MESON Chess Problem Database

Problem Display
PID: 198414 (B2rr2N/6N1/3P1p1p/4k3/7K/2P5/8/Q4n2 w - - 0 1)

Kovacs, Norbert

Bekes, 1920

B2rr2N/6N1/3P1p1p/4k3/7K/2P5/8/Q4n2

#2

7 + 6

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd6
      • 2.Sg6#
  • Tries
    • 1.Qe1+?
      • 1...Kf4
        • 2.Sg6#
      • 1...Se3
        • 2.Qg3#
      • 1...Kxd6!
    • 1.Qa4?
      • threat
        • 2.Sf7#
        • 2.Qd4#
      • 1...Rxd6
        • 2.Sg6#
        • 2.Sf7#
        • 2.Qe4#
      • 1...Rxa8
        • 2.Qd4#
      • 1...Rxh8
        • 2.Qd4#
      • 1...f5
        • 2.Qd4#
      • 1...Rd7
        • 2.Qd4#
      • 1...Re7
        • 2.Qd4#
      • 1...Rf8
        • 2.Qd4#
      • 1...Kxd6!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Qd4#
      • 1...Kf4
        • 2.Sg6#
      • 1...Kxd6
        • 2.Sf7#
      • 1...Rxd6
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(e);SBLOCK,XP(D)::S(G)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::S(G)
        • S(a);N_GUARD,P_SPINS(a)::QAB(A)
      • Refutation
        • K(b);S_FLIGHT,XP(D)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);XB(F)::QAB1(A)
        • R(f);XS(G)::QAB1(A)
        • P(c);::QAB1(A)
        • R(e);::QAB1(A)
        • R(f);::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT,XP(D)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(b);S_FLIGHT::S(G)
      • K(b);S_FLIGHT,XP(D)::S(G)
      • R(e);SBLOCK,XP(D)::S(G)
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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).