MESON Chess Problem Database

Problem Display
PID: 257547 (2N1b1B1/8/K1pnNp2/2p1kr2/p1Q1nR2/2bpB3/8/3q4 w - - 0 1)

Witt, Andreas

Phenix, 2021

2N1b1B1/8/K1pnNp2/2p1kr2/p1Q1nR2/2bpB3/8/3q4

#2

7 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Qxc5#
    • 1...Sf2
      • 2.Qxc5#
    • 1...Sg3
      • 2.Qxc5#
    • 1...Sg5
      • 2.Qxc5#
    • 1...Sb5
      • 2.Rxe4#
      • 2.Qxe4#
    • 1...Sb7
      • 2.Rxe4#
      • 2.Qxe4#
    • 1...Sf7
      • 2.Rxe4#
      • 2.Qxe4#
  • Tries
    • 1.Sd4?
      • threat
        • 2.Qe6#
      • 1...Sxc4
        • 2.Rxf5#
      • 1...Qb3
        • 2.Sf3#
      • 1...Bf7
        • 2.Sxc6#
      • 1...Sg5
        • 2.Qxc5#
      • 1...Bd7!
    • 1.Rxf5+?
      • 1...Sxf5
        • 2.Bf4#
      • 1...Kxf5!
    • 1.Qxc3+?
      • 1...Kd5
        • 2.Sc7#
        • 2.Sb6#
        • 2.Se7#
      • 1...Sxc3!
  • Keys
    • 1.Sxc5!
      • threat
        • 2.Qe6#
      • 1...Sxc5+
        • 2.Qxc5#
      • 1...Sxc4
        • 2.Rxe4#
      • 1...Qb3
        • 2.Sxd3#
      • 1...Bd7
        • 2.Sxd7#
      • 1...Bf7
        • 2.Sd7#
      • 1...Sg5
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • S(e);N_GUARD::QAR2(B),XP(f)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAR1(B)
      • Vars
        • S(j);N_GUARD,XQ(B)::R1(C),XR(h)
        • Q(a);N_GUARD::S(E)
        • B(l);N_GUARD::S(E),XP(i)
        • S(e);N_GUARD::QAR2(B),XP(f)
      • Refutation
        • B(l);
    • Try
      • R(C);CHECK,XR(h)
      • Vars
        • S(j);SBLOCK,XR(C)::B(A)
      • Refutation
        • K(g);P-FLIGHT,XR(C)
    • Try
      • Q(B);CHECK,XB(b)
      • Refutation
        • S(e);XQ(B)
  • Actual
    • S(E);XP(f)
    • Threat
      • QAR1(B)
    • Vars
      • S(e);CHECK,OGATE,XS(E)::QAR2(B),XS(e)
      • S(j);N_GUARD,XQ(B)::R1(C),XS(e)
      • Q(a);N_GUARD::S(E),XP(c)
      • B(l);N_GUARD::S(E),XB(l)
      • B(l);N_GUARD::S(E)
      • S(e);N_GUARD::QAB(B),XB(b)
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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).