MESON Chess Problem Database

Problem Display
PID: 225340 (b2nN3/1n3p2/NQ3P2/p2kp3/B4P2/2K1P3/P7/8 w - - 0 1)

Pituk, Alexander

1st Comm., Praca, 1947

b2nN3/1n3p2/NQ3P2/p2kp3/B4P2/2K1P3/P7/8

#2

9 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Qxc6#
    • 1...Se6
      • 2.Bc6#
      • 2.Qc6#
    • 1...e4
      • 2.Sac7#
      • 2.Sec7#
      • 2.Bb3#
      • 2.Qb3#
  • Tries
    • 1.Bc2?
      • threat
        • 2.Sac7#
        • 2.Sec7#
        • 2.e4#
      • 1...Sd6
        • 2.Sac7#
        • 2.Sec7#
        • 2.Qxd6#
      • 1...Sc6
        • 2.Sac7#
        • 2.Qb3#
      • 1...Sc5
        • 2.Sac7#
        • 2.Sec7#
        • 2.Qd6#
      • 1...Se6
        • 2.e4#
      • 1...e4
        • 2.Sac7#
        • 2.Sec7#
        • 2.Bb3#
      • 1...exf4!
    • 1.Qd4+?
      • 1...Ke6
        • 2.Bd7#
        • 2.Qxe5#
        • 2.Qd7#
      • 1...exd4+!
    • 1.Qb5+?
      • 1...Ke6
        • 2.Qd7#
        • 2.Qxe5#
      • 1...Sc5
        • 2.Qc4#
      • 1...Ke4!
  • Keys
    • 1.Qb1!
      • 1...Ke6
        • 2.Sac7#
      • 1...exf4
        • 2.Qf5#
      • 1...Sc5
        • 2.Sac7#
      • 1...Sd6
        • 2.Sec7#
      • 1...Sc6
        • 2.Bb3#
      • 1...Se6
        • 2.e4#
      • 1...e4
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(g);N_GUARD::QAB1(G),XS(g)
  • Tries
    • Try
      • B(D);
      • Threat
        • DUALS(3)
      • Vars
        • S(g);::P(C)
      • Refutation
        • P(c);XP(E)
    • Try
      • Q(G);CHECK
      • Refutation
        • P(c);CHECK,XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • S(d);P_SPINS(d)::QAB1(G)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(G);
    • Vars
      • K(b);S_FLIGHT::S(F)
      • P(c);OGATEB,XP(E)::QAR2(G)
      • S(d);SBLOCK::S(F)
      • S(d);SBLOCK::S(I)
      • S(g);SBLOCK::B(D)
      • S(g);SBLOCK::P(C)
      • P(c);SBLOCK::QAB(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).