MESON Chess Problem Database

Problem Display
PID: 204554 (B2BQ3/1q1p3K/2k5/n1p2N2/n1P2b2/8/8/1R6 w - - 0 1)

Hertmann, Sandor

Nepszava, 1925

B2BQ3/1q1p3K/2k5/n1p2N2/n1P2b2/8/8/1R6

#2

7 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bd6
      • 2.Qe4#
    • 1...Sc3
      • 2.Rb6#
    • 1...Sb6
      • 2.Rxb6#
    • 1...Sxc4
      • 2.Bxb7#
  • Tries
    • 1.Sd4+?
      • 1...Kd6
        • 2.Qe7#
      • 1...cxd4!
    • 1.Qg6+?
      • 1...Bd6
        • 2.Se7#
        • 2.Qg2#
        • 2.Qxd6#
      • 1...d6+!
    • 1.Qe6+?
      • 1...Bd6
        • 2.Se7#
        • 2.Qd5#
        • 2.Qe4#
        • 2.Qxd6#
      • 1...d6+
        • 2.Se7#
      • 1...dxe6+!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qd5#
      • 1...Sxc4
        • 2.Bxb7#
      • 1...Sc3
        • 2.Rb6#
      • 1...Sb6
        • 2.Rxb6#
      • 1...d5
        • 2.cxd5#
      • 1...d6
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(b);::QAB(G)
    • S(a);N_GUARD::R1(A)
    • S(a);N_GUARD::R1(A),XS(a)
    • S(c);N_GUARD,XP(B)::B(E),XQ(f)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(e);N_SPINP(g),N_SPINQ(f),P-FLIGHT::QAB1(G)
      • Refutation
        • P(d);XS(C)
    • Try
      • Q(G);CHECK,N_PINP(g)
      • Refutation
        • P(g);CHECK,P_SPINP(g)
    • Try
      • Q(G);CHECK,N_PINP(g)
      • Vars
        • P(g);CHECK,P_SPINP(g)::S(C)
      • Refutation
        • P(g);CHECK,XQ(G)
  • Actual
    • Q(G);N_PINP(g)
    • Threat
      • QAB1(G)
    • Vars
      • S(c);N_GUARD,XP(B)::B(E),XQ(f)
      • S(a);N_GUARD::R1(A)
      • S(a);N_GUARD::R1(A),XS(a)
      • P(g);OGATE,P_PINQ(G)::P(B),XP(g)
      • P(g);OGATE,P_PINQ(G)::QAR1(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).