MESON Chess Problem Database

Problem Display
PID: 173721 (5NK1/rp1Rp1p1/PPk2qQp/PpN4r/1B5p/6n1/B3p3/8 w - - 0 1)

Boros, Sandor

Comm., Gyoeri Sakkoer, 1924

5NK1/rp1Rp1p1/PPk2qQp/PpN4r/1B5p/6n1/B3p3/8

#2

10 + 12

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.Rc7#
    • 1...Qe6+
      • 2.Qxe6#
    • 1...Rd5
      • 2.Bxd5#
    • 1...Sf5
      • 2.Bd5#
      • 2.Qg2#
    • 1...e5
      • 2.Bd5#
  • Tries
    • 1.Se4?
      • threat
        • 2.Rc7#
      • 1...Qe6+
        • 2.Qxe6#
      • 1...bxa6!
    • 1.Sxb7?
      • threat
        • 2.Sd8#
        • 2.Rc7#
      • 1...Qe6+
        • 2.Qxe6#
      • 1...Ra8
        • 2.Rc7#
      • 1...e6
        • 2.Rd6#
        • 2.Rc7#
      • 1...Rxb7!
    • 1.Qe4+?
      • 1...Rd5
        • 2.Bxd5#
        • 2.Qxd5#
      • 1...Sxe4!
  • Keys
    • 1.Sb3!
      • threat
        • 2.Sd4#
      • 1...Qe6+
        • 2.Qxe6#
      • 1...Rd5
        • 2.Rc7#
      • 1...Sf5
        • 2.Qg2#
      • 1...e5
        • 2.Qc2#
      • 1...e6
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(g);::R1(H)
    • Q(g);CHECK,OGATE::QAR2(G),XQ(g)
    • R(e);N_GUARD::B(A),XR(e)
    • P(k);S_CUTR(e)::B(A)
  • Tries
    • Try
      • S(D);
      • Threat
        • R1(H)
      • Vars
        • Q(g);CHECK,OGATE::QAR2(G),XQ(g)
      • Refutation
        • P(j);XP(E)
    • Try
      • S(D);XP(j)
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);CHECK,OGATE::QAR2(G),XQ(g)
        • R(i);P_PINS(I)::R1(H)
      • Refutation
        • R(i);XS(D)
    • Try
      • Q(G);CHECK,N_PINQ(g)
      • Refutation
        • S(b);XQ(G)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • Q(g);CHECK,OGATE::QAR2(G),XQ(g)
      • R(e);SBLOCK::R1(H)
      • S(b);OGATE::QAB(G)
      • P(k);S_CUTR(e)::QAR(G)
      • P(k);N_GUARD,N_SPINQ(g),S_CUTQ(g)::R1(H)
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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).