MESON Chess Problem Database

Problem Display
PID: 247150 (8/1qrP4/B2NK3/6R1/Rn1kP3/p7/1n1P2Qp/BN4b1 w - - 0 1)

Svitek, Miroslav

Sachmatija, 2021

8/1qrP4/B2NK3/6R1/Rn1kP3/p7/1n1P2Qp/BN4b1

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4+
      • 2.Qxe4#
    • 1...Qd5+
      • 2.Rxd5#
    • 1...Qxa6
      • 2.Rd5#
    • 1...Qc8
      • 2.Rd5#
    • 1...Qb6
      • 2.Rd5#
    • 1...Qa7
      • 2.Rd5#
    • 1...Qb8
      • 2.Rd5#
    • 1...Rc6
      • 2.Rd5#
    • 1...Bf2
      • 2.Qxf2#
    • 1...h1B
      • 2.Qxg1#
  • Tries
    • 1.Bxb2+?
      • 1...Rc3
        • 2.Bxc3#
      • 1...axb2!
    • 1.Rxb4+?
      • 1...Qxb4
        • 2.Rd5#
      • 1...Rc4!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qd3#
      • 1...Qxe4+
        • 2.Qxe4#
      • 1...Qd5+
        • 2.Rxd5#
      • 1...Qxa6
        • 2.Rd5#
      • 1...Rc4
        • 2.Qxc4#
      • 1...Qb5
        • 2.Sxb5#
      • 1...Rc3
        • 2.dxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • Q(g);CHECK,OGATE,XP(F)::QAR1(D),XQ(g)
    • Q(g);CHECK,N_GUARD::R1(G),XQ(g)
    • Q(g);N_GUARD,P_PINS(I),XB(H)::R1(G)
    • Q(g);N_GUARD,P_PINP(K)::R1(G)
    • Q(g);N_GUARD,P_PINS(I)::R1(G)
    • Q(g);N_GUARD::R1(G)
    • R(h);P_PINS(I),S_CUTQ(g)::R1(G)
    • B(a);N_GUARD::QAB(D),XB(a)
    • P(c);N_GUARD::QAB(D),XB(a)
  • Tries
    • Try
      • B(A);CHECK,P_PINS(e),XS(b)
      • Vars
        • R(h);N_GUARD,P_SPINR(h)::B(A),XR(h)
      • Refutation
        • P(d);XB(A)
    • Try
      • R(E);CHECK,XS(e)
      • Vars
        • Q(g);XR(E)::R1(G)
      • Refutation
        • R(h);P_SPINR(h)
  • Actual
    • Q(D);
    • Threat
      • QAR1(D)
    • Vars
      • Q(g);CHECK,OGATE,XP(F)::QAR1(D),XQ(g)
      • Q(g);CHECK,N_GUARD::R1(G),XQ(g)
      • Q(g);N_GUARD,P_PINS(I),XB(H)::R1(G)
      • R(h);N_GUARD::QAR1(D),XR(h)
      • Q(g);N_GUARD::S(I),XQ(g)
      • R(h);N_SPINS(b),OGATE,P_SPINS(e)::P(C),XR(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).