MESON Chess Problem Database

Problem Display
PID: 197166 (3bR2Q/3p2pq/1p2n1rP/1Ppk1NnN/4rP2/1P1K3p/6B1/6B1 w - - 0 1)

Coppens, JP

Haagsche Post, 1917

3bR2Q/3p2pq/1p2n1rP/1Ppk1NnN/4rP2/1P1K3p/6B1/6B1

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Sf7
      • 2.Bxe4#
    • 1...Sd4
      • 2.Re5#
    • 1...Sxf4+
      • 2.Sxf4#
    • 1...Sc7
      • 2.Re5#
    • 1...Sf8
      • 2.Re5#
    • 1...c4+
      • 2.bxc4#
    • 1...d6
      • 2.Se3#
    • 1...gxh6
      • 2.Qe5#
  • Tries
    • 1.Qf8?
      • threat
        • 2.Se3#
        • 2.Qd6#
      • 1...Sxf4+
        • 2.Sxf4#
      • 1...c4+
        • 2.bxc4#
      • 1...Sxf8
        • 2.Re5#
      • 1...hxg2
        • 2.Qd6#
      • 1...Bc7
        • 2.Se3#
      • 1...Sf3
        • 2.Qd6#
      • 1...Sf7
        • 2.Se3#
        • 2.Bxe4#
      • 1...Sd4
        • 2.Se3#
        • 2.Re5#
      • 1...Sc7
        • 2.Se3#
        • 2.Re5#
      • 1...d6
        • 2.Se3#
        • 2.Qxd6#
      • 1...Be7!
  • Keys
    • 1.Re7!
      • threat
        • 2.Rxd7#
      • 1...Sxf4+
        • 2.Sxf4#
      • 1...c4+
        • 2.bxc4#
      • 1...Bxe7
        • 2.Qa8#
      • 1...gxh6
        • 2.Qe5#
      • 1...Bc7
        • 2.Qa8#
      • 1...Sf7
        • 2.Bxe4#
      • 1...Sd4
        • 2.Re5#
      • 1...Sc7
        • 2.Re5#
      • 1...Sf8
        • 2.Re5#
      • 1...d6
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD::B(B),XR(b)
    • S(g);OGATE::R1(J)
    • S(g);CHECK,XP(E)::S(H),XS(g)
    • P(c);CHECK,OGATE::P(C),XP(c)
    • P(i);SBLOCK::S(G)
    • P(j);OGATE,XP(I)::QAR1(K)
  • Tries
    • Try
      • Q(K);
      • Threat
        • DUALS(2)
      • Vars
        • S(g);CHECK,XP(E)::S(H),XS(g)
        • P(c);CHECK,OGATE::P(C),XP(c)
        • S(g);OGATE,XQ(K)::R1(J)
        • P(a);N_SPINR(b),XB(B)::QAR1(K)
        • B(l);::S(G)
        • S(e);N_SPINR(b)::QAR1(K)
      • Refutation
        • B(l);
  • Actual
    • R(J);
    • Threat
      • R(J),XP(i)
    • Vars
      • S(g);CHECK,XP(E)::S(H),XS(g)
      • P(c);CHECK,OGATE::P(C),XP(c)
      • B(l);OGATE,XR(J)::QAB(K)
      • P(j);OGATE,XP(I)::QAR1(K)
      • B(l);OGATE::QAB(K)
      • S(e);N_GUARD::B(B),XR(b)
      • S(g);OGATE::R1(J)
      • P(i);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).