MESON Chess Problem Database

Problem Display
PID: 263180 (8/3N4/4B3/7p/pp1kP1bR/2rN1p2/1BP2P1K/r2nQ3 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

SuperProblem, 2021

8/3N4/4B3/7p/pp1kP1bR/2rN1p2/1BP2P1K/r2nQ3

#2

10 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bf5
      • 2.exf5#
    • 1...Sxb2
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
  • Tries
    • 1.S3e5?
      • threat
        • 2.Sc6#
      • 1...Bxe6
        • 2.Qd2#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sxb2!
    • 1.S7e5?
      • threat
        • 2.Sc6#
      • 1...Sxb2
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Bxe6!
    • 1.Sb8?
      • threat
        • 2.Sc6#
      • 1...Sxb2
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Bxe6!
    • 1.Bxc3+?
      • 1...Sxc3
        • 2.Qe3#
      • 1...bxc3!
  • Keys
    • 1.Qd2!
      • threat
        • 2.S3c5#
      • 1...Kxe4
        • 2.Qf4#
      • 1...Bxe6
        • 2.S3e5#
      • 1...Sxb2
        • 2.Qe3#
      • 1...Sxf2
        • 2.Sxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(h);OGATE::R(H)+P(G),XB(h)
    • S(b);N_GUARD,N_SPINR(c),XB(B)::QAB1(A)
    • S(b);N_GUARD::QAB1(A),XS(b)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • B(h);XB(I)::QAR2(A)
        • S(b);N_GUARD::QAB1(A),XS(b)
      • Refutation
        • S(b);N_SPINR(c),XB(B)
    • Try
      • S(J);
      • Threat
        • S(J)
      • Vars
        • S(b);N_GUARD,N_SPINR(c),XB(B)::QAB1(A)
        • S(b);N_GUARD::QAB1(A),XS(b)
      • Refutation
        • B(h);XB(I)
    • Try
      • S(J);
      • Threat
        • S(J)
      • Vars
        • S(b);N_GUARD,N_SPINR(c),XB(B)::QAB1(A)
        • S(b);N_GUARD::QAB1(A),XS(b)
      • Refutation
        • B(h);XB(I)
    • Try
      • B(B);CHECK,XR(c)
      • Vars
        • S(b);SBLOCK,XB(B)::QAB1(A)
      • Refutation
        • P(f);XB(B)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)+S(F)
    • Vars
      • K(g);N_SPINR(c),OGATEB,P-FLIGHT,P_SPINB(h),XP(G)::QAR1(A)
      • B(h);XB(I)::QAR(A)+S(F)
      • S(b);N_GUARD,N_SPINR(c),XB(B)::QAB1(A)
      • S(b);XP(D)::QAR(A)+S(F),XS(b)
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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).