MESON Chess Problem Database

Problem Display
PID: 193375 (bb6/p7/8/3P4/1p6/nN2p3/1RN1P1R1/3k2KQ w - - 0 1)

van Dijk, Johannes

De Maasbode, 1914

bb6/p7/8/3P4/1p6/nN2p3/1RN1P1R1/3k2KQ

#2

8 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bh2+
      • 2.Kxh2#
    • 1...Sxc2
      • 2.Rb1#
  • Tries
    • 1.Sxa3?
      • threat
        • 2.Rb1#
      • 1...Bh2+
        • 2.Kxh2#
      • 1...Ke1
        • 2.Rb1#
      • 1...bxa3!
    • 1.Qh4?
      • threat
        • 2.Sxe3#
        • 2.Qe1#
        • 2.Qd4#
      • 1...Sxc2
        • 2.Rb1#
      • 1...Bg3
        • 2.Qd4#
      • 1...Bf4
        • 2.Qe1#
      • 1...Be5
        • 2.Sxe3#
        • 2.Qe1#
      • 1...Sb1
        • 2.Sxe3#
        • 2.Qe1#
      • 1...Sc4
        • 2.Qe1#
      • 1...Sb5
        • 2.Sxe3#
        • 2.Qe1#
      • 1...Bh2+!
    • 1.Qh7?
      • threat
        • 2.Qd3#
      • 1...Sxc2
        • 2.Rb1#
      • 1...Sb1
        • 2.Rxb1#
      • 1...Sc4
        • 2.Rb1#
      • 1...Bh2+!
  • Keys
    • 1.Rf2!
      • threat
        • 2.Kg2#
      • 1...Bh2+
        • 2.Kxh2#
      • 1...exf2+
        • 2.Kxf2#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...Sxc2
        • 2.Rb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(g);CHECK::QAR(B)+K(A),XB(g)
    • S(b);N_GUARD,SBLOCK,XS(D)::R(C)
  • Tries
    • Try
      • S(D);XS(b)
      • Threat
        • R(C)
      • Vars
        • B(g);CHECK::QAR(B)+K(A),XB(g)
        • K(a);P-FLIGHT::R(C)
      • Refutation
        • P(d);XS(D)
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • S(b);N_GUARD,SBLOCK,XS(D)::R(C)
        • B(g);::QAR(B)
        • B(g);::QAR1(B)
        • S(b);::QAR1(B)
      • Refutation
        • B(g);CHECK
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • S(b);N_GUARD,XS(D)::R(C)
        • S(b);N_GUARD::R(C),XS(b)
        • S(b);N_GUARD::R(C)
      • Refutation
        • B(g);CHECK
  • Actual
    • R(F);
    • Threat
      • QAR(B)+K(A)
    • Vars
      • B(g);CHECK::QAR(B)+K(A),XB(g)
      • P(c);CHECK,XR(F)::QAR(B)+K(A),XP(c)
      • B(f);OGATE,XP(H)::QAR(B),XB(f)
      • S(b);N_GUARD,SBLOCK,XS(D)::R(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).