MESON Chess Problem Database

Problem Display
PID: 225860 (2q5/4B1p1/3PR2N/2pkb1P1/Q1r2R1K/3pPpp1/B2nNP2/8 w - - 0 1)

Sindler, Ivan

Praca, 1952

2q5/4B1p1/3PR2N/2pkb1P1/Q1r2R1K/3pPpp1/B2nNP2/8

#2

12 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe6
      • 2.Qa8#
    • 1...Bxf4
      • 2.Sxf4#
    • 1...Sb1
      • 2.Bxc4#
    • 1...Sf1
      • 2.Bxc4#
    • 1...Se4
      • 2.Bxc4#
  • Tries
    • 1.e4+?
      • 1...Sxe4
        • 2.Bxc4#
      • 1...Kxe6!
  • Keys
    • 1.Re4!
      • threat
        • 2.Rxe5#
      • 1...Kxe4
        • 2.Sc3#
      • 1...Kxe6
        • 2.Sf4#
      • 1...Qxe6
        • 2.Qa8#
      • 1...Bxd6
        • 2.Sc3#
      • 1...Sxe4
        • 2.Bxc4#
      • 1...Ba1
        • 2.Sf4#
      • 1...Bb2
        • 2.Sf4#
      • 1...Bc3
        • 2.Sxc3#
        • 2.Sf4#
      • 1...Bd4
        • 2.Sf4#
      • 1...Bf4
        • 2.Sc3#
        • 2.Sxf4#
      • 1...Bf6
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • Q(j);N_GUARD,SBLOCK,XR(J)::QAB(E)
    • B(h);XR(F)::S(B),XB(h)
    • S(a);N_GUARD::B(A),XR(e)
    • S(a);N_GUARD,N_PINR(F)::B(A),XR(e)
  • Tries
    • Try
      • P(D);CHECK,N_SPINR(F)
      • Vars
        • S(a);XP(D)::B(A),XR(e)
      • Refutation
        • K(g);S_FLIGHT,XR(J)
  • Actual
    • R(F);
    • Threat
      • R1(J),XB(h)
    • Vars
      • K(g);P_SPINB(h),S_FLIGHT,XR(F)::S(B)
      • K(g);P_SPINB(h),S_FLIGHT,XR(J)::S(B)
      • Q(j);N_GUARD,SBLOCK,XR(J)::QAB(E)
      • B(h);N_GUARD,XP(I)::S(B)
      • S(a);N_GUARD,SBLOCK,XR(F)::B(A),XR(e)
      • B(h);N_GUARD::S(B)
      • B(h);N_GUARD,N_PINR(F)::S(B)
      • B(h);N_GUARD,P_PINP(H)::S(B)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).