MESON Chess Problem Database

Problem Display
PID: 173748 (2B5/1Np1b2p/1pk3qR/Pp6/8/1Nr5/2Q3b1/1K1Rn3 w - - 0 1)

Boros, Sandor

Shakhmatny Listok, 1929

2B5/1Np1b2p/1pk3qR/Pp6/8/1Nr5/2Q3b1/1K1Rn3

#2

8 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.Qxc3#
    • 1...Bf1
      • 2.Qe4#
    • 1...Bh3
      • 2.Qe4#
    • 1...Be4
      • 2.Qxe4#
    • 1...Bd5
      • 2.Sd4#
    • 1...Ba3
      • 2.Sd8#
    • 1...Bb4
      • 2.Sd8#
    • 1...Bc5
      • 2.Sd8#
    • 1...Bd6
      • 2.Sd8#
    • 1...Bd8
      • 2.Sxd8#
    • 1...Bf8
      • 2.Sd8#
    • 1...Sd3
      • 2.Qxg2#
    • 1...Sf3
      • 2.Qe4#
  • Tries
    • 1.Rxg6+?
      • 1...Bd6
        • 2.Sd8#
        • 2.Qxc3#
      • 1...Bf6
        • 2.Sd8#
        • 2.Rxf6#
        • 2.Qxc3#
      • 1...hxg6!
    • 1.Qxg6+?
      • 1...Bd6
        • 2.Sd8#
        • 2.Qe8#
      • 1...Bf6
        • 2.Sd8#
        • 2.Qe8#
        • 2.Qxf6#
      • 1...hxg6!
  • Keys
    • 1.a6!
      • threat
        • 2.Bd7#
      • 1...Sd3
        • 2.Qxg2#
      • 1...Qd6
        • 2.Qxc3#
      • 1...Bh3
        • 2.Qe4#
      • 1...Bd5
        • 2.Sd4#
      • 1...Bd6
        • 2.Sd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 8
  • Sets
    • Q(g);N_PINQ(C)::QAR(C),XR(c)
    • B(b);N_GUARD::QAB(C)
    • B(b);N_GUARD::QAB(C),XB(b)
    • B(b);SBLOCK::S(D)
    • B(i);N_GUARD::S(G)
    • B(i);N_GUARD,N_SPINR(c)::S(G)
    • B(i);N_GUARD,N_SPINQ(g)::S(G)
    • B(i);N_GUARD::S(G),XB(i)
    • S(a);N_PINQ(C)::QAB(C),XB(b)
    • S(a);S_CUTB(b)::QAB(C)
  • Tries
    • Try
      • R(F);CHECK,N_SPINQ(C),XQ(g)
      • Refutation
        • P(j);XR(F)
    • Try
      • Q(C);CHECK,N_PINR(c),N_SPINQ(C),XQ(g)
      • Refutation
        • P(j);P_SPINP(j),XQ(C)
  • Actual
    • P(E);
    • Threat
      • B(H)
    • Vars
      • S(a);N_PINQ(C)::QAB(C),XB(b)
      • Q(g);N_PINQ(C)::QAR(C),XR(c)
      • B(b);N_GUARD::QAB(C)
      • B(b);SBLOCK::S(D)
      • B(i);N_GUARD,N_SPINQ(g)::S(G)
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).