MESON Chess Problem Database

Problem Display
PID: 22066 (8/K2QpqN1/8/R7/R1b1rk1P/2N5/3n1PB1/4r3 w - - 0 1)

Rietveld, Johannes Jacob

1st Prize, Centurini MT, 1924

8/K2QpqN1/8/R7/R1b1rk1P/2N5/3n1PB1/4r3

#2

9 + 7

3098 FIDE Album (1914-1944) (I) 1971
56 The Problemist 2005

SOLUTION

  • SOUND
  • Sets
    • 1...Qh5
      • 2.Sxh5#
    • 1...Qe8
      • 2.Qf5#
    • 1...Qg8
      • 2.Sh5#
      • 2.Qf5#
    • 1...Qf5
      • 2.Qxf5#
    • 1...Qf6
      • 2.Sh5#
    • 1...Qxg7
      • 2.Qf5#
    • 1...Qf8
      • 2.Sh5#
  • Tries
    • 1.Rf5+?
      • 1...Qxf5
        • 2.Qxf5#
      • 1...Kg4!
  • Keys
    • 1.Rg5!
      • threat
        • 2.Qg4#
      • 1...Qf5
        • 2.Qxf5#
      • 1...Qh5
        • 2.Sxh5#
        • 2.Qf5#
      • 1...Qe6
        • 2.Sh5#
      • 1...Re6
        • 2.Sd5#
      • 1...Be2
        • 2.Qxd2#
      • 1...Be6
        • 2.Qc7#
      • 1...e5
        • 2.Rg4#
      • 1...e6
        • 2.Qxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • Q(g);N_GUARD::S(I),XQ(g)
    • Q(g);N_GUARD::QAR1(H)
    • Q(g);N_GUARD::QAR1(H),XQ(g)
    • Q(g);N_GUARD::S(I)
    • Q(g);N_GUARD,XS(I)::QAR1(H)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • Q(g);OGATE,XR(F)::QAR1(H),XQ(g)
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • R(F);
    • Threat
      • QAR1(H)
    • Vars
      • Q(g);N_GUARD::QAR1(H),XQ(g)
      • Q(g);N_GUARD::S(I)
      • R(d);P_SPINB(c),S_CUTQ(g)::S(C)
      • B(c);P_SPINR(d),S_CUTR(a)::QAB(H),XS(b)
      • B(c);P_SPINR(d),S_CUTP(f)::QAB(H)
      • P(f);P_PINQ(H),SBLOCK::R1(F)
      • P(f);OGATE,P_PINQ(H)::QAR(H),XQ(g)
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