MESON Chess Problem Database

Problem Display
PID: 174200 (1r2R3/B7/2p2p2/b2kPP2/4NPpq/2p5/bN1p1P1p/1B1Q3K w - - 0 1)

Buchner, Richard

Promadas, 1930

1r2R3/B7/2p2p2/b2kPP2/4NPpq/2p5/bN1p1P1p/1B1Q3K

#2

11 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf2
      • 2.Sxf6#
    • 1...Qg3
      • 2.Sxf6#
    • 1...Qh3
      • 2.Sxf6#
    • 1...Qh5
      • 2.Sxf6#
    • 1...Qh7
      • 2.Sxf6#
    • 1...Rb4
      • 2.Sxc3#
    • 1...Rb6
      • 2.Rd8#
    • 1...Bc7
      • 2.Sxc3#
    • 1...Bd8
      • 2.Sxc3#
    • 1...fxe5
      • 2.Rxe5#
  • Tries
    • 1.Rd8+?
      • 1...Bxd8
        • 2.Sxc3#
      • 1...Rxd8!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qd4#
      • 1...d1Q+
        • 2.Qxd1#
      • 1...d1R+
        • 2.Qxd1#
      • 1...Qxf2
        • 2.Sxf6#
      • 1...fxe5
        • 2.Rxe5#
      • 1...Rb4
        • 2.Sxc3#
      • 1...Rb6
        • 2.Rd8#
      • 1...Bc4
        • 2.Qxc4#
      • 1...Bb4
        • 2.Qxa2#
      • 1...Bb6
        • 2.Bxa2#
      • 1...c5
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 6
  • Sets
    • Q(f);N_GUARD,XP(E)::S(F),XP(j)
    • Q(f);N_GUARD::S(F),XP(j)
    • R(k);S_CUTB(g)::S(F),XP(d)
    • R(k);N_GUARD,S_CUTB(g)::R(K)
    • B(g);N_GUARD::S(F),XP(d)
    • P(j);OGATE,XP(H)::R1(K),XP(j)
  • Tries
    • Try
      • R(K);CHECK
      • Vars
        • B(g);XR(K)::S(F),XP(d)
      • Refutation
        • R(k);XR(K)
  • Actual
    • Q(B);N_PINP(b)
    • Threat
      • QAR1(B)
    • Vars
      • P(b);CHECK,OGATEB::QAR(B),XQ(b)
      • P(b);CHECK,OGATEB::QAR(B),XR(b)
      • Q(f);N_GUARD,XP(E)::S(F),XP(j)
      • P(j);OGATE,XP(H)::R1(K),XP(j)
      • R(k);S_CUTB(g)::S(F),XP(d)
      • R(k);N_GUARD,S_CUTB(g)::R(K)
      • B(a);N_GUARD::QAB1(B),XB(a)
      • B(g);S_CUTR(k)::QAB(B),XB(a)
      • B(g);S_CUTR(k)::B(A),XB(a)
      • P(i);OGATE::QAR2(B)
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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).