MESON Chess Problem Database

Problem Display
PID: 176206 (2N5/3r1p2/1p2pP1R/4k3/RN4P1/4Bb2/3p1rp1/KQ6 w - - 0 1)

Hannelius, Jan Ingvar

Schach-Echo, 1976

2N5/3r1p2/1p2pP1R/4k3/RN4P1/4Bb2/3p1rp1/KQ6

#2

9 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Sc6#
    • 1...Bd5
      • 2.Sd3#
  • Tries
    • 1.Sd3+?
      • 1...Kd5
        • 2.Qb5#
      • 1...Rxd3!
    • 1.Sc6+?
      • 1...Kd5
        • 2.Qb5#
      • 1...Bxc6!
    • 1.Qb2+?
      • 1...Rd4
        • 2.Qxd4#
      • 1...Ke4!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Rh5#
      • 1...Kxd5
        • 2.Qb5#
      • 1...Rxd5
        • 2.Bf4#
      • 1...Bxg4
        • 2.Qe4#
      • 1...Bxd5
        • 2.Qb2#
      • 1...exd5
        • 2.Qf5#
      • 1...Bd1
        • 2.Qe4#
      • 1...Be2
        • 2.Qe4#
      • 1...Be4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(h);SBLOCK,S_CUTB(d)::S(E)
    • B(d);SBLOCK,S_CUTR(h)::S(E)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(e);P-FLIGHT::QAR2(B)
      • Refutation
        • R(h);XS(E)
    • Try
      • S(E);CHECK
      • Vars
        • K(e);P-FLIGHT::QAR2(B)
      • Refutation
        • B(d);XS(E)
    • Try
      • Q(B);CHECK
      • Vars
        • R(h);N_GUARD,P_SPINR(h)::QAB1(B),XR(h)
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • S(E);
    • Threat
      • R(H)
    • Vars
      • K(e);OGATEB,P-FLIGHT,XS(E)::QAR2(B)
      • R(h);SBLOCK,XS(E)::B(C)
      • B(d);N_GUARD,XP(F)::QAR1(B)
      • B(d);SBLOCK,XS(E)::QAB(B)
      • P(g);N_GUARD,SBLOCK,XS(E)::QAR1(B)
      • B(d);N_GUARD::QAR1(B)
      • B(d);N_GUARD::QAR1(B),XB(d)
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).