MESON Chess Problem Database

Problem Display
PID: 139475 (3N4/7b/q6p/5k1p/1R3P2/3P4/1B4Q1/1B3K2 w - - 0 1)

Ellerman, Arnoldo

Wiener Schachzeitung, 1926

3N4/7b/q6p/5k1p/1R3P2/3P4/1B4Q1/1B3K2

#2

8 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd3+
      • 2.Bxd3#
    • 1...Bg6
      • 2.Qh3#
  • Tries
    • 1.Rb5+?
      • 1...Kxf4
        • 2.Bc1#
      • 1...Qxb5!
    • 1.Qd5+?
      • 1...Kg6
        • 2.Qe4#
        • 2.Qf7#
      • 1...Kg4!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qxh5#
      • 1...Qxd3+
        • 2.Bxd3#
      • 1...Kg6
        • 2.Qe4#
      • 1...Qc4
        • 2.dxc4#
      • 1...Qf6
        • 2.d4#
      • 1...Qg6
        • 2.Rb5#
      • 1...Bg6
        • 2.Qh3#
      • 1...h4
        • 2.Qh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(c);CHECK,OGATE,P_SPINQ(c),XP(E)::B(A),XQ(c)
    • B(e);SBLOCK::QAB(D)
  • Tries
    • Try
      • R(F);CHECK,N_SPINP(E)
      • Vars
        • K(a);P-FLIGHT,XP(G)::B(C)
      • Refutation
        • Q(c);P_PINP(E),XR(F)
    • Try
      • Q(D);CHECK
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(D);
    • Threat
      • QAR2(D),XP(b)
    • Vars
      • Q(c);CHECK,OGATE,P_SPINQ(c),XP(E)::B(A),XQ(c)
      • K(a);S_FLIGHT::QAB(D)
      • Q(c);::B(A)+P(E),XQ(c)
      • Q(c);N_PINP(E),SBLOCK::B(A)+P(E)
      • Q(c);N_GUARD,N_PINP(E),SBLOCK::R(F)
      • B(e);SBLOCK::QAB(D)
      • P(b);::QAR2(D)
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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).