MESON Chess Problem Database

Problem Display
PID: 135027 (r3B3/2pqPQKn/3pR3/1p1kN2N/1Bp2p2/2PP4/5rb1/3R4 w - - 0 1)

Kirillov, Valery Afanasievich

Maslov, Boris Grigorevich

Probleemblad, 2009

r3B3/2pqPQKn/3pR3/1p1kN2N/1Bp2p2/2PP4/5rb1/3R4

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Bxc6#
    • 1...Qc8
      • 2.Bc6#
    • 1...Qxe7
      • 2.Bc6#
      • 2.Rxe7#
    • 1...Qd8
      • 2.Bc6#
    • 1...Rfa2
      • 2.Sxf4#
    • 1...Rb2
      • 2.Sxf4#
    • 1...Rc2
      • 2.Sxf4#
    • 1...Rd2
      • 2.Sxf4#
    • 1...Re2
      • 2.Sxf4#
    • 1...Bf3
      • 2.Sxf4#
    • 1...Be4
      • 2.dxc4#
    • 1...Sg5
      • 2.Sf6#
    • 1...Sf6
      • 2.Sxf6#
    • 1...Sf8
      • 2.Sf6#
    • 1...f3
      • 2.Sf4#
    • 1...dxe5
      • 2.Rd6#
  • Tries
    • 1.Re1?
      • threat
        • 2.Rxd6#
      • 1...Qxe6
        • 2.Bc6#
      • 1...dxe5
        • 2.R1xe5#
        • 2.Rd6#
      • 1...Re2
        • 2.Sxf4#
      • 1...Be4
        • 2.dxe4#
      • 1...c5!
    • 1.Rf6+?
      • 1...Qe6
        • 2.Qxe6#
      • 1...Kxe5!
    • 1.Rg6+?
      • 1...Qe6
        • 2.Qxe6#
      • 1...Kxe5!
    • 1.Rh6+?
      • 1...Qe6
        • 2.Qxe6#
      • 1...Kxe5!
  • Keys
    • 1.Qf5!
      • threat
        • 2.dxc4#
      • 1...Qxe7+
        • 2.Sf7#
      • 1...cxd3
        • 2.Rxd3#
      • 1...dxe5
        • 2.Qxe5#
      • 1...Rd2
        • 2.Sxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 13
  • Sets
    • Q(i);OGATE::B(K),XQ(i)
    • Q(i);OGATE::B(K)
    • R(a);N_GUARD::S(F),XP(d)
    • B(b);S_CUTR(a)::S(F),XP(d)
    • B(b);SBLOCK::R(A)+P(C)DCHECK,XP(c)
    • S(j);N_GUARD::S(F)
    • S(j);N_GUARD::S(F),XS(j)
    • P(d);S_CUTR(a)::S(F)
    • P(g);SBLOCK,XS(E)::QAB(I)+R(G),DCHECK
  • Tries
    • Try
      • R(A);
      • Threat
        • QAB(I)+R(G),DCHECK,XP(g)
      • Vars
        • Q(i);OGATE,P_SPINQ(i),XR(G)::B(K)
        • R(a);N_GUARD::S(F),XP(d)
        • B(b);OGATE::P(C),XB(b)
      • Refutation
        • P(h);
    • Try
      • R(G);CHECK
      • Vars
        • Q(i);N_GUARD,P_SPINQ(i)::QAB1(I),XQ(i)
      • Refutation
        • K(f);P-FLIGHT,XS(E)
    • Try
      • R(G);CHECK
      • Vars
        • Q(i);N_GUARD,P_SPINQ(i)::QAB1(I),XQ(i)
      • Refutation
        • K(f);P-FLIGHT,XS(E)
    • Try
      • R(G);CHECK
      • Vars
        • Q(i);N_GUARD,P_SPINQ(i)::QAB1(I),XQ(i)
      • Refutation
        • K(f);P-FLIGHT,XS(E)
  • Actual
    • Q(I);P_SPINP(H)
    • Threat
      • R(A)+P(C)DCHECK,XP(c)
    • Vars
      • Q(i);CHECK,XP(H)::QAR(I)+S(E)
      • P(c);OGATE,P_SPINP(c),XP(C)::R(A),XP(c)
      • P(g);OGATE,P_SPINP(g),XS(E)::QAR1(I),XP(g)
      • R(a);N_GUARD::S(F),XP(d)
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).