MESON Chess Problem Database

Problem Display
PID: 99959 (8/Bp6/bP1N4/kPN5/8/2Pp4/nKpP4/Q1n5 w - - 0 1)

Kovacs, Ferenc

Magyar Sakkvilag, 1924

8/Bp6/bP1N4/kPN5/8/2Pp4/nKpP4/Q1n5

#2

9 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxb5
      • 2.Sdxb7#
    • 1...Se2
      • 2.Qxa2#
    • 1...Sb3
      • 2.Qxa2#
  • Tries
    • 1.Sb3+?
      • 1...Sxb3
        • 2.Qxa2#
      • 1...Ka4!
    • 1.bxa6?
      • 1...Se2
        • 2.Qxa2#
      • 1...Sb3
        • 2.Qxa2#
      • 1...bxa6!
  • Keys
    • 1.Ka3!
      • 1...Bxb5
        • 2.Sdxb7#
      • 1...Sxc3
        • 2.Qxc3#
      • 1...Se2
        • 2.Sb3#
      • 1...Sb3
        • 2.Sxb3#
      • 1...Sb4
        • 2.cxb4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(f);N_GUARD,SBLOCK,XP(E)::S(H),XP(g)
    • S(a);N_GUARD::QAR(A),XS(b)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • S(a);XS(F)::QAR(A),XS(b)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • P(E);XB(f)
      • Vars
        • S(a);N_GUARD::QAR(A),XS(b)
      • Refutation
        • P(g);XP(E)
  • Actual
    • K(B);N_PINS(b),S_FLIGHT
    • Vars
      • B(f);N_GUARD,SBLOCK,XP(E)::S(H),XP(g)
      • S(b);OGATE,XP(D)::QAB(A),XS(b)
      • S(a);N_GUARD::S(F)
      • S(a);N_GUARD::S(F),XS(a)
      • S(b);OGATE::P(D),XS(b)
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