MESON Chess Problem Database

Problem Display
PID: 139393 (7k/4N1N1/3P2pK/6p1/6p1/5pP1/2qQ4/3b3R w - - 0 1)

Ellerman, Arnoldo

El Ajedrez Americano, 1931

7k/4N1N1/3P2pK/6p1/6p1/5pP1/2qQ4/3b3R

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qb3
      • 2.Kxg6#
    • 1...Qa4
      • 2.Kxg6#
    • 1...Qc1
      • 2.Kxg6#
    • 1...Qa2
      • 2.Kxg6#
    • 1...Qb2
      • 2.Kxg6#
    • 1...Qc3
      • 2.Kxg6#
    • 1...Qc4
      • 2.Kxg6#
    • 1...Qc5
      • 2.Kxg6#
    • 1...Qc6
      • 2.Kxg6#
    • 1...Qc7
      • 2.Kxg6#
    • 1...Qc8
      • 2.Kxg6#
  • Tries
    • 1.Sxg6+?
      • 1...Kg8
        • 2.Qd5#
      • 1...Qxg6+!
    • 1.Qd5?
      • threat
        • 2.Qg8#
      • 1...Qb3
        • 2.Kxg6#
        • 2.Sxg6#
      • 1...Qa2
        • 2.Sxg6#
      • 1...Qc4
        • 2.Kxg6#
        • 2.Sxg6#
      • 1...Qc8
        • 2.Kxg6#
        • 2.Sxg6#
      • 1...Qh2+!
  • Keys
    • 1.Qc3!
      • 1...Qh2+
        • 2.Sh5#
      • 1...Qxc3
        • 2.Kxg6#
      • 1...Qf5
        • 2.Sgxf5#
      • 1...Qb1
        • 2.Kxg5#
        • 2.Sgf5#
        • 2.Sh5#
        • 2.Se6#
        • 2.Se8#
        • 2.Qc8#
      • 1...Qb3
        • 2.Kxg5#
        • 2.Kxg6#
      • 1...Qd3
        • 2.Kxg5#
        • 2.Qc8#
      • 1...Qa4
        • 2.Kxg5#
        • 2.Kxg6#
      • 1...Qe4
        • 2.Kxg5#
        • 2.Qc8#
      • 1...Qc1
        • 2.Kxg6#
      • 1...Qa2
        • 2.Sgf5#
        • 2.Sh5#
        • 2.Se6#
        • 2.Se8#
      • 1...Qb2
        • 2.Qc8#
      • 1...Qd2
        • 2.Qc8#
      • 1...Qe2
        • 2.Qc8#
      • 1...Qf2
        • 2.Qc8#
      • 1...Qg2
        • 2.Sgf5#
        • 2.Sh5#
        • 2.Se6#
        • 2.Se8#
        • 2.Qc8#
      • 1...Be2
        • 2.Kxg5#
      • 1...f2
        • 2.Kxg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 8
  • Sets
    • Q(b);::R(A)+K(E),XP(f)
  • Tries
    • Try
      • S(F);CHECK,XP(f)
      • Vars
        • K(g);P-FLIGHT::QAB(B)
      • Refutation
        • Q(b);CHECK,XS(F)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • Q(b);N_GUARD::S(F),XP(f)
      • Refutation
        • Q(b);CHECK
  • Actual
    • Q(B);
    • Vars
      • Q(b);CHECK,N_GUARD::QAB(B)+S(G)
      • Q(b);XQ(B)::R(A)+K(E),XP(f)
      • Q(b);N_GUARD::QAB(B)+S(G),XQ(b)
      • Q(b);::R(A)+K(E),XP(f)
      • Q(b);N_GUARD::QAR(B)
      • B(a);S_CUTQ(b)::R(A)+K(E),XP(e)
      • P(c);S_CUTQ(b)::R(A)+K(E),XP(e)
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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).