MESON Chess Problem Database

Problem Display
PID: 241383 (B1K5/p3p1p1/8/1R1PkNpN/2R3P1/2P1rn2/2P3Qb/B7 w - - 0 1)

Hjelle, David

Norsk Sjakkblad, 1937

B1K5/p3p1p1/8/1R1PkNpN/2R3P1/2P1rn2/2P3Qb/B7

#2

12 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Re2
      • 2.Qxe2#
    • 1...Rxc3
      • 2.Qe2#
    • 1...Bg1
      • 2.Qg3#
    • 1...Bg3
      • 2.Qxg3#
    • 1...Sd4
      • 2.cxd4#
    • 1...e6
      • 2.d6#
  • Tries
    • 1.Sh6?
      • threat
        • 2.Sf7#
      • 1...Kd6
        • 2.Sf7#
      • 1...gxh6!
    • 1.Re4+?
      • 1...Kxe4
        • 2.d6#
      • 1...Rxe4!
    • 1.Rc6?
      • threat
        • 2.Re6#
      • 1...Rxc3
        • 2.Qe2#
      • 1...Sd4
        • 2.cxd4#
      • 1...e6
        • 2.Rxe6#
      • 1...Ke4!
    • 1.Rb6?
      • threat
        • 2.Re6#
      • 1...Sd4
        • 2.cxd4#
      • 1...e6
        • 2.Rxe6#
      • 1...axb6!
  • Keys
    • 1.Rc7!
      • threat
        • 2.Rxe7#
      • 1...Ke4
        • 2.d6#
      • 1...Rxc3
        • 2.Qe2#
      • 1...Sd4
        • 2.cxd4#
      • 1...e6
        • 2.d6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(b);OGATEB::QAR(C),XR(b)
    • R(b);OGATEB,P_PINR(E),P_SPINR(b),XP(D)::QAR(C)
    • B(a);N_GUARD::QAB(C)
    • B(a);N_GUARD::QAB(C),XB(a)
    • S(c);OGATE::P(D),XS(c)
    • P(g);SBLOCK::R(G)+P(H)
  • Tries
    • Try
      • S(I);
      • Threat
        • S(I)
      • Vars
        • K(d);S_FLIGHT::S(I)
      • Refutation
        • P(h);XS(I)
    • Try
      • R(E);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINS(c),XR(E)::B(K)+P(H)
      • Refutation
        • R(b);XR(E)
    • Try
      • R(E);
      • Threat
        • R1(E)
      • Vars
        • R(b);OGATEB,P_PINR(E),P_SPINR(b),XP(D)::QAR(C)
        • S(c);OGATE::P(D),XS(c)
        • P(g);::R1(E),XP(g)
      • Refutation
        • K(d);P-FLIGHT,P_SPINS(c)
    • Try
      • R(G);
      • Threat
        • R1(G)
      • Vars
        • S(c);OGATE::P(D),XS(c)
        • P(g);::R1(G),XP(g)
      • Refutation
        • P(f);XR(G)
  • Actual
    • R(E);
    • Threat
      • R(E),XP(g)
    • Vars
      • K(d);P-FLIGHT,P_SPINS(c)::B(K)+P(H)
      • R(b);OGATEB,P_PINR(E),P_SPINR(b),XP(D)::QAR(C)
      • S(c);OGATE::P(D),XS(c)
      • P(g);SBLOCK::R(G)+P(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).