MESON Chess Problem Database

Problem Display
PID: 250180 (8/qnn3Q1/1bb2PBB/pp5K/2p2R2/4k3/1NR1pp2/8 w - - 0 1)

Kreitsman, V

64 Shakhmatnoe obozrenie, 1927

8/qnn3Q1/1bb2PBB/pp5K/2p2R2/4k3/1NR1pp2/8

#2

8 + 11

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3+
      • 2.Rg4#
    • 1...e1S
      • 2.Sd1#
    • 1...e1B
      • 2.Sd1#
    • 1...b4
      • 2.Sxc4#
  • Tries
    • 1.Qe7+?
      • 1...Be4
        • 2.Qxe4#
      • 1...Se6!
  • Keys
    • 1.f7!
      • threat
        • 2.Qc3#
      • 1...Bf3+
        • 2.Rg4#
      • 1...e1Q
        • 2.Rfxf2#
      • 1...e1S
        • 2.Sd1#
        • 2.Rfxf2#
      • 1...e1B
        • 2.Sd1#
        • 2.Rfxf2#
      • 1...Bd4
        • 2.Rf6#
      • 1...Be4
        • 2.Rf5#
      • 1...Sc5
        • 2.Qd4#
      • 1...Sd5
        • 2.Qe5#
      • 1...c3
        • 2.Qxc3#
      • 1...b4
        • 2.Sxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • B(h);CHECK,SBLOCK::B(G)+R(C)
    • P(a);N_GUARD::S(A)
    • P(f);N_GUARD::S(A),XP(d)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • B(h);N_GUARD,P_SPINB(h)::QAR1(H),XB(h)
      • Refutation
        • S(k);P_SPINS(k)
  • Actual
    • P(E);
    • Threat
      • QAR2(H)
    • Vars
      • B(h);CHECK,SBLOCK::B(G)+R(C)
      • P(a);::B(G)+R(C),XP(b)
      • B(g);SBLOCK::B(G)+R(C)
      • B(h);SBLOCK::B(G)+R(C)
      • S(j);S_CUTB(g)::QAB1(H)
      • S(k);S_CUTB(h)::QAR2(H)
      • P(d);::QAR2(H),XP(d)
      • P(f);N_GUARD::S(A),XP(d)
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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).