MESON Chess Problem Database

Problem Display
PID: 106242 (4r3/p1B1n2b/2p1QN2/2N1P1pP/K4krp/6nq/2p2PP1/8 w - - 0 1)

Voda, Josef

Lidova Demokracie, 1954

4r3/p1B1n2b/2p1QN2/2N1P1pP/K4krp/6nq/2p2PP1/8

#2

9 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg2
      • 2.Qxg4#
    • 1...Qh1
      • 2.Qxg4#
    • 1...Qh2
      • 2.Qxg4#
    • 1...Bd3
      • 2.Sxd3#
    • 1...Bg8
      • 2.Sd3#
    • 1...Sxh5
      • 2.Sxh5#
    • 1...Sf5
      • 2.Sd3#
    • 1...Sg6
      • 2.Sd3#
  • Tries
    • 1.Qf5+?
      • 1...Bxf5
        • 2.e6#
      • 1...Sgxf5
        • 2.Se6#
      • 1...Sexf5
        • 2.Sd3#
      • 1...Kxf5+!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Sd5#
      • 1...Kf5+
        • 2.Sfe4#
      • 1...Bf5
        • 2.e6#
      • 1...Sgf5
        • 2.Se6#
      • 1...Sd5
        • 2.Sxd5#
      • 1...Sef5
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • Q(c);N_GUARD,XP(B)::QAR1(G),XR(e)
    • Q(c);N_GUARD::QAR1(G),XR(e)
    • B(k);N_GUARD::S(D),XB(k)
    • B(k);N_GUARD::S(D)
    • S(b);XP(F)::S(H),XS(b)
    • S(j);S_CUTB(k)::S(D)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • B(k);SBLOCK,XQ(G)::B(I)+P(E)
        • S(b);SBLOCK,XQ(G)::S(D)
        • S(j);SBLOCK,XQ(G)::S(D)
      • Refutation
        • K(d);CHECK,P-FLIGHT,XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAR(G)+S(H),DCHECK
    • Vars
      • K(d);CHECK,P-FLIGHT::QAR(G)+S(H)
      • B(k);SBLOCK::B(I)+P(E)
      • S(b);SBLOCK::S(D)
      • S(j);::QAR(G)+S(H),DCHECK,XS(j)
      • S(j);SBLOCK,S_CUTB(k)::S(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).