MESON Chess Problem Database

Problem Display
PID: 40198 (5BB1/1p2P1p1/6n1/R2pk3/1Qpp1RrP/K1Pn1rNq/7P/7b w - - 0 1)

Lindner, Laszlo

Comm., Magyar Sakkvilag, 1939

5BB1/1p2P1p1/6n1/R2pk3/1Qpp1RrP/K1Pn1rNq/7P/7b

#2

11 + 12

4080 Mattbilder eines Lebens 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.Rf5#
    • 1...Sdxf4
      • 2.Bxg7#
  • Tries
    • 1.Re4+?
      • 1...Kf6
        • 2.Re6#
        • 2.Qd6#
        • 2.Qb6#
        • 2.e8S#
      • 1...Rxe4!
    • 1.e8Q+?
      • 1...Se7
        • 2.Qb8#
      • 1...Kxf4!
    • 1.e8S?
      • threat
        • 2.Bd6#
        • 2.Qd6#
      • 1...Sxb4
        • 2.Bd6#
      • 1...Sxf8
        • 2.Qd6#
      • 1...Sc5
        • 2.Bd6#
      • 1...Se7
        • 2.Qd6#
      • 1...Kxf4!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qc7#
      • 1...Kxf4
        • 2.Qxd4#
      • 1...Rfxf4
        • 2.Qe6#
      • 1...Rgxf4
        • 2.Rxd5#
      • 1...Sdxf4
        • 2.Bxg7#
      • 1...Sgxf4
        • 2.cxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(c);N_GUARD::R1(F)
    • S(b);P_PINP(C),SBLOCK,XR(F)::B(J),XP(l)
  • Tries
    • Try
      • R(F);CHECK
      • Refutation
        • R(g);XR(F)
    • Try
      • P(I);CHECK
      • Vars
        • S(j);P_SPINS(j)::QAB(I)
      • Refutation
        • K(i);N_SPINP(h),S_FLIGHT,XR(F)
    • Try
      • P(I);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);P_PINP(C),XQ(E)::B(J)
        • S(j);XB(J)::QAB1(E)
        • S(b);N_SPINP(h),P_PINP(C)::B(J)
        • S(j);::QAB1(E)
      • Refutation
        • K(i);N_SPINP(h),S_FLIGHT,XR(F)
  • Actual
    • Q(E);
    • Threat
      • QAB(E)
    • Vars
      • K(i);N_SPINP(h),S_FLIGHT,XR(F)::QAR2(E),XP(f)
      • R(c);SBLOCK,XR(F)::QAR1(E)
      • R(g);SBLOCK,XR(F)::R1(H),XP(h)
      • S(b);P_PINP(C),SBLOCK,XR(F)::B(J),XP(l)
      • S(j);SBLOCK,XR(F)::P(C),XP(f)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).