MESON Chess Problem Database

Problem Display
PID: 196888 (qbQ5/p7/8/4p1n1/4kn1R/1N3p2/2P5/rB3N1K w - - 0 1)

Villaret, Albert

Deutsches Wochenschach, 1919

qbQ5/p7/8/4p1n1/4kn1R/1N3p2/2P5/rB3N1K

#2

7 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.c4#
    • 1...Ra4
      • 2.c4#
    • 1...Ra5
      • 2.c4#
    • 1...Ra6
      • 2.c4#
  • Tries
    • 1.Sg3+?
      • 1...Ke3
        • 2.Qc5#
      • 1...Kd5!
    • 1.Sbd2+?
      • 1...Kd4
        • 2.Qc4#
      • 1...Kd5!
    • 1.Qc6+?
      • 1...Kf5
        • 2.Se3#
        • 2.Sg3#
      • 1...Qxc6!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Qd3#
      • 1...Kd5
        • 2.c4#
      • 1...Kf5
        • 2.Sg3#
      • 1...Rxa6
        • 2.c4#
      • 1...Qd5
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(a);N_GUARD::B(A)+P(D)
  • Tries
    • Try
      • S(B);CHECK,P_SPINB(A)
      • Vars
        • K(c);N_SPINS(d),P-FLIGHT::QAB(G)
      • Refutation
        • K(c);N_SPINS(d),S_FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(G)
      • Refutation
        • K(c);N_SPINS(d),S_FLIGHT
    • Try
      • Q(G);CHECK
      • Refutation
        • Q(h);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAB1(G)
    • Vars
      • K(c);N_SPINS(d),S_FLIGHT::P(D)
      • K(c);N_SPINS(d),S_FLIGHT::S(B)
      • R(a);N_GUARD,XQ(G)::B(A)+P(D)
      • Q(h);SBLOCK::QAB(G)
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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).