MESON Chess Problem Database

Problem Display
PID: 103530 (4R3/3r2p1/6Q1/R2p4/3kNp2/KP1n2p1/P2PP3/2r1B1n1 w - - 0 1)

Driancourt, R

Canadian Chess Chat, 1980

4R3/3r2p1/6Q1/R2p4/3kNp2/KP1n2p1/P2PP3/2r1B1n1

#2

10 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...f3
      • 2.e3#
    • 1...dxe4
      • 2.Rxe4#
      • 2.Qxe4#
  • Tries
    • 1.Sxg3?
      • threat
        • 2.Sf5#
        • 2.Qxd3#
      • 1...Sxe2
        • 2.Sxe2#
        • 2.Sf5#
      • 1...Sxe1
        • 2.Sf5#
      • 1...fxg3
        • 2.Qxd3#
        • 2.e3#
      • 1...Rc3
        • 2.Sf5#
        • 2.dxc3#
      • 1...Rf7
        • 2.Qxd3#
      • 1...Sb2
        • 2.Sf5#
        • 2.Bf2#
      • 1...Sf2
        • 2.Sf5#
        • 2.Bxf2#
      • 1...Sb4
        • 2.Sf5#
        • 2.Bf2#
      • 1...Sc5
        • 2.Sf5#
        • 2.Bf2#
      • 1...Se5
        • 2.Bf2#
      • 1...Re7!
    • 1.Qf6+?
      • 1...Se5
        • 2.Qxe5#
      • 1...gxf6!
    • 1.Qxg7+?
      • 1...Se5
        • 2.Qxe5#
      • 1...Rxg7!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Qxd3#
      • 1...Rxc3
        • 2.dxc3#
      • 1...Sxe2
        • 2.Sxe2#
      • 1...Sxe1
        • 2.Qb6#
      • 1...Re7
        • 2.Rxd5#
      • 1...Sb2
        • 2.Qb6#
      • 1...Sf2
        • 2.Qb6#
      • 1...Sb4
        • 2.Qb6#
      • 1...Sc5
        • 2.Sb5#
      • 1...Se5
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • P(f);N_GUARD::P(D)
  • Tries
    • Try
      • S(G);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • S(c);XB(A)::S(G)
        • R(h);::QAR1(I),XS(c)
        • S(c);N_GUARD::B(A)
      • Refutation
        • R(h);
    • Try
      • Q(I);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB1(I),XS(c)
      • Refutation
        • P(i);XQ(I)
    • Try
      • Q(I);CHECK,XP(i)
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB1(I),XS(c)
      • Refutation
        • R(h);XQ(I)
  • Actual
    • S(G);
    • Threat
      • QAR1(I),XS(c)
    • Vars
      • R(a);OGATE,P_PINP(F),XS(G)::P(C),XR(a)
      • S(b);XP(D)::S(G),XS(b)
      • S(c);N_GUARD,XB(A)::QAB(I)
      • R(h);N_GUARD::R1(H),XP(g)
      • S(c);N_GUARD::QAB(I)
      • S(c);SBLOCK::S(G)
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).