MESON Chess Problem Database

Problem Display
PID: 83768 (2b4K/2p2p2/r6p/q2nQ2N/4PNk1/2p4R/3b1r2/4BB2 w - - 0 1)

Ellerman, Arnoldo

Szachy, 1952

2b4K/2p2p2/r6p/q2nQ2N/4PNk1/2p4R/3b1r2/4BB2

#2

8 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re2
      • 2.Bxe2#
    • 1...Rf3
      • 2.Rh4#
    • 1...Re6
      • 2.Qf5#
    • 1...Ra7
      • 2.Qg7#
    • 1...Ra8
      • 2.Qg7#
    • 1...Bf5
      • 2.Qxf5#
    • 1...Be6
      • 2.Qg7#
    • 1...Bb7
      • 2.Qf5#
    • 1...Sb6
      • 2.Sf6#
    • 1...c6
      • 2.Qg7#
  • Tries
    • 1.Be2+?
      • 1...Rf3
        • 2.Bxf3#
        • 2.Rh4#
      • 1...Rxe2!
  • Keys
    • 1.Se6!
      • threat
        • 2.Qg3#
      • 1...Rg2
        • 2.Qf5#
      • 1...Rf4
        • 2.Qg7#
      • 1...Rf3
        • 2.Rh4#
      • 1...Bf4
        • 2.Qf5#
      • 1...Sf4
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • R(b);N_GUARD::B(B),XR(b)
    • R(b);SBLOCK::R1(C)
    • R(g);S_CUTB(k)::QAB1(F)
    • R(g);N_GUARD::QAR(F)
    • B(k);N_GUARD::QAB1(F),XB(k)
    • B(k);S_CUTR(g)::QAR(F)
    • B(k);N_GUARD::QAB1(F)
    • S(f);N_GUARD,S_CUTR(g)::S(G)
    • P(i);S_CUTR(g)::QAR(F)
  • Tries
    • Try
      • B(B);CHECK
      • Refutation
        • R(b);XB(B)
  • Actual
    • S(E);
    • Threat
      • QAR1(F)
    • Vars
      • R(b);N_GUARD::QAB1(F)
      • R(b);S_CUTB(a)::QAR(F)
      • R(b);SBLOCK::R1(C)
      • B(a);S_CUTR(b)::QAB1(F)
      • S(f);N_GUARD,S_CUTR(b)::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).