MESON Chess Problem Database

Problem Display
PID: 204332 (2b2qBB/5n2/1R2n2p/1ppkNR1r/1p1P4/5N1p/2Q5/6bK w - - 0 1)

Ellerman, Arnoldo

1st HM., Centurini/Guidelli MT, 1925

2b2qBB/5n2/1R2n2p/1ppkNR1r/1p1P4/5N1p/2Q5/6bK

#2

9 + 12

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rh4
      • 2.Sxf7#
    • 1...Seg5
      • 2.Sd7#
    • 1...Sfg5
      • 2.Sf7#
    • 1...cxd4
      • 2.Qc6#
  • Tries
    • 1.Sg6+?
      • 1...Se5
        • 2.Sf4#
      • 1...Rxf5!
    • 1.Sd7+?
      • 1...Se5
        • 2.Bxe6#
      • 1...Rxf5!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Qe4#
      • 1...Kxd4
        • 2.Qd3#
      • 1...cxd4
        • 2.Qc6#
      • 1...Rh4
        • 2.Sxf7#
      • 1...Seg5
        • 2.Sd7#
      • 1...Sfg5
        • 2.Sf7#
      • 1...Sd6
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(g);N_GUARD::R(F)+S(E),XS(j)
    • S(h);P_SPINS(j),S_CUTR(g)::R(F)+S(E)
    • S(j);P_SPINS(h),S_CUTR(g)::R(F)+S(E)
    • P(e);OGATE,XP(D)::QAB1(B)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • S(j);P_SPINS(j)::S(E)
      • Refutation
        • R(g);XR(F)
    • Try
      • S(E);CHECK
      • Vars
        • S(j);OGATE,P_SPINS(j)::B(H),XS(h)
      • Refutation
        • R(g);XR(F)
  • Actual
    • S(C);
    • Threat
      • QAB1(B)
    • Vars
      • K(f);OGATEB,P-FLIGHT,XP(D)::QAR1(B)
      • P(e);OGATE,SBLOCK,XP(D)::QAB1(B)
      • R(g);N_GUARD::R(F)+S(E),XS(j)
      • S(h);P_SPINS(j),S_CUTR(g)::R(F)+S(E)
      • S(j);P_SPINS(h),S_CUTR(g)::R(F)+S(E)
      • S(j);P_SPINS(h),S_CUTQ(l)::QAR1(B),XP(e)
HTML5 logo

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).