MESON Chess Problem Database

Problem Display
PID: 89847 (7B/q6B/p1prr1n1/3kp1bR/1P2N1K1/1PR2P2/2NP2Q1/8 w - - 0 1)

Ivanov, Vadim Aleksandrovich

Die Schwalbe, 2000

7B/q6B/p1prr1n1/3kp1bR/1P2N1K1/1PR2P2/2NP2Q1/8

#2

12 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Rxc5#
    • 1...Qb8
      • 2.Rd3#
      • 2.Rc5#
    • 1...Qb7
      • 2.Rd3#
      • 2.Rc5#
    • 1...Qc7
      • 2.Rd3#
      • 2.Rc5#
    • 1...Qd7
      • 2.Rd3#
      • 2.Rc5#
    • 1...Qe7
      • 2.Rd3#
      • 2.Rc5#
    • 1...Qf7
      • 2.Rd3#
      • 2.Rc5#
    • 1...Qg7
      • 2.Rd3#
      • 2.Rc5#
    • 1...Qxh7
      • 2.Rd3#
      • 2.Rc5#
    • 1...Qa8
      • 2.Rd3#
      • 2.Rc5#
  • Tries
    • 1.Sf6+?
      • 1...Bxf6
        • 2.f4#
      • 1...Rxf6!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Rd3#
      • 1...Qxc5
        • 2.Rxc5#
      • 1...Be3
        • 2.f4#
      • 1...Sf4
        • 2.Be4#
      • 1...e4
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(i);N_GUARD::R1(E),XQ(i)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • B(c);P_SPINP(b),XS(H)::QAB(C)+P(F)
      • Refutation
        • R(g);XS(H)
  • Actual
    • S(H);
    • Threat
      • R(E)
    • Vars
      • Q(i);OGATE,XS(H)::R1(E),XQ(i)
      • B(c);P_SPINP(b)::QAB(C)+P(F)
      • S(h);OGATE::B(K)
      • P(b);P_SPINB(c)::S(A)
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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).