MESON Chess Problem Database

Problem Display
PID: 87863 (1B1n4/4Np2/3P3R/1K1Pk1p1/4N2p/bp6/1qpP2Q1/7B w - - 0 1)

Tura, Waldemar

Problemista, 1969

1B1n4/4Np2/3P3R/1K1Pk1p1/4N2p/bp6/1qpP2Q1/7B

#2

10 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qxg5#
    • 1...Qd4
      • 2.Qh2#
  • Tries
    • 1.Sc5?
      • threat
        • 2.Qe4#
      • 1...Kd4
        • 2.Qe4#
      • 1...Kf4
        • 2.Sd3#
      • 1...Qd4
        • 2.d7#
      • 1...f5!
    • 1.Sc6+?
      • 1...Kf4
        • 2.Qf3#
        • 2.Qxg5#
      • 1...Kxd5
        • 2.Sf2#
        • 2.Sc3#
        • 2.Sg3#
        • 2.Sc5#
        • 2.Sxg5#
      • 1...Kf5
        • 2.Qf3#
        • 2.Qxg5#
      • 1...Sxc6!
    • 1.Qf2?
      • threat
        • 2.Qf6#
      • 1...f6
        • 2.Qxf6#
      • 1...f5!
    • 1.d4+?
      • 1...Kf4
        • 2.Qf3#
        • 2.Qxg5#
      • 1...Qxd4
        • 2.Qh2#
      • 1...Kxd4!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Qe4#
      • 1...Kd4
        • 2.Qe4#
      • 1...Kf4
        • 2.Qh2#
      • 1...Qd4
        • 2.Qxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(f);S_FLIGHT::QAB1(C),XP(g)
    • Q(a);SBLOCK::QAB(C)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR1(C)
      • Vars
        • K(f);S_FLIGHT::QAR1(C)
        • K(f);S_FLIGHT::S(D)
        • Q(a);SBLOCK::B(J)+P(G)
      • Refutation
        • P(h);
    • Try
      • S(I);CHECK
      • Refutation
        • S(i);XS(I)
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • P(h);::QAB1(C),XP(h)
      • Refutation
        • P(h);
    • Try
      • P(B);CHECK
      • Vars
        • Q(a);SBLOCK,XP(B)::QAB(C)
      • Refutation
        • K(f);S_FLIGHT,XP(B)
  • Actual
    • S(D);
    • Threat
      • QAR1(C)
    • Vars
      • K(f);S_FLIGHT::QAR1(C)
      • K(f);S_FLIGHT::QAB(C)
      • Q(a);SBLOCK::QAR2(C),XP(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).