MESON Chess Problem Database

Problem Display
PID: 47528 (3n1r1b/2p1N1R1/KN4nq/2Q1P2p/4pk2/4p3/4B2P/6R1 w - - 0 1)

Robert, Philippe

1st Prize, Pat a Mat, 2000

3n1r1b/2p1N1R1/KN4nq/2Q1P2p/4pk2/4p3/4B2P/6R1

#2

9 + 10

23 Die Schwalbe 2003
56 The Problemist 2003
6166 FIDE Album (1998-2000) 2007
23 Die Schwalbe 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Qg5
      • 2.Rf1#
    • 1...Sxe7
      • 2.Rf1#
    • 1...h4
      • 2.Rg4#
  • Tries
    • 1.Qxc7?
      • threat
        • 2.Sbd5#
      • 1...Sxe5
        • 2.Rf1#
      • 1...Sxe7
        • 2.Rf1#
      • 1...Sh4
        • 2.e6#
      • 1...Rf6!
  • Keys
    • 1.e6!
      • threat
        • 2.Rf1#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Sh4
        • 2.Qxc7#
      • 1...Se5
        • 2.Sbd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(f);SBLOCK::R(A)
    • S(e);P_PINS(G),XS(H)::R(A)
    • P(d);N_GUARD::R1(A)
  • Tries
    • Try
      • Q(D);XP(g)
      • Threat
        • S(G)
      • Vars
        • S(e);P_PINS(G),P_SPINS(e),XP(E)::R(A)
        • S(e);P_PINS(G),XS(H)::R(A)
        • S(e);N_GUARD,P_PINS(G)::QAB(D)+P(E)
      • Refutation
        • R(i);P_PINS(G)
  • Actual
    • P(E);
    • Threat
      • R(A)
    • Vars
      • R(i);N_GUARD::QAR1(D),XR(i)
      • S(e);N_GUARD::QAB(D),XP(g)
      • S(e);SBLOCK::S(G)
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