MESON Chess Problem Database

Problem Display
PID: 230655 (8/2BBKp1b/1Pp2P2/2pN1Np1/1p2k1pp/2Pp4/6P1/1Q6 w - - 0 1)

Labai, Zoltan

Best Problems, 2021

8/2BBKp1b/1Pp2P2/2pN1Np1/1p2k1pp/2Pp4/6P1/1Q6

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Qxd3#
    • 1...bxc3
      • 2.Sxc3#
    • 1...cxd5
      • 2.Qe1#
  • Tries
    • 1.Sxb4?
      • threat
        • 2.Qxd3#
        • 2.Qe1#
      • 1...c4
        • 2.Qe1#
      • 1...cxb4!
    • 1.Sf4?
      • threat
        • 2.Qxd3#
        • 2.Qe1#
      • 1...c4
        • 2.Qe1#
      • 1...gxf4!
    • 1.Qb3?
      • threat
        • 2.Qc4#
      • 1...c4
        • 2.Qxc4#
      • 1...cxd5!
    • 1.Qxb4+?
      • 1...Kxd5
        • 2.Se3#
      • 1...c4
        • 2.Qxc4#
      • 1...cxb4!
  • Keys
    • 1.Bxc6!
      • threat
        • 2.Sde3#
      • 1...Kxf5
        • 2.Qxd3#
      • 1...Bxf5
        • 2.Qe1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • K(c);N_SPINP(a),S_FLIGHT,XS(D)::QAR2(A),XP(a)
    • P(b);XP(C)::S(D),XP(b)
    • P(h);SBLOCK,XS(D)::QAR(A)
  • Tries
    • Try
      • S(D);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • P(f);::QAR(A)
      • Refutation
        • P(f);XS(D)
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);::QAR(A)
      • Refutation
        • P(g);XS(D)
    • Try
      • Q(A);N_PINP(a)
      • Threat
        • QAR2(A)
      • Vars
        • P(f);::QAR2(A),XP(f)
      • Refutation
        • P(h);XS(D)
    • Try
      • Q(A);CHECK,N_PINP(a),XP(b)
      • Vars
        • K(c);S_FLIGHT,XS(D)::S(E)
        • P(f);P_SPINP(f)::QAR2(A),XP(f)
      • Refutation
        • P(f);XQ(A)
  • Actual
    • B(I);XP(h)
    • Threat
      • B(I)+S(D)
    • Vars
      • K(c);S_FLIGHT,XS(E)::QAB(A),XP(a)
      • B(j);SBLOCK,XS(E)::QAR(A)
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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).