MESON Chess Problem Database

Problem Display
PID: 199351 (b1Q1K1B1/3NP2n/rb3p1B/2p2PR1/2N1kr1p/2P2p2/2P2p2/5n2 w - - 0 1)

Basisty, Mark Borisovich

The Problemist, 2019

b1Q1K1B1/3NP2n/rb3p1B/2p2PR1/2N1kr1p/2P2p2/2P2p2/5n2

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Ba5
      • 2.Sxc5#
    • 1...Bc7
      • 2.Sxc5#
    • 1...Bd8
      • 2.Sxc5#
    • 1...Bc6
      • 2.Qxc6#
    • 1...Bb7
      • 2.Qxb7#
    • 1...Se3
      • 2.Sd2#
      • 2.Sd6#
    • 1...Sxg5
      • 2.Sxf6#
    • 1...Sf8
      • 2.Sxf6#
  • Tries
    • 1.Qxc5?
      • threat
        • 2.Sd6#
      • 1...Rxf5
        • 2.Qxf5#
      • 1...Bxc5
        • 2.Sxc5#
      • 1...Rg4
        • 2.Rxg4#
      • 1...Ba5
        • 2.Qd4#
      • 1...Bc7
        • 2.Qd4#
      • 1...Bd8
        • 2.Qd4#
      • 1...Ba7!
  • Keys
    • 1.Rg4!
      • threat
        • 2.Rxf4#
      • 1...Kxf5
        • 2.Sxc5#
      • 1...Rxg4
        • 2.Sd6#
      • 1...Bc7
        • 2.Sxc5#
      • 1...Sg5
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • B(i);N_GUARD::S(G),XP(g)
    • B(l);N_GUARD,P_PINS(G)::QAB(I),XB(l)
    • B(l);N_GUARD::QAB(I),XB(l)
    • S(k);N_GUARD,XR(E)::S(G),XP(j)
    • S(k);N_GUARD::S(G),XP(j)
  • Tries
    • Try
      • Q(I);XP(g)
      • Threat
        • S(C)
      • Vars
        • R(e);OGATE,XP(D)::QAB1(I),XR(e)
        • B(i);XQ(I)::S(G),XB(i)
        • R(e);OGATEB::R(E),XR(e)
        • B(i);N_GUARD::QAR1(I)
      • Refutation
        • B(i);
  • Actual
    • R(E);P_PINR(e)
    • Threat
      • R1(E),XR(e)
    • Vars
      • K(d);N_SPINR(e),S_FLIGHT,XP(D)::QAB(I)+S(G),XP(g)
      • R(e);N_SPINR(e),XR(E)::S(C)
      • B(i);N_GUARD::S(G),XP(g)
      • S(k);N_GUARD::S(G),XP(j)
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).