MESON Chess Problem Database

Problem Display
PID: 87653 (2n5/3Q4/2p1N1B1/4k2N/r3p3/r1b1R3/8/2R3K1 w - - 0 1)

Meyer, Simon S

American Chess Problemist, 1950

2n5/3Q4/2p1N1B1/4k2N/r3p3/r1b1R3/8/2R3K1

#2

7 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Rxe4#
    • 1...Ra6
      • 2.Rxe4#
    • 1...Ra7
      • 2.Rxe4#
    • 1...Ra8
      • 2.Rxe4#
    • 1...Ba1
      • 2.Rc5#
    • 1...Be1
      • 2.Rc5#
    • 1...Bb2
      • 2.Rc5#
    • 1...Bd2
      • 2.Rc5#
    • 1...Bb4
      • 2.Rxe4#
    • 1...Ba5
      • 2.Rc5#
  • Tries
    • 1.Sd8?
      • threat
        • 2.Sxc6#
        • 2.Sf7#
      • 1...Rc4
        • 2.Sf7#
      • 1...Ra6
        • 2.Sf7#
        • 2.Rxe4#
      • 1...Sa7
        • 2.Sf7#
      • 1...Se7
        • 2.Sf7#
      • 1...c5
        • 2.Sc6#
        • 2.Sf7#
      • 1...Sd6!
  • Keys
    • 1.Sef4!
      • threat
        • 2.Sd3#
      • 1...Sd6
        • 2.Qg7#
      • 1...Rd4
        • 2.Qe6#
      • 1...Ba1
        • 2.Rc5#
      • 1...Be1
        • 2.Rc5#
      • 1...Bb2
        • 2.Rc5#
      • 1...Bd2
        • 2.Rc5#
      • 1...Bb4
        • 2.Rxe4#
      • 1...Bd4
        • 2.Qe6#
      • 1...Ba5
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(c);N_GUARD::R1(C),XP(d)
    • B(b);OGATE::R(A)
    • B(b);S_CUTR(c)::R1(C),XP(d)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::S(E)
        • S(g);::S(E)
      • Refutation
        • S(g);
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • S(g);SBLOCK::QAB(G)
      • R(c);SBLOCK::QAR1(G)
      • B(b);OGATE::R(A)
      • B(b);S_CUTR(c)::R1(C),XP(d)
      • B(b);P_PINR(C),SBLOCK::QAR1(G)
HTML5 logo

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).