MESON Chess Problem Database

Problem Display
PID: 149880 (2B5/r7/3p1N2/r1pnk1P1/1p2P2R/pN6/2Q4K/7n w - - 0 1)

Robert, Philippe

3rd Prize, The Problemist Supplement, 2013

2B5/r7/3p1N2/r1pnk1P1/1p2P2R/pN6/2Q4K/7n

#2

8 + 9

56 The Problemist 2015
23 Die Schwalbe 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.Sg4#
  • Tries
    • 1.Qd1?
      • threat
        • 2.Qxd5#
      • 1...Sxf6
        • 2.Qa1#
      • 1...Se3
        • 2.Qa1#
      • 1...Sf4
        • 2.Qa1#
      • 1...Sb6
        • 2.Qa1#
      • 1...Sc7
        • 2.Qa1#
      • 1...Se7
        • 2.Qa1#
      • 1...c4
        • 2.Qd4#
      • 1...Sc3!
    • 1.Qd2?
      • threat
        • 2.Qxd5#
      • 1...Sxf6
        • 2.Qf4#
      • 1...Sc3
        • 2.Qf4#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sb6
        • 2.Qf4#
      • 1...Sc7
        • 2.Qf4#
      • 1...Se7
        • 2.Qf4#
      • 1...c4
        • 2.Qd4#
      • 1...Se3!
    • 1.exd5?
      • threat
        • 2.Re4#
        • 2.Qe4#
        • 2.Qf5#
        • 2.Qe2#
      • 1...Rd7
        • 2.Qe4#
      • 1...Rh7
        • 2.Qe4#
        • 2.Qf5#
        • 2.Qe2#
      • 1...Sf2
        • 2.Qf5#
      • 1...Sg3!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qxd5#
      • 1...Sxf6
        • 2.Qe6#
      • 1...Sc3
        • 2.Qe6#
      • 1...Se3
        • 2.Qe6#
      • 1...Sf4
        • 2.Sg4#
      • 1...Sb6
        • 2.Qe6#
      • 1...Sc7
        • 2.Sd7#
      • 1...Se7
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(f);SBLOCK::S(G)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XS(f)
      • Vars
        • S(f);N_GUARD,XS(G)::QAB(A)
        • S(f);N_GUARD::QAB(A)
        • P(e);N_GUARD::QAB1(A)
      • Refutation
        • S(f);
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XS(f)
      • Vars
        • S(f);N_GUARD,XS(G)::QAB1(A)
        • S(f);N_GUARD::QAB1(A)
        • S(f);N_GUARD::QAB1(A),XS(f)
        • P(e);N_GUARD::QAB1(A)
      • Refutation
        • S(f);
    • Try
      • P(D);XS(f)
      • Threat
        • DUALS(4)
      • Vars
        • R(i);::QAR1(A)
        • S(a);::QAR1(A)
      • Refutation
        • S(a);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XS(f)
    • Vars
      • S(f);OGATE,XS(G)::QAR1(A)
      • S(f);OGATE::QAR1(A)
      • S(f);SBLOCK::S(G)
      • S(f);S_CUTR(i)::S(G)
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