MESON Chess Problem Database

Problem Display
PID: 46531 (3BK3/P1pP4/3pkN2/7p/7N/3PnpQ1/8/3b1r2 w - - 0 1)

Pilchenko, Viacheslav Karlovich

Shavirin, Valery Mikhailovich

Tidskrift for Schack, 1999

3BK3/P1pP4/3pkN2/7p/7N/3PnpQ1/8/3b1r2

#2

8 + 8

4393 Uralski Problemist 2002
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...f2
      • 2.Qxe3#
  • Tries
    • 1.Qf4?
      • threat
        • 2.Qxe3#
        • 2.Qe4#
      • 1...Re1
        • 2.Qe4#
      • 1...Sc2
        • 2.Qe4#
        • 2.Qf5#
      • 1...Sg2
        • 2.Qe4#
        • 2.Qf5#
      • 1...Sc4
        • 2.Qf5#
      • 1...Sg4
        • 2.Qf5#
      • 1...Sd5
        • 2.Qe4#
        • 2.Qf5#
      • 1...Sf5
        • 2.Qe4#
        • 2.Qxf5#
      • 1...d5!
    • 1.d4?
      • threat
        • 2.Qg8#
      • 1...Sg4
        • 2.d5#
      • 1...d5
        • 2.Qe5#
      • 1...Rg1!
    • 1.a8Q?
      • threat
        • 2.Qe4#
      • 1...Sc4
        • 2.Qd5#
      • 1...Sg4
        • 2.Qd5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...d5
        • 2.Qc6#
      • 1...c6!
    • 1.a8S?
      • threat
        • 2.Sxc7#
      • 1...c5
        • 2.Sc7#
      • 1...c6
        • 2.Sc7#
      • 1...Sd5!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qe4#
      • 1...Ke5
        • 2.Qe4#
      • 1...d5
        • 2.Sg4#
      • 1...Sc4
        • 2.Qf5#
      • 1...Sg4
        • 2.Qf5#
      • 1...Sf5
        • 2.Qxf5#

Anticipated by 46522(1988)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • P(d);OGATE::QAR(B),XS(c)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);::QAR2(B)
        • S(c);N_GUARD::QAB1(B)
      • Refutation
        • P(f);
    • Try
      • P(A);
      • Threat
        • QAB(B)
      • Vars
        • S(c);N_GUARD::P(A)
        • P(f);N_GUARD::QAR1(B)
      • Refutation
        • R(b);
    • Try
      • P(E);
      • Threat
        • QAR2(E)
      • Vars
        • S(c);N_GUARD::QAB1(E)
        • S(c);N_GUARD::QAB1(E),XS(c)
        • P(f);OGATEB::QAR2(E)
      • Refutation
        • P(h);
    • Try
      • P(E);
      • Threat
        • S(E),XP(h)
      • Vars
        • P(h);::S(E)
      • Refutation
        • S(c);
  • Actual
    • Q(B);
    • Threat
      • QAR2(B)
    • Vars
      • K(g);P-FLIGHT::QAR1(B)
      • P(f);SBLOCK::QAR(B)+S(D)
      • S(c);N_GUARD::QAB1(B)
      • S(c);N_GUARD::QAB1(B),XS(c)
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