MESON Chess Problem Database

Problem Display
PID: 211389 (rb1QK3/rp2p3/1N2P3/2PNkP2/3p1R2/3Bn1P1/8/8 w - - 0 1)

Hjelle, David

Land og Folk, 1971

rb1QK3/rp2p3/1N2P3/2PNkP2/3p1R2/3Bn1P1/8/8

#2

10 + 8

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Sc4#
    • 1...Sf1
      • 2.Sc4#
    • 1...Sc2
      • 2.Sc4#
    • 1...Sg2
      • 2.Sc4#
    • 1...Sc4
      • 2.Sxc4#
    • 1...Sg4
      • 2.Sc4#
    • 1...Sxd5
      • 2.Sd7#
    • 1...Sxf5
      • 2.Re4#
  • Tries
    • 1.Kf7?
      • threat
        • 2.Qh8#
      • 1...Sxd5
        • 2.Sc4#
        • 2.Sd7#
        • 2.Qxd5#
      • 1...Sxf5
        • 2.Sc4#
        • 2.Re4#
        • 2.Rxf5#
      • 1...Bc7
        • 2.Qxc7#
      • 1...Sg4
        • 2.Sc4#
      • 1...Bd6!
    • 1.Sxe3?
      • threat
        • 2.Sg4#
        • 2.Sd7#
        • 2.Qxd4#
      • 1...dxe3
        • 2.Qd4#
      • 1...Bd6
        • 2.Sg4#
        • 2.Sd7#
      • 1...Ra4
        • 2.Sg4#
        • 2.Sd7#
      • 1...Bc7
        • 2.Sg4#
        • 2.Sd7#
      • 1...Kf6!
    • 1.Bc4?
      • threat
        • 2.Sd7#
      • 1...Sxc4
        • 2.Sxc4#
      • 1...Sxf5!
    • 1.g4?
      • threat
        • 2.Re4#
      • 1...Sxg4
        • 2.Sc4#
      • 1...Sxd5!
  • Keys
    • 1.Kxe7!
      • threat
        • 2.Qh8#
      • 1...Bd6+
        • 2.Qxd6#
      • 1...Sxd5+
        • 2.Qxd5#
      • 1...Sxf5+
        • 2.Rxf5#
      • 1...Bc7
        • 2.Qxc7#
      • 1...Sg4
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • S(a);N_GUARD::S(G)
    • S(a);N_GUARD::S(G),XS(a)
    • S(a);SBLOCK,XS(E)::S(G)
    • S(a);SBLOCK,XP(F)::R1(C)
  • Tries
    • Try
      • K(J);S_FLIGHT
      • Threat
        • QAB(I)
      • Vars
        • B(h);N_GUARD::QAB(I),XB(h)
        • S(a);N_GUARD::S(G)
      • Refutation
        • B(h);
    • Try
      • S(E);XS(a)
      • Threat
        • DUALS(3)
      • Vars
        • P(b);XS(E)::QAB1(I)
      • Refutation
        • K(c);P_SPINP(f),S_FLIGHT
    • Try
      • B(A);
      • Threat
        • S(G)
      • Vars
        • S(a);XB(A)::S(G),XS(a)
      • Refutation
        • S(a);XP(F)
    • Try
      • P(B);
      • Threat
        • R1(C)
      • Vars
        • S(a);N_GUARD,XP(B)::S(G)
      • Refutation
        • S(a);XS(E)
  • Actual
    • K(J);P-FLIGHT,XP(f)
    • Threat
      • QAB(I)
    • Vars
      • B(h);CHECK,N_GUARD::QAB1(I),XB(h)
      • S(a);CHECK,OGATE,XS(E)::QAR1(I),XS(a)
      • S(a);CHECK,OGATE,XP(F)::R1(C),XS(a)
      • B(h);N_GUARD::QAB(I),XB(h)
      • S(a);N_GUARD::S(G)
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).