MESON Chess Problem Database

Problem Display
PID: 261987 (8/1R3B2/p2kp3/3Pr2p/N1p2n1r/N2p3p/1Q2qBbK/1n6 w - - 0 1)

Hjelle, David

Problemnoter, 1956

8/1R3B2/p2kp3/3Pr2p/N1p2n1r/N2p3p/1Q2qBbK/1n6

#2

8 + 13

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...exd5
      • 2.Qb6#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Sxc4#
        • 2.Qc5#
      • 1...Qxf2
        • 2.Sxc4#
      • 1...Bxd5
        • 2.Qc5#
      • 1...Sxa3
        • 2.Qc5#
      • 1...Sxd5
        • 2.Qc5#
      • 1...exd5
        • 2.Qc5#
        • 2.Qb6#
      • 1...Qa2
        • 2.Qc5#
      • 1...Qc2
        • 2.Qc5#
      • 1...Qe3
        • 2.Sxc4#
      • 1...Re3
        • 2.Sxc4#
      • 1...Re4
        • 2.Sxc4#
      • 1...Rf5
        • 2.Sxc4#
      • 1...Rg5
        • 2.Sxc4#
      • 1...Sd2
        • 2.Qc5#
      • 1...d2
        • 2.Qc5#
      • 1...c3
        • 2.Sc4#
        • 2.Qc5#
      • 1...Rxd5!
  • Keys
    • 1.Be8!
      • threat
        • 2.Rd7#
      • 1...Kxd5
        • 2.Qd4#
      • 1...Rxd5
        • 2.Sxc4#
      • 1...Bxd5
        • 2.Qb4#
      • 1...Sxd5
        • 2.Bc5#
      • 1...exd5
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(m);XP(F)::QAR2(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);XB(B)::S(D),XP(f)
        • B(c);P_PINB(B),P_SPINB(c),XP(F)::QAB1(A)
        • S(a);XS(D)::QAB1(A)
        • S(g);P_SPINS(g),XP(F)::QAB1(A)
        • Q(b);::QAB1(A)
        • Q(b);::S(D),XP(f)
        • R(i);::S(D),XP(f)
        • S(a);::QAB1(A)
        • P(d);::QAB1(A)
      • Refutation
        • R(i);P_SPINR(i),XP(F)
  • Actual
    • B(H);
    • Threat
      • R1(G)
    • Vars
      • K(l);OGATEB,P-FLIGHT,XP(F)::QAR1(A)
      • R(i);SBLOCK,XP(F)::S(D),XP(f)
      • B(c);P_PINB(B),SBLOCK,XP(F)::QAB(A)
      • S(g);SBLOCK,XP(F)::B(B)
      • P(m);SBLOCK,XP(F)::QAR2(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).