MESON Chess Problem Database

Problem Display
PID: 17859 (QnBn4/1rp4K/bPkP4/1p1NRN2/1P6/1p6/3R4/8 w - - 0 1)

Fleck, Ferenc

3rd Prize, Norsk Sjakkblad, 1951

QnBn4/1rp4K/bPkP4/1p1NRN2/1P6/1p6/3R4/8

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...b2
      • 2.Rc2#
    • 1...cxb6+
      • 2.Sde7#
    • 1...cxd6+
      • 2.Sfe7#
  • Tries
    • 1.Re7?
      • threat
        • 2.Rxc7#
      • 1...cxb6
        • 2.Rc7#
      • 1...cxd6
        • 2.Rc7#
      • 1...Sd7
        • 2.Bxd7#
      • 1...Se6!
    • 1.bxc7?
      • 1...Sd7
        • 2.cxd8S#
      • 1...Sf7
        • 2.cxb8S#
      • 1...b2
        • 2.Rc2#
      • 1...Se6!
  • Keys
    • 1.dxc7!
      • 1...Sd7
        • 2.cxd8S#
      • 1...Se6
        • 2.Rxe6#
      • 1...Sf7
        • 2.cxb8S#
      • 1...b2
        • 2.Rc2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • P(a);N_GUARD::R(A)
    • P(f);CHECK,SBLOCK,XP(F)::S(C)
    • P(f);CHECK,SBLOCK,XP(G)::S(E)
  • Tries
    • Try
      • R(D);
      • Threat
        • R1(D),XP(f)
      • Vars
        • P(f);P_PINR(D),XP(F)::R1(D)
        • P(f);P_PINR(D),XP(G)::R1(D)
        • S(g);N_GUARD::B(J),XS(g)
      • Refutation
        • S(h);
    • Try
      • P(F);P_SPINP(F),XP(f)
      • Vars
        • S(g);N_PINP(F)::PXS(h)=S
        • S(h);N_PINP(F)::PXS(g)=S
        • P(a);N_GUARD::R(A)
      • Refutation
        • S(h);
  • Actual
    • P(G);P_SPINP(G),XP(f)
    • Vars
      • S(g);N_PINP(G)::PXS(h)=S
      • S(h);N_GUARD::R(D),XS(h)
      • S(h);N_PINP(G)::PXS(g)=S
      • P(a);N_GUARD::R(A)
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