MESON Chess Problem Database

Problem Display
PID: 269423 (2r5/4r2p/1R2p3/PNk1P2K/1pP1Pp1p/4q3/bN6/n2R2B1 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Problem Paradise, 2023

2r5/4r2p/1R2p3/PNk1P2K/1pP1Pp1p/4q3/bN6/n2R2B1

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qf2
      • 2.Bxf2#
    • 1...Qd4
      • 2.Bxd4#
    • 1...Bxc4
      • 2.Sa4#
    • 1...f3
      • 2.Bxe3#
  • Tries
    • 1.Rc1?
      • threat
        • 2.Sd3#
        • 2.Sa4#
      • 1...b3
        • 2.Sd3#
      • 1...Bb3
        • 2.Sd3#
      • 1...Rd7
        • 2.Sa4#
      • 1...Rd8
        • 2.Sa4#
      • 1...Bb1
        • 2.Sa4#
      • 1...Sc2!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Rb5#
      • 1...Qe2+
        • 2.Sxe2#
      • 1...Qf3+
        • 2.Sxf3#
      • 1...Qxd4
        • 2.Bxd4#
      • 1...Bxc4
        • 2.Sa4#
      • 1...Rb7
        • 2.Sxe6#
      • 1...Rb8
        • 2.Rc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(c);OGATEB::B(B),XQ(c)
    • Q(c);OGATE::B(B),XQ(c)
    • B(b);SBLOCK,XP(D)::S(C)
    • P(e);N_GUARD::B(B),XQ(c)
  • Tries
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);::S(C)
        • B(b);::S(C)
        • R(i);::S(C)
        • R(k);::S(C)
      • Refutation
        • S(a);
  • Actual
    • S(G);N_PINQ(c)
    • Threat
      • R1(J)
    • Vars
      • Q(c);CHECK::B(B)+S(G),XQ(c)
      • Q(c);OGATE,P_SPINQ(c),XS(G)::B(B),XQ(c)
      • B(b);SBLOCK,XP(D)::S(C)
      • R(i);N_GUARD::S(G),XP(h)
      • R(k);N_GUARD::R1(J)
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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).