MESON Chess Problem Database

Problem Display
PID: 234346 (B2r1R2/2N1p1N1/2np1P2/R1p2ppK/2pPk3/1pP3B1/4P3/2Q5 w - - 0 1)

Doukhan, Gerard

Phenix, 2020

B2r1R2/2N1p1N1/2np1P2/R1p2ppK/2pPk3/1pP3B1/4P3/2Q5

#2

12 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...g4
      • 2.Qf4#
  • Tries
    • 1.Sd5?
      • threat
        • 2.Qh1#
      • 1...Kxd5
        • 2.Qh1#
      • 1...Sxd4
        • 2.Qe3#
      • 1...Se5
        • 2.Qe3#
      • 1...f4!
    • 1.Bf2?
      • threat
        • 2.Qe3#
      • 1...f4
        • 2.Qb1#
      • 1...cxd4!
    • 1.Qxg5?
      • threat
        • 2.Qf4#
      • 1...f4
        • 2.Qxf4#
      • 1...e5!
    • 1.Qf1?
      • threat
        • 2.Qf3#
      • 1...g4
        • 2.Qf4#
      • 1...Ke3!
    • 1.Qc2+?
      • 1...Ke3
        • 2.Sd5#
        • 2.Sxf5#
      • 1...bxc2!
  • Keys
    • 1.Sxf5!
      • threat
        • 2.Qb1#
      • 1...Kxf5
        • 2.Qb1#
      • 1...cxd4
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(f);N_GUARD::QAR1(A)
  • Tries
    • Try
      • S(I);N_PINS(g)
      • Threat
        • QAB(A)
      • Vars
        • K(c);P_SPINP(d),P_SPINS(g),S_FLIGHT,XS(I)::QAB(A)
        • S(g);XP(E)::QAR1(A)
        • S(g);::QAR1(A)
      • Refutation
        • P(e);
    • Try
      • B(D);
      • Threat
        • QAR1(A)
      • Vars
        • P(e);SBLOCK::QAB(A)
      • Refutation
        • P(d);XP(E)
    • Try
      • Q(A);XP(f)
      • Threat
        • QAR1(A)
      • Vars
        • P(e);::QAR1(A),XP(e)
      • Refutation
        • P(i);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • P(f);N_GUARD::QAR1(A)
      • Refutation
        • K(c);N_SPINS(g),P-FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • P(a);XQ(A)
  • Actual
    • S(J);XP(e)
    • Threat
      • QAB(A)
    • Vars
      • K(c);N_SPINS(g),P_SPINP(d),S_FLIGHT,XS(J)::QAB(A)
      • P(d);XP(E)::QAB(A)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).