MESON Chess Problem Database

Problem Display
PID: 26820 (4KBn1/2N5/2B1pp2/p4p1p/P4R2/1k2r1Rq/p2P2p1/rbQ5 w - - 0 1)

Shanshin, Valery Yurevich

2nd HM., Die Schwalbe, 2001

4KBn1/2N5/2B1pp2/p4p1p/P4R2/1k2r1Rq/p2P2p1/rbQ5

#2

9 + 13

133 The Problemist Supplement 2001
23 Die Schwalbe 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Rc3
      • 2.Qxc3#
    • 1...Bc2
      • 2.Qa3#
    • 1...Bd3
      • 2.Qc3#
    • 1...e5
      • 2.Bd5#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Sd4#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Bc2
        • 2.Qa3#
      • 1...e5
        • 2.Bd5#
      • 1...Se7!
    • 1.Rxe3+?
      • 1...Bd3
        • 2.Qc3#
      • 1...Qxe3!
  • Keys
    • 1.Sxe6!
      • threat
        • 2.Bd5#
      • 1...Bd3
        • 2.Qc3#
      • 1...Be4
        • 2.Sd4#
      • 1...Se7
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(f);N_GUARD::QAR1(A),XR(f)
    • B(b);SBLOCK::QAR1(A)
    • B(b);N_SPINR(f),S_CUTR(f)::QAR1(A)
    • P(k);N_GUARD::B(F)
  • Tries
    • Try
      • S(G);
      • Threat
        • S(G)
      • Vars
        • R(f);N_GUARD::QAR1(A),XR(f)
        • B(b);SBLOCK::QAR1(A)
        • P(k);N_GUARD::B(F)
      • Refutation
        • S(m);
    • Try
      • R(C);CHECK,XR(f)
      • Vars
        • B(b);P_SPINB(b)::QAR1(A)
      • Refutation
        • Q(g);XR(C)
  • Actual
    • S(G);P_SPINS(G),XP(k)
    • Threat
      • B(F)
    • Vars
      • B(b);N_SPINR(f),S_CUTR(f)::QAR1(A)
      • B(b);N_PINS(G)::S(G)
      • S(m);N_PINS(G)::S(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).