MESON Chess Problem Database

Problem Display
PID: 207555 (8/2p5/n1R1K1p1/pb4P1/2p1kp2/RN2P3/3P4/5Q2 w - - 0 1)

Meszena, Istvan

Vasarnapi Ujsag, 1872

8/2p5/n1R1K1p1/pb4P1/2p1kp2/RN2P3/3P4/5Q2

#2

8 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ba4
      • 2.Rxc4#
    • 1...Sb4
      • 2.Sc5#
    • 1...Sc5+
      • 2.Sxc5#
    • 1...Sb8
      • 2.Sc5#
    • 1...f3
      • 2.Qb1#
  • Tries
    • 1.Rc5?
      • threat
        • 2.Re5#
      • 1...Sxc5+
        • 2.Sxc5#
      • 1...Bd7+!
    • 1.Qh1+?
      • 1...f3
        • 2.Qb1#
      • 1...Kd3!
    • 1.d3+?
      • 1...cxd3
        • 2.Qxf4#
      • 1...Kxe3!
  • Keys
    • 1.Ra4!
      • 1...Sc5+
        • 2.Sxc5#
      • 1...Bxa4
        • 2.Rxc4#
      • 1...Bxc6
        • 2.Rxc4#
      • 1...fxe3
        • 2.d3#
      • 1...Sb4
        • 2.Sc5#
      • 1...Sb8
        • 2.Sc5#
      • 1...f3
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(e);N_GUARD::R(G),XP(a)
    • S(f);N_GUARD::S(D)
    • S(f);CHECK,N_GUARD::S(D),XS(f)
    • P(c);SBLOCK::QAB(A)
  • Tries
    • Try
      • R(G);
      • Threat
        • R1(G)
      • Vars
        • S(f);CHECK,XR(G)::S(D),XS(f)
      • Refutation
        • B(e);CHECK
    • Try
      • Q(A);CHECK
      • Vars
        • P(c);P_SPINP(c),SBLOCK::QAB(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(B);CHECK
      • Vars
        • P(a);SBLOCK,XP(B)::QAR1(A),XP(c)
      • Refutation
        • K(b);P-FLIGHT,XP(E)
  • Actual
    • R(C);P_PINP(a)
    • Vars
      • S(f);CHECK,N_GUARD::S(D),XS(f)
      • B(e);N_GUARD,N_SPINP(a),XR(C)::R(G),XP(a)
      • B(e);N_GUARD,XR(G)::R(C),XP(a)
      • P(c);SBLOCK,XP(E)::P(B)
      • S(f);N_GUARD,N_SPINP(a)::S(D)
      • S(f);N_GUARD::S(D)
      • P(c);SBLOCK::QAB(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).