MESON Chess Problem Database

Problem Display
PID: 124419 (3N4/ppr3P1/1n4RK/Qbk1PpB1/B1P2R2/P1NP4/1r2n3/8 w - - 0 1)

Vogel, Peter

Source?, 0000

3N4/ppr3P1/1n4RK/Qbk1PpB1/B1P2R2/P1NP4/1r2n3/8

#2

13 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Qb4#
      • 2.Qxb5#
    • 1...Rc2
      • 2.Qb4#
      • 2.Qxb5#
    • 1...Rd2
      • 2.Qb4#
      • 2.Qxb5#
    • 1...Rb4
      • 2.Qxb4#
      • 2.axb4#
    • 1...Rc6
      • 2.Sxb7#
    • 1...Re7
      • 2.Bxe7#
    • 1...Rc8
      • 2.Sxb7#
      • 2.Be7#
    • 1...Sxa4
      • 2.Sxa4#
    • 1...Sxc4
      • 2.Rxc4#
    • 1...Sd7
      • 2.Be7#
    • 1...a6
      • 2.Qxb6#
  • Tries
    • 1.Rc6+?
      • 1...bxc6
        • 2.Se6#
      • 1...Rxc6+!
  • Keys
    • 1.Qxa7!
      • threat
        • 2.Qxb6#
      • 1...Bxa4
        • 2.Sxa4#
      • 1...Bxc4
        • 2.Rxc4#
      • 1...Rc6
        • 2.Sxb7#
      • 1...Ba6
        • 2.Se6#
      • 1...Bc6
        • 2.Se6#
      • 1...Bd7
        • 2.Be7#
      • 1...Be8
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • R(i);N_GUARD,P_PINR(J)::S(M),XP(h)
    • R(i);N_GUARD::B(I),XR(i)
    • S(f);XB(D)::S(B),XS(f)
    • S(f);OGATE,XP(E)::R1(F),XS(f)
    • S(f);S_CUTR(i)::B(I)
    • P(g);N_GUARD::QAB1(G),XS(f)
  • Tries
    • Try
      • R(J);CHECK
      • Vars
        • P(h);SBLOCK,XR(J)::S(M)
      • Refutation
        • R(i);CHECK,XR(J)
  • Actual
    • Q(G);N_PINB(c),P_PINS(f),XP(g)
    • Threat
      • QAB1(G),XS(f)
    • Vars
      • B(c);XB(D)::S(B),XB(c)
      • B(c);OGATE,XP(E)::R1(F),XB(c)
      • R(i);N_GUARD,P_PINR(J)::S(M),XP(h)
      • B(c);::S(M)
      • B(c);S_CUTR(i)::B(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).