MESON Chess Problem Database

Problem Display
PID: 238841 (4NK2/5nP1/nB1N1p2/3kP3/5R2/3B1r1Q/2Rpq3/b7 w - - 0 1)

Labai, Zoltan

idee & form, 1992

4NK2/5nP1/nB1N1p2/3kP3/5R2/3B1r1Q/2Rpq3/b7

#2

10 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Qf5#
    • 1...Sb4
      • 2.Rc5#
    • 1...Sc5
      • 2.Rxc5#
    • 1...Sc7
      • 2.Rc5#
    • 1...Sb8
      • 2.Rc5#
  • Tries
    • 1.Sc7+?
      • 1...Sxc7
        • 2.Rc5#
      • 1...Kxe5!
    • 1.Be4+?
      • 1...Kxe5
        • 2.Qf5#
      • 1...Qxe4!
    • 1.Rd4+?
      • 1...Kxe5
        • 2.Sc4#
        • 2.Sxf7#
      • 1...Bxd4!
    • 1.Qf5?
      • threat
        • 2.Sxf6#
      • 1...Qxe5
        • 2.Be4#
      • 1...Bxe5
        • 2.Rd4#
      • 1...Sxe5
        • 2.g8Q#
        • 2.g8B#
      • 1...fxe5
        • 2.Qxf7#
      • 1...Sc5
        • 2.Rxc5#
      • 1...Bc3!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Sxf7#
      • 1...Kxe5
        • 2.Qf5#
      • 1...Qxe5
        • 2.Bc4#
      • 1...Bxe5
        • 2.Qxf7#
      • 1...Sxe5
        • 2.Sxf6#
      • 1...Sxd6
        • 2.Qxd6#
      • 1...Sc5
        • 2.Rxc5#
      • 1...Sb8
        • 2.Rc5#
      • 1...Sg5
        • 2.Sc4#
        • 2.Sf7#
      • 1...Sh6
        • 2.Sc4#
        • 2.Sf7#
      • 1...Sd8
        • 2.Sc4#
        • 2.Sf7#
      • 1...Sh8
        • 2.Sc4#
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • K(e);OGATEB,P-FLIGHT,XP(E)::QAR1(C)
    • S(f);N_GUARD::R1(A)
    • S(f);N_GUARD::R1(A),XS(f)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • S(f);XS(I)::R1(A)
      • Refutation
        • K(e);P-FLIGHT,XP(E)
    • Try
      • B(B);CHECK
      • Vars
        • K(e);P-FLIGHT,XP(E)::QAR1(C)
      • Refutation
        • Q(c);XB(B)
    • Try
      • R(D);CHECK
      • Refutation
        • B(a);XR(D)
    • Try
      • Q(C);
      • Threat
        • S(I),XP(g)
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c),XP(E)::B(B)
        • B(a);N_GUARD,P_SPINB(a),XP(E)::R1(D)
        • S(h);P_SPINS(h),XP(E)::P=Q
        • P(g);OGATE,P_SPINP(g),SBLOCK,XP(E)::QAB(C),XS(h)
        • S(f);N_GUARD::R1(A),XS(f)
      • Refutation
        • B(a);
  • Actual
    • Q(C);
    • Threat
      • QAR(C)+S(G),XS(h)
    • Vars
      • K(e);OGATEB,P-FLIGHT,XP(E)::QAR1(C)
      • Q(c);N_GUARD,SBLOCK,XP(E)::B(B)
      • B(a);SBLOCK,XP(E)::QAB(C),XS(h)
      • S(h);SBLOCK,XP(E)::S(I),XP(g)
      • S(h);OGATE,P_SPINS(h),XS(G)::QAR1(C),XS(h)
      • S(f);N_GUARD::R1(A),XS(f)
      • S(f);N_GUARD::R1(A)
HTML5 logo

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).