MESON Chess Problem Database

Problem Display
PID: 116326 (BB1K4/3P2pN/4P3/3R1nR1/2NPk2q/Q2p1ppp/8/4rn2 w - - 0 1)

Hartong, Jan

Sahovski Vestnik, 1950

BB1K4/3P2pN/4P3/3R1nR1/2NPk2q/Q2p1ppp/8/4rn2

#2

11 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg5+
      • 2.Sxg5#
    • 1...Qf4
      • 2.Rd6#
    • 1...Qg4
      • 2.Rxg4#
    • 1...Qxh7
      • 2.Rg4#
    • 1...S1e3
      • 2.Sd2#
    • 1...g6
      • 2.Sf6#
  • Tries
    • 1.Be5?
      • threat
        • 2.Ra5#
        • 2.Rb5#
        • 2.Rc5#
        • 2.Rd6#
      • 1...Qxg5+
        • 2.Sxg5#
      • 1...Sxd4
        • 2.Rxd4#
      • 1...Rb1
        • 2.Rb5#
      • 1...S1e3
        • 2.Sd2#
      • 1...S5e3
        • 2.Sd6#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Se7!
    • 1.Re5+?
      • 1...Kf4
        • 2.Re4#
        • 2.Rxf5#
      • 1...Kxd4!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Qxf5#
      • 1...Qxg5+
        • 2.Sxg5#
      • 1...Qxh7
        • 2.Rg4#
      • 1...Sxd4
        • 2.Re5#
      • 1...Qf4
        • 2.Rd6#
      • 1...Qg4
        • 2.Rxg4#
      • 1...S1e3
        • 2.Sd2#
      • 1...S5e3
        • 2.Sd6#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Sh6
        • 2.Rd6#
      • 1...Se7
        • 2.Rge5#
      • 1...g6
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(h);CHECK,XR(E)::S(H),XQ(h)
    • Q(h);N_PINR(E),SBLOCK::B(I)+R(D)
    • Q(h);N_PINR(E)::R(E),XQ(h)
    • Q(h);N_PINR(E),XS(H)::R(E)
    • S(b);N_GUARD,SBLOCK::S(B)
    • P(j);N_GUARD::S(H)
  • Tries
    • Try
      • B(J);
      • Threat
        • DUALS(4)
      • Vars
        • Q(h);CHECK,XR(E)::S(H),XQ(h)
        • S(i);OGATE,XP(C)::B(I)+R(D),DCHECK,XS(i)
        • R(a);::B(I)+R(D)
        • S(b);N_GUARD,SBLOCK::S(B)
        • S(i);N_GUARD,SBLOCK::S(B)
        • S(i);::B(I)+R(D),XS(i)
      • Refutation
        • S(i);N_PINR(E)
    • Try
      • R(D);CHECK
      • Refutation
        • K(g);P-FLIGHT,XP(C)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A),XS(i)
    • Vars
      • Q(h);CHECK,XR(E)::S(H),XQ(h)
      • Q(h);N_PINR(E),XS(H)::R(E)
      • S(i);SBLOCK,XP(C)::B(I)+R(D),DCHECK
      • Q(h);N_PINR(E),SBLOCK::B(I)+R(D)
      • Q(h);N_PINR(E)::R(E),XQ(h)
      • S(b);N_GUARD,SBLOCK::S(B)
      • S(i);N_GUARD,SBLOCK::S(B)
      • S(i);::B(I)+R(D),XS(i)
      • S(i);::B(I)+R(D)
      • S(i);N_PINR(E)::R1(E)
      • P(j);N_GUARD::S(H)
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).