(e);N_PINS(E),N_SPINQ(e),XB(F)::S(E)
      • R(b);N_PINQ(I),N_SPINR(b),XR(D)::QAR1(I)
      • R(b);N_PINQ(I),OGATE::R1(D),XR(b)
      • S(g);N_GUARD::B(F),XQ(e)
      • P(h);N_GUARD::QAB(I)
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