MESON Chess Problem Database

Problem Display
PID: 135229 (2K3n1/4p1r1/R1NN2B1/1p1kB3/1pR1p3/bp5Q/2Pr4/7b w - - 0 1)

Kirillov, Valery Afanasievich

Maslov, Boris Grigorevich

Pletenev, Nikolai Alexeyevich

Reeves, Alfred Christopher

The Problemist, 2009

2K3n1/4p1r1/R1NN2B1/1p1kB3/1pR1p3/bp5Q/2Pr4/7b

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rg2
      • 2.Bxe4#
  • Tries
    • 1.Sxb4+?
      • 1...Kxe5
        • 2.Qf5#
      • 1...Bxb4!
    • 1.Sd8?
      • threat
        • 2.Qe6#
      • 1...Kxe5
        • 2.Qf5#
      • 1...bxc4
        • 2.Ra5#
      • 1...e6
        • 2.Qxe6#
      • 1...Rxg6!
    • 1.Bf7+?
      • 1...e6
        • 2.Bxe6#
        • 2.Qxe6#
      • 1...Rxf7!
    • 1.Rd4+?
      • 1...Kc5
        • 2.Sb7#
      • 1...Rxd4!
    • 1.Qxb3?
      • threat
        • 2.Rc3#
      • 1...Ke6
        • 2.Rd4#
      • 1...bxc4
        • 2.Qxc4#
      • 1...Rd4!
  • Keys
    • 1.Sb7!
      • threat
        • 2.Rc5#
      • 1...Kxc4
        • 2.Qxb3#
      • 1...Rxc2
        • 2.Rd4#
      • 1...bxc4
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(b);S_CUTB(a)::B(H),XP(f)
  • Tries
    • Try
      • S(F);CHECK,XP(e)
      • Vars
        • K(h);P-FLIGHT,XB(D)::QAR1(B)
      • Refutation
        • B(c);XS(F)
    • Try
      • S(F);
      • Threat
        • QAB1(B)
      • Vars
        • K(h);OGATEB,P-FLIGHT,XB(D)::QAR1(B)
        • P(g);OGATEB,XR(C)::R(E)
        • P(i);::QAB1(B),XP(i)
      • Refutation
        • R(j);XB(H)
    • Try
      • B(H);CHECK
      • Refutation
        • R(j);XB(H)
    • Try
      • R(C);CHECK
      • Vars
        • K(h);P-FLIGHT::S(G)
      • Refutation
        • R(b);XR(C)
    • Try
      • Q(B);XP(d)
      • Threat
        • QAB(B)+R(C)
      • Vars
        • K(h);S_FLIGHT::QAB(B)+R(C)
        • P(g);OGATE,P_SPINP(g),XR(C)::QAB1(B),XP(g)
      • Refutation
        • R(b);
  • Actual
    • S(G);
    • Threat
      • R1(C)
    • Vars
      • K(h);OGATEB,S_FLIGHT,XR(C)::QAB1(B),XP(d)
      • R(b);N_GUARD,XP(A)::R1(C)
      • P(g);SBLOCK,XR(C)::QAR2(B)
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).