MESON Chess Problem Database

Problem Display
PID: 135880 (4r3/p1R3b1/1P1p4/1PNk1P2/1PN2Q2/K1P1pP2/8/1b1r1n2 w - - 0 1)

Issler, Werner

2nd Comm., BCF 092. Ty., 1959-1960

4r3/p1R3b1/1P1p4/1PNk1P2/1PN2Q2/K1P1pP2/8/1b1r1n2

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...dxc5
      • 2.Rxc5#
      • 2.Rd7#
    • 1...axb6
      • 2.Sxb6#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Qxd6#
      • 1...Re5
        • 2.Qd4#
      • 1...Rd8
        • 2.Qe4#
      • 1...Be5
        • 2.Qe4#
      • 1...Bf8
        • 2.Qd4#
      • 1...Re6!
  • Keys
    • 1.Se5!
      • threat
        • 2.c4#
      • 1...dxc5
        • 2.Rd7#
      • 1...dxe5
        • 2.Rd7#
      • 1...Rc1
        • 2.Qd4#
      • 1...Rd3
        • 2.Qe4#
      • 1...Rd4
        • 2.Qxd4#
      • 1...Ba2
        • 2.Qe4#
      • 1...Bd3
        • 2.Qd4#
      • 1...Be4
        • 2.Qxe4#
        • 2.fxe4#
      • 1...Sd2
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • P(g);XP(J)::S(E),XP(g)
  • Tries
    • Try
      • S(H);
      • Threat
        • QAR1(F),XP(f)
      • Vars
        • R(i);S_CUTB(h)::QAR1(F)
        • R(i);N_GUARD::QAB1(F)
        • B(h);S_CUTR(i)::QAB1(F)
        • B(h);N_GUARD::QAR1(F)
      • Refutation
        • R(i);
  • Actual
    • S(E);
    • Threat
      • P(B)
    • Vars
      • P(f);OGATEB,XS(H)::R(K)
      • P(f);OGATEB,XS(E)::R(K)
      • R(b);N_GUARD::QAR1(F)
      • R(b);P_PINP(B),S_CUTB(a)::QAB1(F)
      • R(b);N_GUARD::QAR1(F),XR(b)
      • B(a);N_GUARD::QAB1(F)
      • B(a);S_CUTR(b)::QAR1(F)
      • S(c);S_CUTR(b)::QAR1(F)
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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).