MESON Chess Problem Database

Problem Display
PID: 187718 (4Q3/bP3p2/1pNN4/1p1k1P2/1B6/4pPn1/4P1n1/3K4 w - - 0 1)

Pradignat, Emile Leonard

Chess Weekly, 1909

4Q3/bP3p2/1pNN4/1p1k1P2/1B6/4pPn1/4P1n1/3K4

#2

9 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sf1
      • 2.Qe4#
    • 1...Sh1
      • 2.Qe4#
    • 1...Sxe2
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
      • 2.fxe4#
    • 1...Sxf5
      • 2.Qe4#
    • 1...Sh5
      • 2.Qe4#
  • Tries
    • 1.Sxf7?
      • threat
        • 2.Qe6#
      • 1...Kc4
        • 2.Qe6#
      • 1...Sxf5
        • 2.Qe4#
      • 1...Sf4!
    • 1.b8S?
      • threat
        • 2.Qxf7#
        • 2.Qe5#
      • 1...Sf4
        • 2.Qe5#
      • 1...f6
        • 2.Qf7#
        • 2.Qe6#
        • 2.Qg8#
      • 1...Bxb8!
  • Keys
    • 1.Sc4!
      • 1...Kxc4
        • 2.Qxf7#
      • 1...Sxe2
        • 2.Qe4#
      • 1...Sxf5
        • 2.Qe4#
      • 1...bxc4
        • 2.Qd7#
      • 1...Bb8
        • 2.Sxb6#
      • 1...Se1
        • 2.Sxe3#
      • 1...Sf4
        • 2.Sxe3#
      • 1...Sh4
        • 2.Sxe3#
      • 1...Sf1
        • 2.Qe4#
      • 1...Sh1
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sh5
        • 2.Qe4#
      • 1...f6
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::QAB1(I)
    • S(c);N_GUARD,XP(B)::QAB1(I)
    • S(c);N_GUARD,XP(E)::QAB1(I)
  • Tries
    • Try
      • S(G);XP(h)
      • Threat
        • QAB1(I)
      • Vars
        • K(e);S_FLIGHT::QAB(I)
        • S(c);N_GUARD,XP(E)::QAB1(I)
      • Refutation
        • S(a);
    • Try
      • P(H);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAR1(I)
      • Refutation
        • B(g);XS(H)
  • Actual
    • S(G);
    • Vars
      • K(e);S_FLIGHT,XS(G)::QAB(I),XP(h)
      • S(c);N_GUARD,XP(B)::QAB1(I)
      • S(c);N_GUARD,XP(E)::QAB1(I)
      • P(d);SBLOCK,XS(G)::QAR2(I)
      • B(g);N_GUARD::S(G),XP(f)
      • S(a);N_GUARD::S(G),XP(b)
      • S(c);N_GUARD::QAB1(I)
      • S(c);N_GUARD::QAB1(I),XS(c)
      • P(h);N_GUARD::QAB1(I)
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