MESON Chess Problem Database

Problem Display
PID: 263276 (n1n3B1/PP2pQ2/1b1kPP2/1Pqp4/1p1p3K/3N4/8/2R5 w - - 0 1)

van Dijk, Johannes

Szachy, 1951

n1n3B1/PP2pQ2/1b1kPP2/1Pqp4/1p1p3K/3N4/8/2R5

#2

10 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb5
      • 2.bxc8S#
    • 1...Qc6
      • 2.Rxc6#
    • 1...Bc7
      • 2.bxc8S#
    • 1...Sc7
      • 2.bxc8S#
    • 1...Sxa7
      • 2.Qxe7#
    • 1...exf6
      • 2.Qd7#
  • Tries
    • 1.Rxc5?
      • threat
        • 2.Rc6#
        • 2.bxc8S#
      • 1...Sxa7
        • 2.Qxe7#
      • 1...Bxc5!
    • 1.Qe8?
      • threat
        • 2.Qd7#
      • 1...Kc7
        • 2.Qd7#
        • 2.b8Q#
      • 1...Qxb5
        • 2.bxc8S#
      • 1...Qc6
        • 2.Rxc6#
        • 2.Qxc6#
      • 1...Qc7!
    • 1.bxc8Q?
      • threat
        • 2.Qd7#
        • 2.Qxe7#
      • 1...Qxb5
        • 2.Qxe7#
      • 1...Qxc8
        • 2.Qxe7#
      • 1...exf6
        • 2.Qcd7#
        • 2.Qfd7#
        • 2.Qff8#
        • 2.Qcf8#
      • 1...Qc6
        • 2.Rxc6#
        • 2.Qxe7#
        • 2.Qxc6#
      • 1...Bd8
        • 2.Qd7#
        • 2.Qxc5#
        • 2.Qxd8#
      • 1...Qc7!
    • 1.bxc8S+?
      • 1...Qxc8
        • 2.Qxe7#
      • 1...Kc7!
  • Keys
    • 1.fxe7!
      • threat
        • 2.e8S#
      • 1...Kc7
        • 2.b8Q#
      • 1...Qxb5
        • 2.bxc8S#
      • 1...Sxe7
        • 2.Qf4#
      • 1...Qc6
        • 2.Rxc6#
      • 1...Bd8
        • 2.exd8Q#
        • 2.exd8R#
      • 1...Sc7
        • 2.bxc8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(c);N_GUARD,XP(D)::PXS(i)=S
    • Q(c);OGATE::R1(A),XQ(c)
    • B(e);SBLOCK,S_CUTQ(c)::PXS(i)=S
    • S(h);SBLOCK,S_CUTQ(c)::PXS(i)=S
    • S(i);N_GUARD,XP(G)::QAB1(I),XP(g)
    • P(g);OGATE,XP(F)::QAR1(I)
  • Tries
    • Try
      • R(A);XQ(c)
      • Threat
        • DUALS(2)
      • Vars
        • S(i);N_GUARD,XP(G)::QAB1(I),XP(g)
      • Refutation
        • B(e);XR(A)
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • Q(c);N_GUARD,XP(D)::PXS(i)=S
      • Refutation
        • Q(c);
    • Try
      • P(H);XS(i)
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);XP(D)::QAB1(I),XP(g)
        • Q(c);XQ(H)::QAB1(I),XP(g)
      • Refutation
        • Q(c);
    • Try
      • P(H);CHECK,XS(i)
      • Vars
        • Q(c);XS(H)::QAB1(I),XP(g)
      • Refutation
        • K(f);P_SPINP(g),P_SPINQ(c),S_FLIGHT
  • Actual
    • P(F);XP(g)
    • Threat
      • P=S
    • Vars
      • K(f);P_SPINQ(c),S_CUTB(e),S_CUTS(h),S_FLIGHT::P=Q
      • Q(c);N_GUARD,XP(D)::PXS(i)=S
      • S(i);SBLOCK,XP(F)::QAB(I)
      • Q(c);OGATE::R1(A),XQ(c)
      • B(e);OGATE,P_PINP(F)::PXB(e)=Q
      • S(h);SBLOCK,S_CUTQ(c)::PXS(i)=S
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).