MESON Chess Problem Database

Problem Display
PID: 143267 (2N1n3/2nB4/1N2p3/p1kpQb1R/pr3p1K/B4p1p/8/2r5 w - - 0 1)

Kubbel, Leonid Ivanovich (AKA Kubbel, Karl Artur Leonid)

3rd Prize, Magyar Sakkvilag, 1929

2N1n3/2nB4/1N2p3/p1kpQb1R/pr3p1K/B4p1p/8/2r5

#2

7 + 13

35 L'Italia Scacchistica 1930
38 Magyar Sakkvilag 1930

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qc3#
    • 1...Rb1
      • 2.Qc3#
    • 1...Rd1
      • 2.Qc3#
    • 1...Re1
      • 2.Qc3#
    • 1...Rf1
      • 2.Qc3#
    • 1...Rg1
      • 2.Qc3#
    • 1...Rh1
      • 2.Qc3#
    • 1...Rc3
      • 2.Qxc3#
    • 1...Rc4
      • 2.Sxa4#
    • 1...Bc2
      • 2.Qc3#
  • Tries
    • 1.Qe3+?
      • 1...d4
        • 2.Qxc1#
      • 1...fxe3+!
  • Keys
    • 1.Qxf4!
      • threat
        • 2.Sxa4#
      • 1...Be4
        • 2.Qe3#
      • 1...Bc2
        • 2.Qc4#
      • 1...d4
        • 2.Qxc1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • R(a);N_GUARD::QAR2(C)
    • R(a);N_GUARD::QAR2(C),XR(a)
    • R(a);SBLOCK::S(E),XP(d)
    • B(j);S_CUTR(a)::QAR2(C)
  • Tries
    • Try
      • Q(C);CHECK,N_PINP(i)
      • Vars
        • P(i);P_SPINB(j),P_SPINP(i),SBLOCK::QAR(C),XR(a)
      • Refutation
        • P(f);CHECK,XQ(C)
  • Actual
    • Q(C);N_PINP(i),P_SPINQ(C),XP(f)
    • Threat
      • S(E),XP(d)
    • Vars
      • B(j);N_PINQ(C),P_SPINP(i)::QAB(C)
      • B(j);P_SPINP(i),S_CUTR(a)::QAR1(C)
      • P(i);N_PINQ(C),P_SPINB(j),SBLOCK::QAR(C),XR(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).