MESON Chess Problem Database

Problem Display
PID: 250186 (5K2/3p3p/3R4/2pN2Q1/3k1Np1/1Pb2b2/2n1Pqr1/6B1 w - - 0 1)

Ivanov, NE

Shakhmaty, 1927

5K2/3p3p/3R4/2pN2Q1/3k1Np1/1Pb2b2/2n1Pqr1/6B1

#2

8 + 10

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Qf6#
      • 2.Qg7#
  • Tries
    • 1.Se6+?
      • 1...Ke4
        • 2.Sxc3#
        • 2.Qf4#
      • 1...dxe6!
    • 1.Sf6+?
      • 1...Ke3
        • 2.Rd3#
      • 1...Bd5!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Qe5#
      • 1...Bxe2+
        • 2.Sf6#
      • 1...Be4+
        • 2.Qf6#
      • 1...Bxd5+
        • 2.Qf4#
      • 1...Ke4
        • 2.Sxc3#
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • P(i);XS(D)
    • Try
      • S(E);CHECK
      • Vars
        • K(f);OGATE,S_FLIGHT::R1(G)
      • Refutation
        • B(e);P_SPINB(e)
  • Actual
    • S(D);
    • Threat
      • QAB1(F)
    • Vars
      • B(e);CHECK,N_GUARD,XP(B)::R(G)+S(E)
      • B(e);CHECK,SBLOCK::QAB(F)
      • B(e);CHECK,N_GUARD,P_SPINB(e),XS(E)::QAR2(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).