MESON Chess Problem Database

Problem Display
PID: 200788 (5K1B/8/4ppQ1/4r3/2p2kN1/2P1N3/1R3pBP/2qn4 w - - 0 1)

Lubton, Yehuda

The Problemist, 1983

5K1B/8/4ppQ1/4r3/2p2kN1/2P1N3/1R3pBP/2qn4

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Qxf6#
      • 2.Qh6#
    • 1...Rg5
      • 2.Qe4#
    • 1...Sxc3
      • 2.Rxf2#
    • 1...Sxe3
      • 2.Rxf2#
    • 1...f5
      • 2.Bxe5#
      • 2.Qh6#
  • Tries
    • 1.Sxf6?
      • threat
        • 2.Qg3#
      • 1...Kxe3
        • 2.Qg3#
      • 1...Qxe3
        • 2.Qg4#
      • 1...Rxe3
        • 2.Sh5#
      • 1...Sxe3
        • 2.Rxf2#
      • 1...Rg5
        • 2.Qe4#
      • 1...f1S!
    • 1.Sh6?
      • threat
        • 2.Qg3#
      • 1...Kxe3
        • 2.Qg3#
      • 1...Qxe3
        • 2.Qg4#
      • 1...Rxe3
        • 2.Qxf6#
      • 1...Rg5
        • 2.Qe4#
      • 1...f1S!
  • Keys
    • 1.Sxf2!
      • threat
        • 2.Qg3#
      • 1...Kxe3
        • 2.Qg3#
      • 1...Qxe3
        • 2.Qg4#
      • 1...Rxe3
        • 2.Qxf6#
      • 1...Sxe3
        • 2.Sh3#
      • 1...Rg5
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(f);N_GUARD,SBLOCK::QAR1(G)
    • S(b);N_GUARD,XP(D)::R(A),XP(c)
    • S(b);N_GUARD,XS(E)::R(A),XP(c)
  • Tries
    • Try
      • S(F);XP(h)
      • Threat
        • QAB1(G)
      • Vars
        • K(e);S_FLIGHT,XS(E)::QAR2(G)
        • Q(a);SBLOCK,XS(E)::QAR1(G)
        • R(f);N_GUARD,SBLOCK,XS(E)::S(F)
        • S(b);N_GUARD,SBLOCK,XS(E)::R(A),XP(c)
        • R(f);N_GUARD,SBLOCK::QAR1(G)
      • Refutation
        • P(c);
    • Try
      • S(F);
      • Threat
        • QAB1(G)
      • Vars
        • K(e);S_FLIGHT,XS(E)::QAR2(G)
        • Q(a);SBLOCK,XS(E)::QAR1(G)
        • R(f);N_GUARD,SBLOCK,XS(E)::QAR2(G),XP(h)
        • R(f);N_GUARD,SBLOCK::QAR1(G)
      • Refutation
        • P(c);
  • Actual
    • S(F);XP(c)
    • Threat
      • QAB1(G)
    • Vars
      • K(e);S_FLIGHT,XS(E)::QAR2(G)
      • Q(a);SBLOCK,XS(E)::QAR1(G)
      • R(f);N_GUARD,SBLOCK,XS(E)::QAR2(G),XP(h)
      • S(b);SBLOCK,XS(E)::S(F)
      • R(f);N_GUARD,SBLOCK::QAR1(G)
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