MESON Chess Problem Database

Problem Display
PID: 194909 (r2nQ1N1/p1PnpPP1/1p2k1N1/6P1/4B3/b6b/K2Rpr2/8 w - - 0 1)

Guidelli, Giorgio

3rd HM., L'Italia Scacchistica, 1918

r2nQ1N1/p1PnpPP1/1p2k1N1/6P1/4B3/b6b/K2Rpr2/8

#2

10 + 11

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf7
      • 2.Qxd7#
    • 1...Bc1
      • 2.Qxe7#
    • 1...Bb2
      • 2.Qxe7#
    • 1...Sc5
      • 2.Qxe7#
    • 1...Se5
      • 2.Sf8#
    • 1...Sf6
      • 2.f8S#
    • 1...Sb8
      • 2.cxd8S#
    • 1...Sf8
      • 2.gxf8S#
    • 1...Sxf7
      • 2.Qxd7#
  • Tries
    • 1.cxd8Q?
      • threat
        • 2.Qdxd7#
      • 1...Sc5
        • 2.Rd6#
        • 2.Qdxe7#
        • 2.Qd5#
        • 2.Qd6#
        • 2.Qexe7#
      • 1...Se5
        • 2.Sf8#
        • 2.Qd5#
      • 1...Sf6
        • 2.f8S#
      • 1...Sb8
        • 2.Qd5#
      • 1...Sf8
        • 2.Qd5#
        • 2.gxf8S#
      • 1...Rxd8!
    • 1.c8Q?
      • threat
        • 2.Qcxd7#
        • 2.Qc4#
      • 1...Rf5
        • 2.Qcxd7#
      • 1...Bc5
        • 2.Qcxd7#
      • 1...Sc6
        • 2.Qcxd7#
      • 1...b5
        • 2.Qcxd7#
      • 1...Rxc8!
  • Keys
    • 1.Sh6!
      • threat
        • 2.Qxd7#
      • 1...Bd6
        • 2.Bd5#
      • 1...Sc5
        • 2.Qxe7#
      • 1...Se5
        • 2.Sf8#
      • 1...Sf6
        • 2.f8S#
      • 1...Sb8
        • 2.cxd8S#
      • 1...Sf8
        • 2.gxf8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • R(b);SBLOCK,XP(G)::QAB1(I),XS(h)
    • B(c);N_GUARD::QAR1(I),XP(i)
    • S(h);S_CUTB(c)::QAR1(I),XP(i)
    • S(h);N_GUARD,SBLOCK::S(E)
    • S(h);N_GUARD,S_CUTR(b)::P=S
    • S(h);S_CUTR(j)::PXS(k)=S
    • S(h);OGATE::PXS(h)=S
    • S(k);SBLOCK,XP(G)::QAB1(I),XS(h)
  • Tries
    • Try
      • P(F);XS(k)
      • Threat
        • QAB1(F),XS(h)
      • Vars
        • S(h);N_GUARD,S_CUTR(b)::P=S
        • S(h);OGATE::QAB1(F)
      • Refutation
        • R(j);XQ(F)
    • Try
      • P(F);P_PINS(h)
      • Threat
        • DUALS(2)
      • Vars
        • R(b);::QAB1(F),XS(h)
        • B(c);::QAB1(F),XS(h)
        • S(k);::QAB1(F),XS(h)
        • P(e);::QAB1(F),XS(h)
      • Refutation
        • R(j);N_SPINS(h),XQ(F)
  • Actual
    • S(J);
    • Threat
      • QAB1(I),XS(h)
    • Vars
      • B(c);SBLOCK::B(C)
      • S(h);S_CUTB(c)::QAR1(I),XP(i)
      • S(h);N_GUARD,SBLOCK::S(E)
      • S(h);N_GUARD,S_CUTR(b)::P=S
      • S(h);S_CUTR(j)::PXS(k)=S
      • S(h);OGATE::PXS(h)=S
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