MESON Chess Problem Database

Problem Display
PID: 263080 (1b2R3/4B1p1/2p1N3/Q2BkpK1/1n1Nb1R1/4p3/6p1/8 w - - 0 1)

Markovtsy, Vassyl Yuriovich

Shanshin, Valery Yurevich

6th Prize, SuperProblem, 2020

1b2R3/4B1p1/2p1N3/Q2BkpK1/1n1Nb1R1/4p3/6p1/8

#2

8 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Sf3#
    • 1...Bc2
      • 2.Sf3#
    • 1...Bd3
      • 2.Sf3#
    • 1...Bf3
      • 2.Sxf3#
    • 1...Sa2
      • 2.Sxc6#
    • 1...Sc2
      • 2.Sxc6#
    • 1...Sd3
      • 2.Sxc6#
    • 1...Sa6
      • 2.Sxc6#
  • Tries
    • 1.Bxb4?
      • threat
        • 2.Sxc6#
      • 1...cxd5
        • 2.Sc6#
      • 1...c5!
    • 1.Bf6+?
      • 1...Kd6
        • 2.Rd8#
        • 2.Qd8#
      • 1...gxf6+!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Bc5#
      • 1...Kxd4
        • 2.Qa1#
      • 1...Bxd5
        • 2.Sg6#
      • 1...Sxd5
        • 2.Sxc6#
      • 1...Bd6
        • 2.Bf6#
      • 1...c5
        • 2.Bxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 8
  • Sets
    • B(d);N_GUARD::S(A)
    • B(d);N_GUARD::S(A),XB(d)
    • S(c);N_GUARD::S(A),XP(g)
  • Tries
    • Try
      • B(G);XS(c)
      • Threat
        • S(A),XP(g)
      • Vars
        • P(g);P_SPINP(g),XB(D)::S(A)
      • Refutation
        • P(g);
    • Try
      • B(G);CHECK
      • Refutation
        • P(h);CHECK,XB(G)
  • Actual
    • S(F);
    • Threat
      • R(H)+B(G)
    • Vars
      • K(e);OGATEB,S_FLIGHT,XS(A)::QAB(C)
      • B(d);P_SPINB(d),XB(D)::S(F)
      • S(c);N_GUARD,P_SPINS(c),XB(D)::S(A),XP(g)
      • B(i);SBLOCK::R(H)+B(G),DCHECK
      • P(g);::R(H)+B(G),XP(g)
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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).