MESON Chess Problem Database

Problem Display
PID: 206366 (k1B5/4R1n1/8/2p5/Pp1p2K1/5RB1/r4p2/3b3Q w - - 0 1)

Ellerman, Arnoldo

3rd HM., L'Italia Scacchistica, 1925

k1B5/4R1n1/8/2p5/Pp1p2K1/5RB1/r4p2/3b3Q

#2

7 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Re2
      • 2.Rfe3#
    • 1...Bc2
      • 2.Rd3#
    • 1...Bb3
      • 2.Rxb3#
    • 1...Bxf3+
      • 2.Qxf3#
    • 1...Bxa4
      • 2.Ra3#
  • Tries
    • 1.Be6?
      • threat
        • 2.Bd5#
      • 1...Bxf3+
        • 2.Qxf3#
      • 1...Bxa4
        • 2.Ra3#
        • 2.Rf8#
      • 1...Bb3
        • 2.Rxb3#
        • 2.Rf8#
      • 1...Sxe6!
  • Keys
    • 1.Bf5!
      • threat
        • 2.Be4#
      • 1...Bxf3+
        • 2.Qxf3#
      • 1...Bxa4
        • 2.Ra3#
      • 1...Sxf5
        • 2.Qh8#
      • 1...Re2
        • 2.Rfe3#
      • 1...Bc2
        • 2.Rd3#
      • 1...Bb3
        • 2.Rxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(b);N_PINR(B)::QAB(A)+R(B)
    • B(a);N_PINR(B)::QAB(A)+R(B)
    • B(a);N_PINR(B)::QAB(A)+R(B),XB(a)
    • B(a);CHECK,OGATE,P_SPINB(a),XR(B)::QAB(A),XB(a)
    • B(a);N_PINR(B),XP(D)::QAB(A)+R(B)
  • Tries
    • Try
      • B(G);
      • Threat
        • B(G)
      • Vars
        • B(a);CHECK,OGATE,P_SPINB(a),XR(B)::QAB(A),XB(a)
      • Refutation
        • S(g);XB(G)
  • Actual
    • B(G);
    • Threat
      • B(G)
    • Vars
      • B(a);CHECK,OGATE,P_SPINB(a),XR(B)::QAB(A),XB(a)
      • B(a);N_PINR(B),XP(D)::QAB(A)+R(B)
      • S(g);N_GUARD,XB(G)::QAB1(A)
      • R(b);N_PINR(B)::QAB(A)+R(B)
      • B(a);N_PINR(B)::QAB(A)+R(B)
      • B(a);N_PINR(B)::QAB(A)+R(B),XB(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).