MESON Chess Problem Database

Problem Display
PID: 206120 (q1r5/4p3/B2NK3/7R/Rn1kPp2/p5p1/1n1P4/B3b2Q w - - 0 1)

Svitek, Miroslav

Tehtavaniekka, 2019

q1r5/4p3/B2NK3/7R/Rn1kPp2/p5p1/1n1P4/B3b2Q

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4+
      • 2.Qxe4#
    • 1...Qd5+
      • 2.Rxd5#
    • 1...Qxa6
      • 2.Rd5#
    • 1...Qa7
      • 2.Rd5#
    • 1...Qb8
      • 2.Rd5#
    • 1...Rc6
      • 2.Rd5#
    • 1...Rd8
      • 2.Rxb4#
    • 1...Re8
      • 2.Rxb4#
    • 1...Rf8
      • 2.Rxb4#
    • 1...Rg8
      • 2.Rxb4#
    • 1...Rh8
      • 2.Rxb4#
  • Tries
    • 1.Bxb2+?
      • 1...Rc3
        • 2.Bxc3#
        • 2.Rxb4#
      • 1...axb2!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qd3#
      • 1...Qxe4+
        • 2.Qxe4#
      • 1...Qd5+
        • 2.Rxd5#
      • 1...Qxa6
        • 2.Rd5#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Rc4
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(i);CHECK,OGATE,XP(E)::QAR1(B),XQ(i)
    • Q(i);CHECK,N_GUARD::R1(F),XQ(i)
    • Q(i);N_GUARD,P_PINS(H),XB(G)::R1(F)
    • Q(i);N_GUARD::R1(F)
    • R(j);P_PINS(H),S_CUTQ(i)::R1(F)
    • R(j);N_GUARD::R(D),XS(e)
  • Tries
    • Try
      • B(A);CHECK,P_PINS(e),XS(b)
      • Refutation
        • P(c);XB(A)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • Q(i);CHECK,OGATE,XP(E)::QAR1(B),XQ(i)
      • Q(i);CHECK,N_GUARD::R1(F),XQ(i)
      • Q(i);N_GUARD,P_PINS(H),XB(G)::R1(F)
      • R(j);N_GUARD,N_SPINS(b),P_SPINS(e)::QAB1(B),XR(j)
      • R(j);SBLOCK::S(H)
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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).