MESON Chess Problem Database

Problem Display
PID: 59535 (6Qb/4pr2/2P5/2K1p2R/ppppkrnR/1q6/3PPP1B/8 w - - 0 1)

Ellerman, Arnoldo

1st HM., Brisbane Courier, 1922-1923

6Qb/4pr2/2P5/2K1p2R/ppppkrnR/1q6/3PPP1B/8

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...R4f6
      • 2.Rxe5#
    • 1...Rf5
      • 2.Qd5#
    • 1...R7f6
      • 2.Qd5#
    • 1...Rg7
      • 2.Qd5#
    • 1...Rh7
      • 2.Qd5#
    • 1...Rf8
      • 2.Qd5#
    • 1...Se3
      • 2.f3#
    • 1...Sf6
      • 2.Qg6#
    • 1...c3
      • 2.d3#
  • Tries
    • 1.Qg6+?
      • 1...R4f5
        • 2.Rxg4#
      • 1...R7f5!
  • Keys
    • 1.c7!
      • threat
        • 2.Qa8#
      • 1...R4f6
        • 2.Rxe5#
      • 1...R7f6
        • 2.Qd5#
      • 1...Rf8
        • 2.Qd5#
      • 1...Se3
        • 2.f3#
      • 1...Sf6
        • 2.Qg6#
      • 1...c3
        • 2.d3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • R(g);P_SPINS(h),S_CUTB(l)::R1(G),XP(i)
    • R(k);OGATE::QAB1(I)
    • S(h);P_SPINR(g),S_CUTQ(a)::P(C)
    • S(h);P_SPINR(g),S_CUTR(k)::QAB(I)
    • P(d);N_GUARD,S_CUTQ(a)::P(A)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • R(g);P_SPINR(g),P_SPINS(h),S_CUTR(k)::R(E),XS(h)
      • Refutation
        • R(k);P_SPINR(k)
  • Actual
    • P(H);
    • Threat
      • QAB(I)
    • Vars
      • R(g);P_SPINS(h),S_CUTB(l)::R1(G),XP(i)
      • R(k);OGATE::QAB1(I)
      • S(h);P_SPINR(g),S_CUTQ(a)::P(C)
      • S(h);P_SPINR(g),S_CUTR(k)::QAB(I)
      • P(d);N_GUARD,S_CUTQ(a)::P(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).