MESON Chess Problem Database

Problem Display
PID: 146076 (KnR4B/b2pPP2/2P3Np/3k1P2/R3Npn1/8/7q/8 w - - 0 1)

Savournin, Jacques

The Problemist, 2011

KnR4B/b2pPP2/2P3Np/3k1P2/R3Npn1/8/7q/8

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Sxf4#
    • 1...Qh1
      • 2.Sxf4#
    • 1...Qa2
      • 2.Sxf4#
    • 1...Qb2
      • 2.Sxf4#
    • 1...Qc2
      • 2.Sxf4#
    • 1...Qe2
      • 2.Sxf4#
    • 1...Qg2
      • 2.Sxf4#
    • 1...Qh3
      • 2.Sxf4#
    • 1...Qh4
      • 2.Sxf4#
    • 1...Qh5
      • 2.Sxf4#
    • 1...Bd4
      • 2.Rxd4#
  • Tries
    • 1.e8Q?
      • threat
        • 2.Se7#
      • 1...Sxc6
        • 2.Qxd7#
      • 1...Qh4
        • 2.Sxf4#
      • 1...Bd4
        • 2.Rxd4#
      • 1...Sf6
        • 2.Qe5#
      • 1...Bc5!
    • 1.f8Q?
      • threat
        • 2.Qf7#
        • 2.Qg8#
      • 1...Bd4
        • 2.Rxd4#
      • 1...Sf6
        • 2.Qf7#
      • 1...Se5!
  • Keys
    • 1.e8S!
      • threat
        • 2.Se7#
      • 1...Sxc6
        • 2.Sc7#
      • 1...Bd4
        • 2.Rxd4#
      • 1...Qh4
        • 2.Sxf4#
      • 1...Bc5
        • 2.Sc3#
      • 1...Sf6
        • 2.S8xf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • Q(a);N_GUARD::S(E),XP(b)
    • B(f);N_GUARD::R1(A),XB(f)
  • Tries
    • Try
      • P(F);
      • Threat
        • S(E)
      • Vars
        • S(h);N_GUARD,XP(D)::QAR2(F),XP(g)
        • Q(a);N_GUARD::S(E),XP(b)
        • B(f);N_GUARD::R1(A),XB(f)
        • S(c);N_GUARD::QAR1(F)
      • Refutation
        • B(f);
    • Try
      • P(G);
      • Threat
        • DUALS(2)
      • Vars
        • B(f);N_GUARD::R1(A),XB(f)
        • S(c);::QAB(G)
      • Refutation
        • S(c);
  • Actual
    • P(F);
    • Threat
      • S(E)
    • Vars
      • S(h);SBLOCK,XP(D)::S(F)
      • B(f);N_GUARD::R1(A),XB(f)
      • Q(a);N_GUARD::S(E),XP(b)
      • B(f);SBLOCK::S(B)
      • S(c);N_GUARD::S(F),XS(c)
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