MESON Chess Problem Database

Problem Display
PID: 141192 (4RnKb/4NN1n/2p2k2/2P1pP2/5p2/5P2/5P2/6Q1 w - - 0 1)

Nielsen, Karl Christian

L'Echiquier, 1926

4RnKb/4NN1n/2p2k2/2P1pP2/5p2/5P2/5P2/6Q1

#2

9 + 7

14868 Pirnie Collection 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Bg7
      • 2.Qxg7#
    • 1...Sg5
      • 2.Qxg5#
    • 1...Se6
      • 2.Qg6#
    • 1...Sg6
      • 2.Qxg6#
    • 1...Sd7
      • 2.Qg6#
    • 1...e4
      • 2.Qa1#
  • Tries
    • 1.Sd5+?
      • 1...Kxf5
        • 2.Sd6#
        • 2.Sh6#
        • 2.Qg4#
      • 1...cxd5!
    • 1.Sh6?
      • 1...Bg7
        • 2.Qxg7#
      • 1...Sg5
        • 2.Sg4#
      • 1...Se6
        • 2.Qg6#
      • 1...Sg6
        • 2.Qxg6#
      • 1...Sd7
        • 2.Qg6#
      • 1...e4!
    • 1.Sxh8?
      • threat
        • 2.Qg7#
      • 1...Se6
        • 2.Qg6#
      • 1...Sg6
        • 2.Qxg6#
      • 1...Sg5!
    • 1.Qg2?
      • 1...Bg7
        • 2.Qxg7#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Se6
        • 2.Qg6#
      • 1...Sg6
        • 2.Qxg6#
      • 1...Sd7
        • 2.Qg6#
      • 1...e4!
    • 1.Qg4?
      • 1...Bg7
        • 2.Qxg7#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Se6
        • 2.Qg6#
      • 1...Sg6
        • 2.Qxg6#
      • 1...Sd7
        • 2.Qg6#
      • 1...e4!
  • Keys
    • 1.Sxe5!
      • 1...Kxe5
        • 2.Qa1#
      • 1...Bg7
        • 2.Qxg7#
      • 1...Sg5
        • 2.Sg4#
      • 1...Se6
        • 2.Sd7#
      • 1...Sg6
        • 2.Sd7#
      • 1...Sd7
        • 2.Sxd7#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • B(g);N_GUARD::QAB1(A),XB(g)
    • S(e);N_GUARD::QAB1(A),XS(e)
    • S(f);N_GUARD::QAR1(A)
    • S(f);N_GUARD::QAR1(A),XS(f)
    • P(b);OGATEB::QAB(A)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • P(c);XS(F)
    • Try
      • S(G);
      • Vars
        • B(g);N_GUARD::QAB1(A),XB(g)
        • S(e);SBLOCK::S(G)
        • S(f);N_GUARD::QAR1(A)
        • S(f);N_GUARD::QAR1(A),XS(f)
      • Refutation
        • P(b);
    • Try
      • S(G);XB(g)
      • Threat
        • QAB1(A)
      • Vars
        • S(f);N_GUARD::QAR1(A)
        • S(f);N_GUARD::QAR1(A),XS(f)
      • Refutation
        • S(e);
    • Try
      • Q(A);
      • Vars
        • B(g);N_GUARD::QAB1(A),XB(g)
        • S(e);N_GUARD::QAB1(A),XS(e)
        • S(f);N_GUARD::QAR1(A)
        • S(f);N_GUARD::QAR1(A),XS(f)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • B(g);N_GUARD::QAB1(A),XB(g)
        • S(e);N_GUARD::QAB1(A),XS(e)
        • S(f);N_GUARD::QAR1(A)
        • S(f);N_GUARD::QAR1(A),XS(f)
      • Refutation
        • P(b);
  • Actual
    • S(G);XP(b)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(G)::QAB(A)
      • B(g);N_GUARD::QAB1(A),XB(g)
      • S(e);SBLOCK::S(G)
      • S(f);N_GUARD::S(G)
      • S(f);N_GUARD::S(G),XS(f)
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