MESON Chess Problem Database

Problem Display
PID: 64447 (5RK1/8/3p4/R1nrkPB1/qpQ4p/2n2b1r/2NP3b/8 w - - 0 1)

Ellerman, Arnoldo

3rd Prize, Good Companions (December), 1917

5RK1/8/3p4/R1nrkPB1/qpQ4p/2n2b1r/2NP3b/8

#2

8 + 11

3132 The Good Companion Two-Mover 1922
3391 Het Half Pin Thema 1924
56 The Problemist 2006

SOLUTION

  • SOUND
  • Sets
    • 1...Rg3
      • 2.Qf4#
    • 1...Rxd2
      • 2.Qe6#
    • 1...Rd3
      • 2.Qe6#
    • 1...Rd4
      • 2.Qe6#
      • 2.Qxd4#
    • 1...Bg1
      • 2.Bf4#
      • 2.Qf4#
    • 1...Bf4
      • 2.Bxf4#
      • 2.Qxf4#
    • 1...Sd3
      • 2.Qd4#
    • 1...Se4
      • 2.Qd4#
      • 2.d4#
    • 1...Sa6
      • 2.Qd4#
    • 1...Sb7
      • 2.Qd4#
    • 1...Sd7
      • 2.Qd4#
  • Tries
    • 1.Qxc3+?
      • 1...Ke4
        • 2.Qe3#
      • 1...Rd4
        • 2.Qxd4#
      • 1...bxc3!
    • 1.d4+?
      • 1...Rxd4
        • 2.Qe6#
        • 2.Qxd4#
      • 1...Ke4!
  • Keys
    • 1.Se3!
      • threat
        • 2.Bf6#
      • 1...Rd4
        • 2.Qe6#
      • 1...Rg3
        • 2.Qf4#
      • 1...Be4
        • 2.Sg4#
      • 1...S3e4
        • 2.Qxd5#
      • 1...S5e4
        • 2.d4#
      • 1...Sd7
        • 2.Re8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • R(d);P_PINB(F),S_CUTB(a)::QAB1(C)
    • R(i);OGATE,P_SPINS(h),XP(B)::QAR1(C)
    • R(i);OGATE,P_SPINS(h)::QAR1(C)
    • S(h);P_SPINR(i)::QAB1(C)
  • Tries
    • Try
      • Q(C);CHECK,XS(b)
      • Vars
        • K(j);P-FLIGHT::QAR1(C)
        • R(i);N_GUARD,P_SPINR(i),P_SPINS(h)::QAB1(C),XR(i)
      • Refutation
        • P(f);XQ(C)
    • Try
      • P(B);CHECK
      • Refutation
        • K(j);P-FLIGHT
  • Actual
    • S(A);
    • Threat
      • B(F)
    • Vars
      • R(i);OGATE,P_SPINS(h),SBLOCK::QAR1(C)
      • R(d);P_PINB(F),S_CUTB(a)::QAB1(C)
      • B(c);N_GUARD::S(A)
      • S(b);N_GUARD,S_CUTB(c)::QAR1(C),XR(i)
      • S(h);P_SPINR(i),SBLOCK::P(B)
      • S(h);N_GUARD,P_SPINR(i),S_CUTQ(e)::R(G)
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).