MESON Chess Problem Database

Problem Display
PID: 110823 (bQNR1b2/B2npK2/p7/3k1p2/2p2pp1/1p3n2/N3P3/1q5B w - - 0 1)

Pituk, Alexander

Radio Ujsag, 1943

bQNR1b2/B2npK2/p7/3k1p2/2p2pp1/1p3n2/N3P3/1q5B

#2

8 + 13

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Sc3#
    • 1...Kc6
      • 2.Sb4#
    • 1...Qe4
      • 2.Sb4#
    • 1...Bc6
      • 2.Sc3#
    • 1...e5
      • 2.Qxa8#
  • Tries
    • 1.Sxe7+?
      • 1...Ke4
        • 2.Sc3#
      • 1...Bxe7!
    • 1.Bxf3+?
      • 1...Qe4
        • 2.Sb4#
      • 1...gxf3!
    • 1.Rxd7+?
      • 1...Ke4
        • 2.Sc3#
      • 1...Kc6!
    • 1.Qd6+?
      • 1...Ke4
        • 2.Sc3#
        • 2.Qd4#
      • 1...exd6!
    • 1.Qb5+?
      • 1...Ke4
        • 2.Sc3#
      • 1...axb5!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qe6#
      • 1...Ke4
        • 2.Qd4#
      • 1...Ke5
        • 2.Qe6#
      • 1...Qe4
        • 2.Qc5#
      • 1...Bc6
        • 2.Qd4#
      • 1...e5
        • 2.Sc3#
      • 1...e6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(g);S_FLIGHT::S(B)
    • Q(a);N_SPINS(c),P_SPINS(j),SBLOCK::S(B)
    • B(l);SBLOCK::S(B)
    • P(k);SBLOCK::QAB(F),XB(l)
  • Tries
    • Try
      • S(G);CHECK,XP(k)
      • Vars
        • K(g);S_FLIGHT::S(B)
      • Refutation
        • B(m);XS(G)
    • Try
      • B(A);CHECK,P_PINS(j),XS(c)
      • Vars
        • Q(a);P_SPINQ(a)::S(B)
      • Refutation
        • P(f);XB(A)
    • Try
      • R(H);CHECK,XS(j)
      • Vars
        • K(g);S_FLIGHT::S(B)
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Refutation
        • P(k);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(g);S_FLIGHT::S(B)
      • Refutation
        • P(i);XQ(F)
  • Actual
    • Q(F);
    • Threat
      • QAB1(F)
    • Vars
      • K(g);S_FLIGHT::QAR1(F)
      • K(g);N_SPINS(c),P-FLIGHT::QAR1(F)
      • Q(a);N_SPINS(c),P_SPINS(j),SBLOCK::QAR1(F)
      • B(l);SBLOCK::QAR1(F)
      • P(k);SBLOCK::S(B)
      • P(k);::QAB1(F),XP(k)
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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).