MESON Chess Problem Database

Problem Display
PID: 246397 (2r3b1/3Rp2p/2n5/B2p4/N7/1B1kpQ2/1bnr3p/5N1K w - - 0 1)

Hjelle, David

Sjakk-Nytt, 1947

2r3b1/3Rp2p/2n5/B2p4/N7/1B1kpQ2/1bnr3p/5N1K

#2

7 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Qxe3#
    • 1...Se1
      • 2.Qxe3#
    • 1...Sa3
      • 2.Qxe3#
    • 1...S2b4
      • 2.Qxe3#
    • 1...S2d4
      • 2.Sc5#
      • 2.Qxe3#
    • 1...S6d4
      • 2.Sxb2#
    • 1...d4
      • 2.Sxb2#
      • 2.Sc5#
  • Tries
    • 1.Bc4+?
      • 1...Kd4
        • 2.Qf4#
      • 1...Kxc4!
    • 1.Rxd5+?
      • 1...Bd4
        • 2.Sb2#
        • 2.Sc5#
      • 1...S2d4
        • 2.Sc5#
        • 2.Qxe3#
      • 1...S6d4
        • 2.Sxb2#
      • 1...Bxd5!
    • 1.Qf5+?
      • 1...Kd4
        • 2.Bb6#
      • 1...Ke2!
  • Keys
    • 1.Sg3!
      • threat
        • 2.Qe4#
      • 1...Rd1+
        • 2.Qxd1#
      • 1...Kd4
        • 2.Qe4#
      • 1...Bd4
        • 2.Qf5#
      • 1...S2d4
        • 2.Sc5#
      • 1...S6d4
        • 2.Sxb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • S(b);N_GUARD::QAR1(D),XP(f)
    • S(h);SBLOCK::S(E),XB(a)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(e);N_SPINP(f),P-FLIGHT,P_SPINP(g)::QAR2(D)
      • Refutation
        • K(e);N_SPINP(f),S_FLIGHT,XB(C)
    • Try
      • R(G);CHECK,XP(g)
      • Vars
        • S(h);P_SPINS(h)::S(E),XB(a)
      • Refutation
        • B(l);P_PINQ(D),XR(G)
    • Try
      • Q(D);CHECK,N_PINP(f),P_PINP(g)
      • Vars
        • K(e);P-FLIGHT::B(F)
      • Refutation
        • K(e);N_SPINP(g),S_FLIGHT
  • Actual
    • S(A);
    • Threat
      • QAB1(D)
    • Vars
      • R(c);CHECK,OGATEB::QAR2(D),XR(c)
      • K(e);N_SPINP(f),P-FLIGHT,P_SPINP(g)::QAR1(D)
      • B(a);SBLOCK::QAB(D)
      • S(b);SBLOCK::S(E)
      • S(h);SBLOCK::S(E),XB(a)
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).