MESON Chess Problem Database

Problem Display
PID: 157706 (3R1N2/2n4b/2nP1P1q/4kr2/7Q/3pNPP1/B2R4/2K5 w - - 0 1)

Guida, Marco

1st HM., L'Italia Scacchistica, 2004

3R1N2/2n4b/2nP1P1q/4kr2/7Q/3pNPP1/B2R4/2K5

#2

11 + 7

4901 Best Problems 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf6
      • 2.Qe4#
    • 1...Rg5
      • 2.Qf4#
    • 1...Sd4
      • 2.Sg4#
    • 1...Sd5
      • 2.Sc4#
  • Tries
    • 1.Qd4+?
      • 1...Sxd4
        • 2.Sg4#
      • 1...Kxd4!
  • Keys
    • 1.Rxd3!
      • threat
        • 2.Sd7#
      • 1...Qxe3+
        • 2.Rxe3#
      • 1...Qxf8
        • 2.Sg4#
      • 1...Qg7
        • 2.Sc4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sb8
        • 2.Qd4#
      • 1...Sd5
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(e);SBLOCK,XP(I)::QAR1(G)
    • R(c);N_GUARD,S_CUTQ(e)::QAB1(G)
    • S(d);SBLOCK::S(D)
    • S(f);SBLOCK::S(D)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • S(d);SBLOCK,XQ(G)::S(D)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT,XQ(G)
  • Actual
    • R(C);P_SPINS(D),XP(a)
    • Threat
      • S(K)
    • Vars
      • Q(e);CHECK,OGATE,XS(D)::R(C),XQ(e)
      • Q(e);N_PINS(D),XS(K)::S(D)
      • Q(e);N_PINS(D)::S(D)
      • S(d);N_GUARD::QAB1(G),XS(d)
      • S(d);N_GUARD::QAB1(G)
      • S(f);N_GUARD::R1(C),XS(f)
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