MESON Chess Problem Database

Problem Display
PID: 100920 (8/4Q2p/2P1N1p1/1RK1k3/3n3N/1p2bP2/2n5/4R3 w - - 0 1)

Elekes, Dezso

Good Companions, 1922

8/4Q2p/2P1N1p1/1RK1k3/3n3N/1p2bP2/2n5/4R3

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Rxe3#
    • 1...Sa3
      • 2.Rxe3#
    • 1...Sb4
      • 2.Rxe3#
    • 1...Sf5+
      • 2.Kc4#
    • 1...Sxc6+
      • 2.Kc4#
      • 2.Kxc6#
  • Tries
    • 1.Sxg6+?
      • 1...Kf5
        • 2.Qf7#
      • 1...hxg6!
  • Keys
    • 1.Sg2!
      • threat
        • 2.Sxd4#
      • 1...Se2+
        • 2.Sd4#
      • 1...Sxf3+
        • 2.Sd4#
      • 1...Sxb5+
        • 2.Sd4#
      • 1...Sf5+
        • 2.Kc4#
      • 1...Sxc6+
        • 2.Kc4#
        • 2.Kxc6#
      • 1...Sxe6+
        • 2.Kc4#
      • 1...Kf5
        • 2.Sg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::R(A),XB(c)
    • S(d);CHECK,N_GUARD::R(D)+K(E)
  • Tries
    • Try
      • S(C);CHECK,XP(f)
      • Vars
        • K(e);N_SPINB(c),P-FLIGHT::QAR2(H)
      • Refutation
        • P(g);XS(C)
  • Actual
    • S(C);
    • Threat
      • QAR(H)+S(G),XS(d)
    • Vars
      • S(d);CHECK,N_SPINB(c)::QAR(H)+S(G)
      • S(d);CHECK,XP(B)::QAR(H)+S(G)
      • S(d);CHECK,XR(D)::QAR(H)+S(G)
      • S(d);CHECK,N_GUARD,SBLOCK::R(D)+K(E)
      • S(d);CHECK,N_GUARD,P_SPINS(d),XS(G)::R(D)+K(E)
      • K(e);N_SPINB(c),P-FLIGHT::S(G)
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).