MESON Chess Problem Database

Problem Display
PID: 40499 (2RRB2B/b7/b4N2/2p2p2/rPk1N3/P1p2P2/2n2P2/nQ5K w - - 0 1)

Ellerman, Arnoldo

1st Prize, Arbejder-Skak, 1952

2RRB2B/b7/b4N2/2p2p2/rPk1N3/P1p2P2/2n2P2/nQ5K

#2

12 + 9

3105 FIDE Album (1945-1955) 1964

SOLUTION

  • SOUND
  • Sets
    • 1...Bb5
      • 2.Bf7#
    • 1...Bb8
      • 2.Rxc5#
    • 1...Sb3
      • 2.Qf1#
    • 1...Sd4
      • 2.Sd6#
  • Tries
    • 1.Sd6+?
      • 1...Kd3
        • 2.Qd1#
      • 1...Kd4!
    • 1.Sg4?
      • threat
        • 2.Se5#
      • 1...Bb8
        • 2.Rxc5#
      • 1...fxg4!
    • 1.Rd1?
      • threat
        • 2.Sd6#
      • 1...Bb8
        • 2.Rxc5#
      • 1...fxe4!
    • 1.Rd4+?
      • 1...Sxd4
        • 2.Sd6#
      • 1...Kxd4!
    • 1.Rd5?
      • threat
        • 2.Sd6#
      • 1...Bb8
        • 2.Rcxc5#
      • 1...fxe4!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Se5#
      • 1...Kd3
        • 2.Qf1#
      • 1...Kb5
        • 2.Sd6#
      • 1...Kd5
        • 2.Bf7#
      • 1...Bb8
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(h);SBLOCK::B(K)
    • B(i);N_GUARD::R1(I),XP(f)
    • S(a);SBLOCK::QAB(A)
    • S(b);SBLOCK::S(G)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(e);N_SPINP(f),P_SPINS(b),S_FLIGHT::QAR2(A)
      • Refutation
        • K(e);N_SPINP(f),P-FLIGHT
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • B(i);N_GUARD::R1(I),XP(f)
      • Refutation
        • P(g);XS(H)
    • Try
      • R(J);
      • Threat
        • S(G)
      • Vars
        • B(i);N_GUARD::R1(I),XP(f)
      • Refutation
        • P(g);XS(G)
    • Try
      • R(J);CHECK
      • Vars
        • S(b);SBLOCK,XR(J)::S(G)
      • Refutation
        • K(e);N_SPINP(f),P-FLIGHT,XR(J)
    • Try
      • R(J);
      • Threat
        • S(G)
      • Vars
        • B(i);N_GUARD::R1(I),XP(f)
      • Refutation
        • P(g);XS(G)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • K(e);N_SPINP(f),P_SPINS(b),S_FLIGHT::QAB(A)
      • K(e);N_SPINP(f),S_FLIGHT::S(G)
      • K(e);N_SPINP(f),S_FLIGHT::B(K)
      • B(i);N_GUARD::S(H)
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).