MESON Chess Problem Database

Problem Display
PID: 252913 (4bR1Q/3R3B/K3N1qn/2p1N1p1/4k3/4p1r1/1nr1P3/8 w - - 0 1)

Piatesi, Antonio

Schach-Aktiv, 1986

4bR1Q/3R3B/K3N1qn/2p1N1p1/4k3/4p1r1/1nr1P3/8

#2

8 + 10

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3
      • 2.exf3#
    • 1...Sd3
      • 2.exd3#
    • 1...Sf7
      • 2.Bxg6#
    • 1...c4
      • 2.Rd4#
    • 1...g4
      • 2.Rf4#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Qe5#
      • 1...Sxd3
        • 2.exd3#
      • 1...Sf7
        • 2.Bxg6#
      • 1...Sc4
        • 2.Sxc5#
      • 1...Sg4!
    • 1.Sf3?
      • threat
        • 2.Qe5#
      • 1...Rxf3
        • 2.exf3#
      • 1...Sf7
        • 2.Bxg6#
      • 1...Sd3
        • 2.exd3#
      • 1...Sg4
        • 2.Sxg5#
      • 1...Sc4!
    • 1.Sxg6?
      • threat
        • 2.Qe5#
      • 1...Sf7
        • 2.Sgf4#
        • 2.Sh4#
        • 2.Se5#
        • 2.Se7#
      • 1...Sd3
        • 2.exd3#
      • 1...Sc4
        • 2.Sxc5#
      • 1...Sg4
        • 2.Sxg5#
      • 1...Bxg6!
    • 1.Bxg6+?
      • 1...Sf5
        • 2.Bxf5#
      • 1...Bxg6!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Qe5#
      • 1...Sf7
        • 2.Bxg6#
      • 1...Sd3
        • 2.exd3#
      • 1...Sc4
        • 2.Sxc5#
      • 1...Sg4
        • 2.Sxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(d);OGATE::P(A),XR(d)
    • S(a);OGATE::P(A),XS(a)
    • S(i);N_GUARD,S_CUTB(j)::B(F),XQ(h)
    • P(f);N_GUARD::R1(E)
    • P(g);N_GUARD::R1(G)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAR1(H)
      • Vars
        • S(a);OGATE,XS(B)::P(A),XS(a)
        • S(i);N_GUARD,S_CUTB(j)::B(F),XQ(h)
        • S(a);S_CUTR(b)::S(B),XP(f)
      • Refutation
        • S(i);
    • Try
      • S(B);
      • Threat
        • QAR1(H)
      • Vars
        • R(d);OGATE,XS(B)::P(A),XR(d)
        • S(i);N_GUARD,S_CUTB(j)::B(F),XQ(h)
        • S(a);OGATE::P(A),XS(a)
        • S(i);S_CUTR(d)::S(B),XP(g)
      • Refutation
        • S(a);
    • Try
      • S(B);N_SPINS(D),XQ(h)
      • Threat
        • QAR1(H)
      • Vars
        • S(a);OGATE::P(A),XS(a)
        • S(a);S_CUTR(b)::S(D),XP(f)
        • S(i);S_CUTR(d)::S(D),XP(g)
      • Refutation
        • B(j);P_SPINB(j),XS(B)
    • Try
      • B(F);CHECK,N_SPINS(D),XQ(h)
      • Vars
        • S(i);N_GUARD,P_SPINS(i)::B(F),XS(i)
      • Refutation
        • B(j);XB(F)
  • Actual
    • S(B);N_SPINS(D)
    • Threat
      • QAR1(H)
    • Vars
      • S(i);N_GUARD,S_CUTB(j)::B(F),XQ(h)
      • S(a);OGATE::P(A),XS(a)
      • S(a);S_CUTR(b)::S(D),XP(f)
      • S(i);S_CUTR(d)::S(D),XP(g)
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