MESON Chess Problem Database

Problem Display
PID: 275221 (2N1rnB1/4p1p1/r4k1P/1pN2P1P/q1p1p2K/8/Q2P3B/1b3R2 w - - 0 1)

Felber, Stefan

Peris-120 MT (Problemas), 2024

2N1rnB1/4p1p1/r4k1P/1pN2P1P/q1p1p2K/8/Q2P3B/1b3R2

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Re6
      • 2.fxe6#
    • 1...Bxa2
      • 2.Sxe4#
    • 1...Se6
      • 2.Sd7#
      • 2.fxe6#
    • 1...Sg6+
      • 2.fxg6#
    • 1...Sd7
      • 2.Sxd7#
    • 1...Sh7
      • 2.Sd7#
    • 1...c3
      • 2.Qf7#
    • 1...e5
      • 2.fxe5 ep#
    • 1...e6
      • 2.fxe6#
    • 1...g5+
      • 2.fxg5 ep#
    • 1...g6
      • 2.fxg6#
  • Tries
    • 1.Qb2+?
      • 1...e5
        • 2.fxe5 ep#
      • 1...c3!
  • Keys
    • 1.d4!
      • threat
        • 2.Be5#
      • 1...Sg6+
        • 2.fxg6#
      • 1...g5+
        • 2.fxg5 ep#
      • 1...cxd4 ep
        • 2.Qf7#
      • 1...exd4 ep
        • 2.Se4#
      • 1...Re6
        • 2.fxe6#
      • 1...Sd7
        • 2.Sxd7#
      • 1...e5
        • 2.fxe5 ep#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(f);OGATE::R(A)+P(G),XR(f)
    • B(a);N_GUARD,XQ(B)::S(F),XP(d)
    • S(k);CHECK,OGATE::R(A)+P(G),XS(k)
    • S(k);N_GUARD::S(F),XS(k)
    • S(k);N_GUARD::S(F)
    • P(c);OGATE::QAR1(B)
    • P(h);OGATE::R(A)+P(G),XP(h),EP
    • P(h);OGATE::R(A)+P(G),XP(h)
    • P(i);CHECK,OGATE::R(A)+P(G),XP(i),EP
    • P(i);OGATE::R(A)+P(G),XP(i)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • P(h);OGATE,P_SPINP(h)::R(A)+P(G)DCHECK,XP(h),EP
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • P(C);
    • Threat
      • B(D)
    • Vars
      • S(k);CHECK,OGATE::R(A)+P(G),XS(k)
      • P(i);CHECK,OGATE::R(A)+P(G),XP(i),EP
      • P(c);EP,OGATE,XP(C)::QAR1(B)
      • P(d);EP,S_CUTB(a),XP(C)::S(F)
      • R(f);OGATE::R(A)+P(G),XR(f)
      • S(k);N_GUARD::S(F),XS(k)
      • P(h);OGATE::R(A)+P(G),XP(h),EP
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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).