MESON Chess Problem Database

Problem Display
PID: 156479 (8/qp1r3b/3N3R/1P1kP1N1/p2ppP2/8/1b4Q1/1KR2BB1 w - - 0 1)

Handloser, Ralf Chris

The Problemist, 2014

8/qp1r3b/3N3R/1P1kP1N1/p2ppP2/8/1b4Q1/1KR2BB1

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd6
      • 2.Rxd6#
    • 1...Ba1
      • 2.Qa2#
    • 1...Ba3
      • 2.Qa2#
    • 1...Bg8
      • 2.Qxe4#
  • Tries
    • 1.Sgxe4?
      • threat
        • 2.Bc4#
      • 1...Bxe4+
        • 2.Qxe4#
      • 1...Qc5
        • 2.Rxc5#
      • 1...d3
        • 2.Sc3#
      • 1...Rc7!
    • 1.Se6?
      • threat
        • 2.Bc4#
      • 1...Qc5
        • 2.Rxc5#
      • 1...Rc7
        • 2.Sxc7#
      • 1...d3!
  • Keys
    • 1.Sdxe4!
      • threat
        • 2.Bc4#
      • 1...Bxe4+
        • 2.Qxe4#
      • 1...Bxc1
        • 2.Qa2#
      • 1...Qc5
        • 2.Rxc5#
      • 1...Rc7
        • 2.Rd6#
      • 1...Bc3
        • 2.Qa2#
      • 1...d3
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • R(h);OGATE,XS(J)::R1(K),XR(h)
    • B(a);OGATE::QAB(E)
    • B(i);N_GUARD::QAB1(E),XP(d)
  • Tries
    • Try
      • S(I);P_SPINS(I),XP(d)
      • Threat
        • B(C)
      • Vars
        • B(i);CHECK,OGATE,P_SPINB(i),XS(I)::QAB1(E),XB(i)
        • Q(f);N_GUARD::R1(B),XQ(f)
        • P(c);N_PINS(I)::QAB(E)+S(I),DCHECK
      • Refutation
        • R(h);
    • Try
      • S(I);
      • Threat
        • B(C)
      • Vars
        • Q(f);N_GUARD::R1(B),XQ(f)
        • R(h);N_GUARD::S(I),XR(h)
      • Refutation
        • P(c);
  • Actual
    • S(J);P_SPINS(J),XP(d)
    • Threat
      • B(C)
    • Vars
      • B(i);CHECK,OGATE,P_SPINB(i),XS(J)::QAB1(E),XB(i)
      • B(a);OGATE,XR(B)::QAB(E)
      • Q(f);N_GUARD::R1(B),XQ(f)
      • R(h);N_GUARD::R1(K)
      • B(a);OGATE::QAB(E)
      • P(c);N_PINS(J)::QAB(E)+S(J),DCHECK
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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).