MESON Chess Problem Database

Problem Display
PID: 185360 (n1Q3B1/r2R4/P1N1pBN1/K2bRr2/1Pk1p3/6nq/1PP1p2b/8 w - - 0 1)

Lepage, Roger

3rd Comm., diagrammes 01. Beginners' Ty., 1974

n1Q3B1/r2R4/P1N1pBN1/K2bRr2/1Pk1p3/6nq/1PP1p2b/8

#2

12 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe5
      • 2.Sgxe5#
    • 1...Rxa6+
      • 2.Qxa6#
    • 1...Bxc6
      • 2.Bxe6#
      • 2.Qxc6#
  • Tries
    • 1.Sxa7+?
      • 1...Kd4
        • 2.Qc3#
        • 2.Qc5#
      • 1...Bc6
        • 2.Bxe6#
        • 2.Qxc6#
      • 1...Sc7!
    • 1.Rxe4+?
      • 1...Bxe4+
        • 2.Sce5#
      • 1...Sxe4!
  • Keys
    • 1.Rxe6!
      • threat
        • 2.b3#
      • 1...Rxa6+
        • 2.Qxa6#
      • 1...Bxc6+
        • 2.Re5#
      • 1...Bxe6+
        • 2.Sce5#
      • 1...Rxf6
        • 2.Sge5#
      • 1...Rf3
        • 2.Sge5#
      • 1...Re5
        • 2.Sgxe5#
      • 1...Sf1
        • 2.Rxe4#
      • 1...Sh1
        • 2.Rxe4#
      • 1...Sh5
        • 2.Rxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • R(h);XR(E)::S(I),XR(h)
    • R(j);CHECK,OGATE,XP(F)::QAB(K),XR(j)
  • Tries
    • Try
      • S(G);CHECK,N_SPINP(F),XR(j)
      • Refutation
        • S(k);P_SPINS(k)
    • Try
      • R(E);CHECK,XP(f)
      • Vars
        • B(g);CHECK,P_SPINP(i),XR(E)::QAR(K)+S(G),DCHECK
      • Refutation
        • S(c);XR(E)
  • Actual
    • R(E);XP(i)
    • Threat
      • P(A)
    • Vars
      • R(j);CHECK,OGATE,XP(F)::QAB(K),XR(j)
      • B(g);CHECK,OGATEB,P_SPINB(g),XS(G)::B(L)+R(E)
      • B(g);CHECK,P_SPINB(g),XR(E)::QAR(K)+S(G),DCHECK
      • R(h);N_GUARD,XB(H)::S(I)
      • R(h);N_GUARD::S(I)
      • R(h);N_GUARD::S(I),XR(h)
      • S(c);N_GUARD::R(E),XP(f)
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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).