MESON Chess Problem Database

Problem Display
PID: 164932 (1Q4N1/1p6/2n2p2/4p2n/4kPPp/KB4br/2N1Pp1p/2B5 w - - 0 1)

Sardella, Giuseppe

Comm., Best Problems, 2016

1Q4N1/1p6/2n2p2/4p2n/4kPPp/KB4br/2N1Pp1p/2B5

#2

9 + 11

4901 Best Problems 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf4
      • 2.Sxf6#
    • 1...Sg7
      • 2.Sxf6#
  • Tries
    • 1.Qxb7?
      • threat
        • 2.Qxc6#
      • 1...Sxf4
        • 2.Sxf6#
      • 1...exf4!
    • 1.Qc8?
      • threat
        • 2.Qf5#
      • 1...Sg7
        • 2.Sxf6#
      • 1...Se7
        • 2.Qc4#
      • 1...f5
        • 2.Qxf5#
      • 1...Sd4!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Bd5#
        • 2.Qd3#
        • 2.Qd5#
      • 1...Bxf4
        • 2.Qd5#
      • 1...Sxf4
        • 2.Sxf6#
      • 1...exf4
        • 2.Bd5#
        • 2.Qd5#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Sd4
        • 2.Bd5#
        • 2.Qd5#
      • 1...Se7
        • 2.Qb4#
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(h);N_GUARD,XP(F)::S(I),XP(j)
    • S(h);N_GUARD::S(I),XP(j)
  • Tries
    • Try
      • Q(H);P_PINS(i),XP(k)
      • Threat
        • QAB(H),XS(i)
      • Vars
        • S(h);N_GUARD,XP(F)::S(I),XP(j)
      • Refutation
        • P(g);XP(F)
    • Try
      • Q(H);
      • Threat
        • QAB1(H)
      • Vars
        • S(h);N_GUARD::S(I),XP(j)
        • S(i);OGATE::QAR2(H)
        • P(j);::QAB1(H),XP(j)
      • Refutation
        • S(i);
  • Actual
    • Q(H);
    • Threat
      • DUALS(3)
    • Vars
      • B(c);P_PINB(E),XP(F)::QAB1(H)
      • S(h);N_GUARD,XP(F)::S(I),XP(j)
      • S(i);N_GUARD::QAR(H),XS(i)
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