MESON Chess Problem Database

Problem Display
PID: 204521 (2Q2q2/1pR2N2/bp2PpPb/5k1K/3P4/2n3P1/4p1B1/8 w - - 0 1)

Elbogen, Arpad

Nepszava, 1925

2Q2q2/1pR2N2/bp2PpPb/5k1K/3P4/2n3P1/4p1B1/8

#2

9 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Sxh6#
      • 2.e7#
    • 1...Qb4
      • 2.Sxh6#
      • 2.e7#
    • 1...Qc5
      • 2.Sxh6#
      • 2.e7#
    • 1...Qd6
      • 2.Sxd6#
      • 2.Sxh6#
    • 1...Qe7
      • 2.Sxh6#
    • 1...Qg7
      • 2.Sd6#
      • 2.e7#
    • 1...Qxf7
      • 2.exf7#
    • 1...Qd8
      • 2.Sxh6#
    • 1...Qe8
      • 2.Sd6#
      • 2.Sxh6#
    • 1...Qg8
      • 2.Sd6#
      • 2.Sxh6#
    • 1...Qh8
      • 2.Sd6#
    • 1...Bf4
      • 2.g4#
    • 1...Se4
      • 2.Bh3#
  • Tries
    • 1.Rc5+?
      • 1...Qxc5
        • 2.Sxh6#
      • 1...Sd5
        • 2.Rxd5#
      • 1...bxc5!
  • Keys
    • 1.Re7!
      • threat
        • 2.Sd6#
      • 1...Qxe7
        • 2.Sxh6#
      • 1...Qxf7
        • 2.exf7#
      • 1...Qd8
        • 2.Sxh6#
      • 1...Bf4
        • 2.g4#
      • 1...Se4
        • 2.Bh3#
      • 1...Sb5
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(i);N_GUARD::S(H),XB(g)
    • Q(i);OGATE,P_PINP(F),XS(H)::QAB(I)+P(E),XQ(i)
    • Q(i);N_GUARD::S(H)
    • B(g);SBLOCK::P(B)
    • S(b);SBLOCK::B(A)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • Q(i);XR(G)::S(H),XB(g)
        • S(b);N_GUARD,P_SPINS(b)::R(G),XS(b)
      • Refutation
        • P(e);XR(G)
  • Actual
    • R(G);
    • Threat
      • S(H)
    • Vars
      • Q(i);N_GUARD,XR(G)::S(H),XB(g)
      • Q(i);OGATE,P_PINP(F),XS(H)::QAB(I)+P(E),XQ(i)
      • Q(i);N_GUARD::S(H),XB(g)
      • B(g);SBLOCK::P(B)
      • S(b);SBLOCK::B(A)
      • S(b);OGATE::QAB(I)
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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).