MESON Chess Problem Database

Problem Display
PID: 101283 (5nR1/1b2N2Q/4prq1/1N2p3/2P1k2p/6PK/1p2PP2/2B5 w - - 0 1)

Weiss, Berthold

Good Companions (April), 1917

5nR1/1b2N2Q/4prq1/1N2p3/2P1k2p/6PK/1p2PP2/2B5

#2

10 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5+
      • 2.Rg4#
  • Tries
    • 1.Sc6?
      • threat
        • 2.Sd6#
      • 1...Qf5+
        • 2.Rg4#
      • 1...Kf5
        • 2.Sd6#
      • 1...Bxc6!
    • 1.Sc8?
      • threat
        • 2.Scd6#
      • 1...Qf5+
        • 2.Rg4#
      • 1...Kf5
        • 2.Sbd6#
        • 2.Scd6#
      • 1...Bxc8!
    • 1.Be3?
      • threat
        • 2.Sc3#
        • 2.Sd6#
      • 1...Qf5+
        • 2.Rg4#
      • 1...b1S
        • 2.Sd6#
      • 1...Rxf2!
    • 1.Qxg6+?
      • 1...Rf5
        • 2.f3#
      • 1...Rxg6
        • 2.f3#
      • 1...Sxg6!
    • 1.Qxh4+?
      • 1...Rf4
        • 2.f3#
      • 1...Qg4+!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Sbd6#
        • 2.Sfd6#
      • 1...Qxf5+
        • 2.Rg4#
      • 1...Qxg3+
        • 2.Sxg3#
      • 1...Qg4+
        • 2.Rxg4#
      • 1...Kxf5
        • 2.Sd6#
      • 1...Rxf5
        • 2.Qxb7#
      • 1...exf5
        • 2.f3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(g);CHECK,OGATE::R(J)
  • Tries
    • Try
      • S(H);
      • Threat
        • S(G)
      • Vars
        • Q(g);CHECK,OGATE::R(J)
        • K(b);S_FLIGHT::S(G)
      • Refutation
        • B(h);XS(H)
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • Q(g);CHECK,OGATE::R(J)
      • Refutation
        • B(h);XS(H)
    • Try
      • B(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);CHECK,OGATE::R(J)
        • P(a);::S(G)
      • Refutation
        • R(f);XP(C)
    • Try
      • Q(I);CHECK,XQ(g)
      • Vars
        • R(f);P_SPINR(f)::P(C)
        • R(f);XQ(I)::P(C)
      • Refutation
        • S(i);XQ(I)
    • Try
      • Q(I);CHECK,N_PINQ(g),XP(c)
      • Vars
        • R(f);P_SPINR(f)::P(C)
      • Refutation
        • Q(g);CHECK,P_SPINQ(g)
  • Actual
    • S(H);N_PINQ(g)
    • Threat
      • DUALS(2)
    • Vars
      • Q(g);CHECK,OGATE,P_SPINQ(g),XS(H)::R(J)
      • Q(g);CHECK,XP(D)::QAB(I)+S(H),DCHECK,XQ(g)
      • Q(g);CHECK,OGATE::R(J),XQ(g)
      • K(b);P_SPINQ(g),S_FLIGHT,XS(H)::S(G)
      • R(f);SBLOCK,XS(H)::QAB(I),XB(h)
      • P(e);SBLOCK,XS(H)::P(C)
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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).