MESON Chess Problem Database

Problem Display
PID: 78152 (8/2N3N1/4R1P1/2k1qR2/2p4r/2Qn4/3P1PnB/K6B w - - 0 1)

Marceil, Andre

3rd Prize, Bulletin de la FFE, 1928

8/2N3N1/4R1P1/2k1qR2/2p4r/2Qn4/3P1PnB/K6B

#2

11 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Rxd5#
    • 1...Rd4
      • 2.Qa5#
    • 1...Sge1
      • 2.Rc6#
    • 1...Se3
      • 2.Rc6#
    • 1...Sgf4
      • 2.Rc6#
    • 1...Sc1
      • 2.Rfxe5#
    • 1...Sde1
      • 2.Rfxe5#
    • 1...Sb2
      • 2.Rfxe5#
    • 1...Sxf2
      • 2.Rfxe5#
    • 1...Sdf4
      • 2.d4#
  • Tries
    • 1.Bxe5?
      • threat
        • 2.Bd4#
        • 2.Qa5#
      • 1...Sxe5
        • 2.Rfxe5#
      • 1...Rd4
        • 2.Bxd4#
        • 2.Qa5#
      • 1...Sb4
        • 2.Bd4#
      • 1...Rxh1+!
  • Keys
    • 1.Ra6!
      • threat
        • 2.Sge6#
      • 1...Qxf5
        • 2.Bd6#
      • 1...Sgf4
        • 2.Rc6#
      • 1...Sdf4
        • 2.d4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • Q(f);N_PINQ(F),OGATE::R1(G),XQ(f)
    • R(d);N_PINQ(F),SBLOCK::QAR2(F)
    • S(a);::R1(H)
    • S(b);N_GUARD::R(G),XQ(f)
    • S(b);N_GUARD,N_PINQ(F)::R(G),XQ(f)
    • S(b);N_GUARD,XP(D)::R(G),XQ(f)
    • S(b);OGATE::P(C)
  • Tries
    • Try
      • B(E);N_SPINQ(F),XQ(f)
      • Threat
        • DUALS(2)
      • Vars
        • S(b);OGATE,P_SPINS(b),XB(E)::R(G),XS(b)
        • S(b);::R(G)+B(E),DCHECK
      • Refutation
        • R(d);CHECK,XB(B)
  • Actual
    • R(H);
    • Threat
      • S(K)
    • Vars
      • Q(f);N_PINQ(F),N_SPINQ(f),OGATE,XR(G)::B(E)
      • S(a);::R1(H)
      • S(b);OGATE::P(C)
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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).