MESON Chess Problem Database

Problem Display
PID: 172140 (3K4/4p3/4Q3/1bp5/Rr1k2p1/N1n1pP2/1nPrq3/B2R2N1 w - - 0 1)

Apro, Laszlo

Schackvarlden, 1936

3K4/4p3/4Q3/1bp5/Rr1k2p1/N1n1pP2/1nPrq3/B2R2N1

#2

9 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sbxd1
      • 2.Qe4#
    • 1...Sd3
      • 2.Sxb5#
      • 2.Qe4#
    • 1...Sbxa4
      • 2.Qe4#
    • 1...Sc4
      • 2.Sxe2#
      • 2.Qe4#
  • Tries
    • 1.Sxe2+?
      • 1...Sxe2
        • 2.Sxb5#
      • 1...Bxe2!
    • 1.Sxb5+?
      • 1...Sxb5
        • 2.Sxe2#
      • 1...Qxb5!
    • 1.Qd6+?
      • 1...Sd5
        • 2.Bxb2#
      • 1...exd6!
  • Keys
    • 1.f4!
      • threat
        • 2.Qe5#
      • 1...Sd3
        • 2.Sxb5#
      • 1...Sc4
        • 2.Sxe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(a);N_SPINR(b),P_SPINR(f),P_SPINS(d),XR(B)::QAR1(H)
    • S(a);P_SPINS(d),XR(G)::QAR1(H)
  • Tries
    • Try
      • S(C);CHECK,XQ(c)
      • Vars
        • S(d);P_SPINS(a),XS(C)::S(E),XB(i)
      • Refutation
        • B(i);XS(C)
    • Try
      • S(E);CHECK,XB(i)
      • Vars
        • S(d);P_SPINS(a),XS(E)::S(C),XQ(c)
      • Refutation
        • Q(c);XS(E)
    • Try
      • Q(H);CHECK
      • Vars
        • S(d);P_SPINS(a),S_CUTP(k)::B(A),XS(a)
      • Refutation
        • P(k);XQ(H)
  • Actual
    • P(F);
    • Threat
      • QAB1(H)
    • Vars
      • S(a);N_SPINR(b),P_SPINR(f),P_SPINS(d),S_CUTQ(c)::S(E),XB(i)
      • S(a);P_SPINS(d),S_CUTB(i)::S(C),XQ(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).