MESON Chess Problem Database

Problem Display
PID: 54765 (q1n2r2/Br3P2/1pN3p1/PQ6/R1BN1k2/1K1P2p1/2P1Pp2/8 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

2nd Prize, Milenium Gdanska, 1998

q1n2r2/Br3P2/1pN3p1/PQ6/R1BN1k2/1K1P2p1/2P1Pp2/8

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Qg5#
  • Tries
    • 1.Be6?
      • threat
        • 2.Qe5#
      • 1...Ke3
        • 2.Qg5#
      • 1...bxa5
        • 2.Sf3#
      • 1...Qb8!
    • 1.Qf5+?
      • 1...Ke3
        • 2.Qg5#
      • 1...gxf5!
    • 1.e3+?
      • 1...Kxe3
        • 2.Qg5#
      • 1...Kg4!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Qg5#
      • 1...Ke3
        • 2.Qe5#
      • 1...Kg4
        • 2.Be6#
      • 1...bxa5
        • 2.Be6#
      • 1...g5
        • 2.Qxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::QAB(I)
  • Tries
    • Try
      • B(F);
      • Threat
        • QAB1(I)
      • Vars
        • K(c);S_FLIGHT::QAB(I)
        • P(d);P_PINQ(I),XP(H)::R(E)+S(G)
      • Refutation
        • Q(g);
    • Try
      • Q(I);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB(I)
      • Refutation
        • P(e);XQ(I)
    • Try
      • P(B);CHECK
      • Vars
        • K(c);S_FLIGHT,XP(B)::QAB(I)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • S(G);
    • Threat
      • QAB1(I)
    • Vars
      • K(c);P_SPINP(d),S_FLIGHT::QAR2(I)
      • K(c);P-FLIGHT::R(E)+B(F),DCHECK
      • P(d);P_PINQ(I),XP(H)::R(E)+B(F)
      • P(e);::QAB1(I),XP(e)
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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).