MESON Chess Problem Database

Problem Display
PID: 237023 (n3R2q/b1Bb1P2/r4p2/p5N1/1P1kPQ2/Np1r4/1K3Pn1/8 w - - 0 1)

Pituk, Alexander

Szachy, 1953

n3R2q/b1Bb1P2/r4p2/p5N1/1P1kPQ2/Np1r4/1K3Pn1/8

#2

10 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd2+
      • 2.Qxd2#
    • 1...Rd6
      • 2.Qxd6#
    • 1...Bb6
      • 2.Qd6#
    • 1...Bc6
      • 2.Se6#
    • 1...Se3
      • 2.Sf3#
  • Tries
    • 1.Qe3+?
      • 1...Sxe3
        • 2.Sf3#
      • 1...Rxe3!
    • 1.Qxf6+?
      • 1...Rxf6
        • 2.Be5#
      • 1...Qxf6!
    • 1.e5+?
      • 1...Kd5
        • 2.Qc4#
        • 2.Qe4#
      • 1...Sxf4!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Qc4#
      • 1...Rd2+
        • 2.Qxd2#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Rc6
        • 2.Sb5#
      • 1...Bb5
        • 2.Sxb5#
      • 1...Be6
        • 2.Sb5#
      • 1...Se3
        • 2.Sf3#
      • 1...Sb6
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • R(c);CHECK,OGATEB::QAR2(F),XR(c)
    • R(f);N_GUARD::QAR2(F),XR(f)
    • B(h);S_CUTR(f)::QAR2(F)
    • B(i);N_GUARD,S_CUTR(f)::S(G)
    • S(a);S_CUTR(c)::S(G)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • S(a);XQ(F)::S(G)
      • Refutation
        • R(c);XQ(F)
    • Try
      • Q(F);CHECK,XP(g)
      • Vars
        • R(f);XQ(F)::B(H)
      • Refutation
        • Q(k);XQ(F)
    • Try
      • P(E);CHECK
      • Refutation
        • S(a);XQ(F)
  • Actual
    • Q(F);
    • Threat
      • QAR1(F)
    • Vars
      • R(c);CHECK,OGATEB::QAR2(F),XR(c)
      • R(c);N_GUARD::QAB1(F),XR(c)
      • R(f);S_CUTB(i)::S(C)
      • B(i);N_GUARD::S(C),XB(i)
      • B(i);N_GUARD::S(C)
      • S(a);S_CUTR(c)::S(G)
      • S(j);S_CUTB(h)::QAB1(F)
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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).