MESON Chess Problem Database

Problem Display
PID: 270166 (8/3b1pK1/2NBp1p1/2R3n1/2p1k1rp/2P1p1p1/4Q3/2b5 w - - 0 1)

Shire, David J

Probleemblad, 2020

8/3b1pK1/2NBp1p1/2R3n1/2p1k1rp/2P1p1p1/4Q3/2b5

#2

6 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Re5#
    • 1...Sf3
      • 2.Qc2#
  • Tries
    • 1.Sb4?
      • threat
        • 2.Qxg4#
      • 1...Rf4
        • 2.Re5#
      • 1...Sf3
        • 2.Qc2#
      • 1...Sh3
        • 2.Qg2#
      • 1...f5
        • 2.Rxc4#
      • 1...e5!
    • 1.Se7?
      • threat
        • 2.Rxc4#
      • 1...Sf3
        • 2.Qc2#
      • 1...Bb5!
    • 1.Rxc4+?
      • 1...Kf5
        • 2.Se7#
        • 2.Qxg4#
      • 1...Kd5!
    • 1.Qg2+?
      • 1...Sf3
        • 2.Qc2#
      • 1...Kd3!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qxg4#
      • 1...Kf4
        • 2.Qxg4#
      • 1...Kf5
        • 2.Qxg4#
      • 1...Rf4
        • 2.Qc2#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sh3
        • 2.Qf3#
      • 1...f5
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(f);SBLOCK::R1(C)
    • S(h);SBLOCK::QAB(A)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR2(A),XR(f)
      • Vars
        • R(f);SBLOCK::R1(C)
        • S(h);SBLOCK::QAB(A)
        • S(h);N_GUARD::QAB(A)
        • P(l);SBLOCK::R(C),XP(d)
      • Refutation
        • P(i);
    • Try
      • S(D);
      • Threat
        • R(C),XP(d)
      • Vars
        • S(h);SBLOCK::QAB(A)
      • Refutation
        • B(k);
    • Try
      • R(C);CHECK,XP(d)
      • Refutation
        • K(e);N_SPINP(b),S_FLIGHT
    • Try
      • Q(A);CHECK,N_PINP(b)
      • Vars
        • S(h);P_SPINS(h),SBLOCK::QAB(A)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • S(D);
    • Threat
      • QAR2(A),XR(f)
    • Vars
      • K(e);N_SPINP(b),P-FLIGHT::QAR1(A),XR(f)
      • K(e);N_SPINP(b),S_FLIGHT::QAB1(A),XR(f)
      • R(f);SBLOCK::QAB(A)
      • S(h);N_GUARD::QAB1(A),XS(h)
      • S(h);N_GUARD::QAB1(A)
      • P(l);SBLOCK::QAR2(A),XP(d)
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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).