MESON Chess Problem Database

Problem Display
PID: 11816 (4R2B/2p4B/K2Q2r1/2R1rN1n/3Nkbp1/2P1p3/4P3/8 w - - 0 1)

Cheylan, Yves

2nd Comm., KeyStip 06. Ty., 1972

4R2B/2p4B/K2Q2r1/2R1rN1n/3Nkbp1/2P1p3/4P3/8

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ree6
      • 2.Qc6#
    • 1...Rg5
      • 2.Sg3#
      • 2.Qd5#
      • 2.Qc6#
    • 1...Rxd6+
      • 2.Sxd6#
    • 1...Rge6
      • 2.Sg3#
    • 1...Rf6
      • 2.Sg3#
    • 1...Rh6
      • 2.Sg3#
      • 2.Sxh6#
    • 1...Rg7
      • 2.Sg3#
      • 2.Sxg7#
      • 2.Qd5#
      • 2.Qc6#
    • 1...Rg8
      • 2.Sg3#
      • 2.Sg7#
      • 2.Qd5#
      • 2.Qc6#
    • 1...cxd6
      • 2.Sxd6#
  • Tries
    • 1.Sg3+?
      • 1...Sxg3
        • 2.Qc6#
      • 1...Bxg3!
  • Keys
    • 1.Se6!
      • threat
        • 2.Qd3#
      • 1...Kxf5
        • 2.Qd3#
      • 1...Rexe6
        • 2.Qc6#
      • 1...Rgxe6
        • 2.Sg3#
        • 2.Rc4#
      • 1...cxd6
        • 2.Sxd6#
      • 1...Rd5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(e);S_CUTR(g)::QAB(G)
    • R(g);CHECK,XQ(G)::B(H)+S(E),DCHECK,XR(g)
    • R(g);N_SPINR(e)::B(H)+S(E),DCHECK
    • R(g);::B(H)+S(E),DCHECK
    • P(h);XQ(G)::S(E),XP(h)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • S(f);XS(E)::QAB(G)
      • Refutation
        • B(c);XS(E)
  • Actual
    • S(C);N_PINR(e),N_SPINQ(G)
    • Threat
      • QAB1(G)
    • Vars
      • K(b);P_SPINR(e),S_FLIGHT,XS(E)::QAB(G)
      • R(e);N_GUARD,P_PINQ(G),P_SPINR(e),XS(C)::QAB(G)
      • P(h);XQ(G)::S(E),XP(h)
      • R(e);N_GUARD::QAB1(G),XR(e)
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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).