MESON Chess Problem Database

Problem Display
PID: 110818 (8/4R1p1/4P1R1/p3nkNK/r2Q2p1/5PPp/2Nbq3/8 w - - 0 1)

Piatesi, Antonio

Hlas l'udu, 1983

8/4R1p1/4P1R1/p3nkNK/r2Q2p1/5PPp/2Nbq3/8

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.fxe4#
    • 1...Rxd4
      • 2.Sxd4#
    • 1...Bb4
      • 2.Qf4#
    • 1...Sd3
      • 2.Rf7#
    • 1...Sxf3
      • 2.Rf7#
    • 1...Sc4
      • 2.Rf7#
    • 1...Sc6
      • 2.Rf7#
    • 1...Sxg6
      • 2.Rf7#
    • 1...Sf7
      • 2.Rxf7#
  • Tries
    • 1.Se4?
      • threat
        • 2.Sd6#
      • 1...Qxe4
        • 2.fxe4#
      • 1...Rxd4
        • 2.Sxd4#
      • 1...Bb4
        • 2.Rg5#
      • 1...Sc4
        • 2.Rf7#
      • 1...Sf7
        • 2.Rxf7#
      • 1...Qa6!
    • 1.Rf6+?
      • 1...Kxf6
        • 2.Rf7#
      • 1...gxf6!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Sd6#
      • 1...Rxd4
        • 2.Sxd4#
      • 1...Sxf7
        • 2.Rxf7#
      • 1...Qa6
        • 2.Qxe5#
      • 1...Bb4
        • 2.Qf4#
      • 1...Sc4
        • 2.Qxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • Q(b);OGATE::P(B),XQ(b)
    • R(d);XQ(D)::S(A),XR(d)
    • B(a);N_GUARD,S_CUTR(d)::QAR1(D)
    • S(g);N_GUARD::R(I)
    • S(g);N_GUARD,XP(B)::R(I)
    • S(g);N_GUARD,XR(H)::R(I)
    • S(g);N_GUARD::R(I),XS(g)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • Q(b);OGATE,XS(E)::P(B),XQ(b)
        • R(d);XQ(D)::S(A),XR(d)
        • B(a);N_GUARD::R1(H)
        • S(g);N_GUARD::R(I)
        • S(g);N_GUARD::R(I),XS(g)
      • Refutation
        • Q(b);
    • Try
      • R(H);CHECK
      • Vars
        • K(h);P-FLIGHT,P_SPINS(g),XR(H)::R1(I)
      • Refutation
        • P(i);XR(H)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • R(d);XQ(D)::S(A),XR(d)
      • S(g);OGATE,XS(E)::R(I),XS(g)
      • Q(b);N_GUARD::QAR1(D),XS(g)
      • B(a);N_GUARD,S_CUTR(d)::QAR1(D)
      • S(g);N_GUARD,S_CUTR(d)::QAB1(D),XP(e)
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