MESON Chess Problem Database

Problem Display
PID: 277010 (1n3r2/pNR4B/4P1b1/r1Nk4/p7/2RpQp2/1p1P4/1K6 w - - 0 1)

Hjelle, David

To Mat, 1957

1n3r2/pNR4B/4P1b1/r1Nk4/p7/2RpQp2/1p1P4/1K6

#2

9 + 10

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5
      • 2.R3xc5#
      • 2.R7xc5#
    • 1...Rf5
      • 2.Qe4#
    • 1...Be4
      • 2.Qxe4#
    • 1...Bh5
      • 2.Qe4#
    • 1...Bf7
      • 2.Qe4#
    • 1...Be8
      • 2.Qe4#
    • 1...Sc6
      • 2.Rd7#
  • Tries
    • 1.Sd7?
      • threat
        • 2.Qe5#
      • 1...Sxd7
        • 2.Rxd7#
      • 1...Be4
        • 2.Qxe4#
      • 1...Rf5
        • 2.Rxd3#
      • 1...Sc6!
  • Keys
    • 1.Sxd3!
      • threat
        • 2.Qe5#
      • 1...Bxd3+
        • 2.Rxd3#
      • 1...Be4
        • 2.Qxe4#
      • 1...Rf5
        • 2.Sb4#
      • 1...Sc6
        • 2.Rd7#
      • 1...Sd7
        • 2.Rxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(j);S_CUTB(g)::QAB1(D)
    • B(g);N_GUARD::QAB1(D),XB(g)
    • B(g);N_GUARD::QAB1(D)
    • S(i);N_GUARD,SBLOCK::R(H)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAR1(D)
      • Vars
        • S(i);OGATE,XS(E)::R(H),XS(i)
        • B(g);N_GUARD::QAB1(D),XB(g)
        • R(j);S_CUTB(g)::R(C),XP(b)
      • Refutation
        • S(i);
  • Actual
    • S(E);P_SPINS(E),XP(b)
    • Threat
      • QAR1(D)
    • Vars
      • B(g);CHECK,OGATE,XS(E)::R(C),XB(g)
      • B(g);N_GUARD::QAB1(D),XB(g)
      • R(j);N_PINS(E)::S(E)
      • S(i);N_GUARD::R(H)
      • S(i);N_GUARD::R(H),XS(i)
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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).