MESON Chess Problem Database

Problem Display
PID: 284099 (3R2b1/3B4/8/2pk4/PbN2RpK/1p5p/4pNq1/4rn1Q w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Zaragoza-65 JT (Problemas), 2025

3R2b1/3B4/8/2pk4/PbN2RpK/1p5p/4pNq1/4rn1Q

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Qxe4#
    • 1...h2
      • 2.Qxg2#
  • Tries
    • 1.Sxg4?
      • threat
        • 2.Sf6#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Bc3!
    • 1.Bc6+?
      • 1...Ke6
        • 2.Re8#
      • 1...Kxc6!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sf6#
      • 1...Qf2+
        • 2.Sxf2#
      • 1...Qg3+
        • 2.Sxg3#
      • 1...Kxc4
        • 2.Bb5#
      • 1...Kd4
        • 2.Be6#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...Bc3
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • Q(d);OGATE::QAB1(A),XQ(d)
    • P(f);N_GUARD::QAB(A),XQ(d)
  • Tries
    • Try
      • S(B);XP(h)
      • Threat
        • S(B)
      • Vars
        • Q(d);OGATE::QAB1(A),XQ(d)
      • Refutation
        • B(g);
    • Try
      • B(G);CHECK
      • Vars
        • K(j);N_GUARD,N_SPINQ(d),S_FLIGHT::R(H)
      • Refutation
        • K(j);S_FLIGHT,XB(G)
  • Actual
    • S(B);N_PINQ(d)
    • Threat
      • S(B)
    • Vars
      • Q(d);CHECK::QAB(A)+S(B),XQ(d)
      • K(j);N_GUARD,S_FLIGHT,XS(D)::B(G)
      • K(j);N_GUARD,P-FLIGHT::R(H)+B(G)
      • Q(d);OGATE,P_SPINQ(d),XS(B)::QAB1(A),XQ(d)
      • B(g);N_GUARD::S(B),XB(g)
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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).