MESON Chess Problem Database

Problem Display
PID: 266652 (8/3K2Q1/3N1Pn1/4k1pn/3Rp1pR/8/2Bb1PPP/B4q2 w - - 0 1)

Radovic, Srecko

Sp. HM., SuperProblem 267. TT, 2022

8/3K2Q1/3N1Pn1/4k1pn/3Rp1pR/8/2Bb1PPP/B4q2

#2

11 + 8

1232 Kudesnik 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Rxe4#
    • 1...Bf4
      • 2.Rd1#
    • 1...Shf4
      • 2.f7#
    • 1...Sgf4
      • 2.Qxg5#
    • 1...e3
      • 2.Sf7#
    • 1...g3
      • 2.Rhxe4#
  • Tries
    • 1.Rd5+?
      • 1...Kf4
        • 2.Rf5#
      • 1...Kxd5!
    • 1.Qe7+?
      • 1...Kf4
        • 2.Rxe4#
        • 2.Qxe4#
      • 1...Sxe7!
  • Keys
    • 1.f4+!
      • 1...Kxf4
        • 2.Rxe4#
      • 1...Qxf4
        • 2.Rxd2#
      • 1...Bxf4
        • 2.Rd1#
      • 1...Shxf4
        • 2.f7#
      • 1...Sgxf4
        • 2.Qxg5#
      • 1...gxf4
        • 2.Rxh5#
      • 1...exf4 ep
        • 2.Sf7#
      • 1...gxf4 ep
        • 2.Rhxe4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • K(e);N_GUARD,P_SPINP(c),S_FLIGHT::R1(F),XP(c)
    • B(b);OGATE,SBLOCK::B(A)+R(F)
    • S(g);N_GUARD,SBLOCK::QAB(K)+P(I)
    • S(h);OGATE::QAR2(K),XP(f)
    • P(c);::S(H)
    • P(d);OGATE::R1(G),XP(c)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • K(e);OGATE,P_SPINP(d),S_FLIGHT::R1(F)
      • Refutation
        • K(e);P-FLIGHT,XR(F)
    • Try
      • Q(K);CHECK
      • Refutation
        • S(h);XQ(K)
  • Actual
    • P(C);CHECK
    • Vars
      • K(e);N_GUARD,P_SPINP(c),S_FLIGHT,XP(C)::R1(F),XP(c)
      • Q(a);SBLOCK,XP(C)::B(A)+R(F),XB(b)
      • B(b);OGATE,SBLOCK,XP(C)::B(A)+R(F)
      • S(g);SBLOCK,XP(C)::QAB(K)+P(I)
      • S(h);OGATE,XP(C)::QAR2(K),XP(f)
      • P(f);SBLOCK,S_CUTB(b),S_CUTQ(a),S_CUTS(h),XP(C)::R(G),XS(g)
      • P(c);EP,XP(C)::S(H)
      • P(d);EP,OGATE,XP(C)::R1(G),XP(c)
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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).