MESON Chess Problem Database

Problem Display
PID: 96511 (3Q4/4p3/b5K1/n4N2/r2n4/1P6/1N1k4/2R1R3 w - - 0 1)

Lepage, Roger

Problemas, 1973

3Q4/4p3/b5K1/n4N2/r2n4/1P6/1N1k4/2R1R3

#2

7 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.Qxd4#
    • 1...e5
      • 2.Qg5#
    • 1...e6
      • 2.Qg5#
  • Tries
    • 1.Qxa5+?
      • 1...Rb4
        • 2.Qxb4#
      • 1...Rxa5!
    • 1.Qxd4+?
      • 1...Bd3
        • 2.Qc3#
        • 2.Qe3#
        • 2.Qxd3#
      • 1...Rxd4!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qh6#
      • 1...Sdxb3
        • 2.Qc3#
      • 1...Sxf5
        • 2.Qc3#
      • 1...Sc2
        • 2.Rcd1#
      • 1...Se2
        • 2.Red1#
      • 1...Sf3
        • 2.Qc3#
      • 1...Sb5
        • 2.Qh2#
      • 1...Sdc6
        • 2.Qc3#
      • 1...Se6
        • 2.Qc3#
      • 1...Sc4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 2
  • Sets
    • S(d);S_CUTB(e),S_CUTR(b)::QAR2(G),XS(c)
    • P(f);OGATE::QAB(G)
  • Tries
    • Try
      • Q(G);CHECK,N_PINS(c),XS(d)
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB(G),XR(b)
      • Refutation
        • R(b);XQ(G)
    • Try
      • Q(G);CHECK,XS(c)
      • Refutation
        • R(b);XQ(G)
  • Actual
    • Q(G);N_PINS(c)
    • Threat
      • QAB(G)
    • Vars
      • S(c);OGATE,XP(D)::QAB1(G)
      • S(c);OGATE,XS(E)::QAB1(G)
      • S(c);SBLOCK::R1(A)
      • S(c);SBLOCK::R1(B)
      • S(c);OGATE::QAB1(G)
      • S(c);N_GUARD,S_CUTB(e)::QAR(G)
      • S(d);S_CUTB(e),S_CUTR(b)::QAR2(G),XS(c)
HTML5 logo

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).