MESON Chess Problem Database

Problem Display
PID: 137623 (KB2n1b1/1R1pr3/1pkn4/p2r4/PP1P4/3NNR1Q/8/7B w - - 0 1)

Gandy, Jean-Claude

diagrammes, 1974

KB2n1b1/1R1pr3/1pkn4/p2r4/PP1P4/3NNR1Q/8/7B

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe3
      • 2.Qxd7#
    • 1...Re4
      • 2.Qxd7#
    • 1...Re5
      • 2.Qxd7#
    • 1...Sf6
      • 2.Rc7#
    • 1...Sc7+
      • 2.Rxc7#
    • 1...Sg7
      • 2.Rc7#
    • 1...axb4
      • 2.Sxb4#
  • Tries
    • 1.Se5+?
      • 1...Rexe5
        • 2.Qxd7#
      • 1...Rdxe5!
  • Keys
    • 1.Rf6!
      • threat
        • 2.b5#
      • 1...Sc7+
        • 2.Rxc7#
      • 1...Sxf6
        • 2.Rc7#
      • 1...axb4
        • 2.Sxb4#
      • 1...Re4
        • 2.Qxd7#
      • 1...Re6
        • 2.Bxd5#
      • 1...Be6
        • 2.Se5#
      • 1...b5
        • 2.axb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(g);N_GUARD,XS(C)::QAB1(E),XP(f)
    • R(g);N_GUARD::QAB1(E),XP(f)
    • S(h);N_GUARD::R1(I)
    • S(h);CHECK,N_GUARD::R1(I),XS(h)
    • P(a);XP(G)::S(B),XP(a)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • R(g);XS(B)::QAB1(E),XP(f)
      • Refutation
        • R(b);XS(B)
  • Actual
    • R(D);P_PINR(b),P_PINS(e)
    • Threat
      • P(G)
    • Vars
      • S(h);CHECK,N_GUARD::R1(I),XS(h)
      • S(h);N_GUARD,N_SPINS(e),XR(D)::R1(I)
      • P(a);XP(G)::S(B),XP(a)
      • R(g);N_GUARD,N_SPINR(b)::QAB1(E),XP(f)
      • R(g);N_SPINS(e),S_CUTB(i)::B(A),XR(b)
      • B(i);N_SPINS(e),S_CUTR(g)::S(B)
      • P(c);OGATE::P(F),XP(c)
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