MESON Chess Problem Database

Problem Display
PID: 239065 (3r1r2/5P2/1P3B2/1N1k1P1N/1pR2P2/3P3K/1qn4n/Q1R5 w - - 0 1)

Alaikov, Venelin

Variantim, 2006

3r1r2/5P2/1P3B2/1N1k1P1N/1pR2P2/3P3K/1qn4n/Q1R5

#2

12 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc1
      • 2.Qe5#
    • 1...Qa3
      • 2.Qe5#
    • 1...Qe5
      • 2.Qxe5#
    • 1...Qxf6
      • 2.Sxf6#
    • 1...Qb1
      • 2.Qe5#
    • 1...Qa2
      • 2.Qe5#
    • 1...Qb3
      • 2.Qe5#
    • 1...Rd6
      • 2.Sc7#
    • 1...Sxa1
      • 2.Rc5#
    • 1...Se1
      • 2.Rc5#
    • 1...Sa3
      • 2.Rc5#
    • 1...Se3
      • 2.Rc5#
    • 1...Sd4
      • 2.Rc5#
  • Tries
    • 1.Bd4?
      • threat
        • 2.Sf6#
        • 2.Rc5#
      • 1...Rxf7
        • 2.Rc5#
      • 1...Qc3
        • 2.Sf6#
      • 1...Rd6
        • 2.Sc7#
        • 2.Rc5#
      • 1...Rc8
        • 2.Sf6#
      • 1...Rh8
        • 2.Rc5#
      • 1...Sg4
        • 2.Rc5#
      • 1...Qxd4!
    • 1.Be5?
      • threat
        • 2.Sc7#
        • 2.Sf6#
      • 1...Qxe5
        • 2.Qxe5#
      • 1...Rd6
        • 2.Sc7#
      • 1...Rd7
        • 2.Sf6#
      • 1...Rc8
        • 2.Sf6#
      • 1...Rh8
        • 2.Sc7#
      • 1...Sg4
        • 2.Sc7#
      • 1...Rxf7!
    • 1.Be7?
      • threat
        • 2.Sc7#
        • 2.Rc5#
      • 1...Qc3
        • 2.Sc7#
      • 1...Qd4
        • 2.Sc7#
      • 1...Qe5
        • 2.Rc5#
        • 2.Qxe5#
      • 1...Rd6
        • 2.Sc7#
      • 1...Rd7
        • 2.Rc5#
      • 1...Rc8!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Qb7#
      • 1...Qxf6
        • 2.Sxf6#
      • 1...Rxf7
        • 2.Qxf7#
      • 1...Rc8
        • 2.Qd7#
      • 1...Rd6
        • 2.Sc7#
      • 1...Rd7
        • 2.Qxd7#
      • 1...Rb8
        • 2.Qd7#
      • 1...Sd4
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 10
  • Sets
    • Q(a);OGATE,XR(B)::QAR1(A)
    • Q(a);OGATE,P_PINP(C)::QAR1(A)
    • Q(a);OGATE::QAR1(A),XQ(a)
    • Q(a);XB(K)::S(I),XQ(a)
    • Q(a);OGATE::QAR1(A)
    • R(f);SBLOCK::S(G)
    • S(b);XQ(A)::R1(E)
    • S(b);::R1(E)
  • Tries
    • Try
      • B(K);
      • Threat
        • DUALS(2)
      • Vars
        • R(g);XP(L)::R1(E)
        • Q(a);P_PINP(C)::S(I)
        • R(f);::S(I)
        • R(g);P_PINS(I)::R1(E)
        • S(c);::R1(E)
      • Refutation
        • Q(a);XB(K)
    • Try
      • B(K);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);OGATE,XB(K)::QAR1(A),XQ(a)
        • R(f);::S(G)
        • R(f);::S(I)
        • R(g);P_PINS(I)::S(G)
        • S(c);::S(G)
      • Refutation
        • R(g);XP(L)
    • Try
      • B(K);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);P_PINP(C)::S(G)
        • Q(a);::S(G)
        • R(f);::S(G)
        • R(f);::R1(E)
      • Refutation
        • R(f);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • Q(a);XB(K)::S(I),XQ(a)
      • R(g);OGATE,XP(L)::QAB(A),XR(g)
      • R(f);N_GUARD::QAR2(A)
      • R(f);SBLOCK::S(G)
      • R(f);N_GUARD::QAR2(A),XR(f)
      • S(b);::R1(E)
HTML5 logo

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).