MESON Chess Problem Database

Problem Display
PID: 6886 (8/5KP1/3Q2pB/n1pN1B1p/R1qk1n1R/rp1p1r1p/1P1Np3/7b w - - 0 1)

Toth, Julius

1st Prize, Munkassakk TT, 1934

8/5KP1/3Q2pB/n1pN1B1p/R1qk1n1R/rp1p1r1p/1P1Np3/7b

#2

10 + 14

6479 Problemschach (Sidler) 1968
3098 FIDE Album (1914-1944) (I) 1971
3979 Systematic Terminology 1984
136 Problem Observer 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Rxc4#
    • 1...Sb7
      • 2.Rxc4#
  • Tries
    • 1.Bxf4?
      • threat
        • 2.Be3#
        • 2.Be5#
        • 2.Qe5#
      • 1...e1Q
        • 2.Be3#
        • 2.Be5#
      • 1...e1R
        • 2.Be3#
        • 2.Be5#
      • 1...Re3
        • 2.Bxe3#
        • 2.Be5#
      • 1...Sc6
        • 2.Be3#
        • 2.Be5#
        • 2.Rxc4#
      • 1...Rxf4!
  • Keys
    • 1.Be4!
      • threat
        • 2.Qf6#
      • 1...Sg2+
        • 2.Sxf3#
      • 1...Sxd5+
        • 2.Bxf3#
      • 1...Se6+
        • 2.Sf6#
      • 1...Sc6
        • 2.Rxc4#

There are these versions: 7127

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(k);N_GUARD::R1(C),XQ(h)
  • Tries
    • Try
      • B(H);XS(j)
      • Threat
        • DUALS(3)
      • Refutation
        • R(f);P_PINB(F),P_SPINR(f),XB(H)
  • Actual
    • B(F);N_PINS(j)
    • Threat
      • QAB(G)
    • Vars
      • S(j);CHECK,S_CUTB(a)::S(B),XR(f)
      • S(j);CHECK,OGATEB,P_SPINS(j),XS(E)::R(D)+B(F),XR(f)
      • S(j);CHECK,N_PINS(E)::QAR(G)+S(E)
      • S(k);N_GUARD::R1(C),XQ(h)
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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).