MESON Chess Problem Database

Problem Display
PID: 268495 (8/P1Rrpp1b/R1Q5/1p1P4/4k1P1/3r2P1/2B3K1/6BN w - - 0 1)

Stoyanov, Kiril N

Die Schwalbe, 1975

8/P1Rrpp1b/R1Q5/1p1P4/4k1P1/3r2P1/2B3K1/6BN

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5
      • 2.Rxe7#
    • 1...Rd8
      • 2.Rxe7#
    • 1...e5
      • 2.d6#
    • 1...f5
      • 2.Qe6#
    • 1...f6
      • 2.Qe6#
  • Tries
    • 1.Bxd3+?
      • 1...Kxd3
        • 2.Qc2#
      • 1...Ke5!
    • 1.Qc5?
      • threat
        • 2.Qd4#
      • 1...Rxd5
        • 2.Qe3#
      • 1...e5
        • 2.Sf2#
      • 1...Ke5!
    • 1.Qf6?
      • threat
        • 2.Qd4#
      • 1...Kxd5
        • 2.a8Q#
        • 2.a8B#
      • 1...Rxd5
        • 2.Qf4#
      • 1...e5
        • 2.Qf3#
      • 1...exf6!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qd4#
      • 1...Kxd5
        • 2.a8Q#
        • 2.a8B#
      • 1...Rxd5
        • 2.Qe1#
      • 1...e5
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • R(d);OGATE,XP(G)::R(K),XP(e)
    • R(d);OGATE::R(K),XP(e)
    • P(e);SBLOCK::QAB(I)+P(G)
    • P(f);N_GUARD::QAR2(I)
  • Tries
    • Try
      • B(C);CHECK,XR(a)
      • Vars
        • K(b);N_GUARD,S_FLIGHT,XB(C)::QAB1(I)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • R(d);SBLOCK,XP(G)::QAR1(I)
        • P(e);SBLOCK::S(B)
      • Refutation
        • K(b);N_SPINR(a),P-FLIGHT
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • K(b);N_SPINR(a),S_FLIGHT,XP(G)::P=Q
        • R(d);SBLOCK,XP(G)::QAR1(I)
        • P(e);SBLOCK::QAB1(I)
      • Refutation
        • P(e);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAR1(I)
    • Vars
      • K(b);N_SPINR(a),S_FLIGHT,XP(G)::P=Q
      • R(d);SBLOCK,XP(G)::QAR(I)
      • P(e);SBLOCK::QAB1(I),XR(a)
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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).