MESON Chess Problem Database

Problem Display
PID: 149124 (6b1/3n2p1/B1R1n1P1/pr1p1K2/qb1p2p1/1P1k4/2N1R3/4B1NQ w - - 0 1)

Beugelsdijk, Ruud R A

Wissmann, Dolf

Friesch Dagblad, 2001

6b1/3n2p1/B1R1n1P1/pr1p1K2/qb1p2p1/1P1k4/2N1R3/4B1NQ

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Bxb5#
    • 1...Qa2
      • 2.Bxb5#
    • 1...Qa3
      • 2.Bxb5#
    • 1...Bxe1
      • 2.Sxe1#
    • 1...Bd2
      • 2.Rxd2#
    • 1...Ba3
      • 2.Rd2#
    • 1...Bd6
      • 2.Rd2#
    • 1...Be7
      • 2.Rd2#
    • 1...Bf8
      • 2.Rd2#
    • 1...g3
      • 2.Qf3#
  • Tries
    • 1.Bd2?
      • threat
        • 2.Se1#
      • 1...Qa1
        • 2.Bxb5#
      • 1...Bxd2!
    • 1.Bxb4?
      • threat
        • 2.Se1#
        • 2.Rd2#
      • 1...axb4
        • 2.Se1#
      • 1...Qa1
        • 2.Bxb5#
        • 2.Rd2#
      • 1...Qxb4!
    • 1.Qh3+?
      • 1...g3
        • 2.Qxg3#
      • 1...gxh3!
  • Keys
    • 1.Qxd5!
      • threat
        • 2.Re3#
      • 1...Bxe1
        • 2.Sxe1#
      • 1...Bc3
        • 2.Rxc3#
      • 1...Bd2
        • 2.Rxd2#
      • 1...Bc5
        • 2.Qe4#
      • 1...Sec5
        • 2.Qxd4#
      • 1...Sdc5
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • Q(b);N_GUARD::B(H),XR(g)
    • B(c);XB(A)::S(D),XB(c)
    • B(c);N_GUARD::R1(E),XB(c)
    • B(c);N_GUARD::R1(E)
    • P(e);N_GUARD::QAR2(C)
  • Tries
    • Try
      • B(A);
      • Threat
        • S(D)
      • Vars
        • Q(b);N_GUARD::B(H),XR(g)
      • Refutation
        • B(c);XB(A)
    • Try
      • B(A);XB(c)
      • Threat
        • DUALS(2)
      • Vars
        • P(f);XB(A)::S(D)
      • Refutation
        • Q(b);XB(A)
    • Try
      • Q(C);CHECK
      • Vars
        • P(e);P_SPINP(e)::QAR(C),XP(e)
      • Refutation
        • P(e);XQ(C)
  • Actual
    • Q(C);P_PINP(d),P_SPINQ(C),XP(h)
    • Threat
      • R1(E)
    • Vars
      • B(c);XB(A)::S(D),XB(c)
      • B(c);N_GUARD::R1(I),XB(c)
      • B(c);N_GUARD::R1(E),XB(c)
      • B(c);N_PINQ(C)::QAB1(C)
      • S(i);N_PINQ(C)::QAR1(C),XP(d)
      • S(j);N_PINQ(C)::QAB1(C)
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).