MESON Chess Problem Database

Problem Display
PID: 177861 (8/2K2n1P/3Q2bp/1pp4r/Pp3PR1/1pk3bR/1N1p1rn1/BB6 w - - 0 1)

Pletenev, Nikolai Alexeyevich

4th Comm., Sahs (Latvia), 1982

8/2K2n1P/3Q2bp/1pp4r/Pp3PR1/1pk3bR/1N1p1rn1/BB6

#2

10 + 13

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxh3
      • 2.Qxc5#
    • 1...Rh4
      • 2.Qxc5#
    • 1...Rf5
      • 2.Qd3#
    • 1...Bd3
      • 2.Qxd3#
    • 1...Bf5
      • 2.Qxc5#
    • 1...Sg5
      • 2.Qxc5#
      • 2.Qe5#
      • 2.Qf6#
      • 2.h8Q#
      • 2.h8B#
    • 1...c4
      • 2.Sd1#
  • Tries
    • 1.h8Q+?
      • 1...Re5
        • 2.Qxc5#
      • 1...Se5
        • 2.Qxc5#
      • 1...Sxh8!
    • 1.h8B+?
      • 1...Re5
        • 2.Qxc5#
      • 1...Se5
        • 2.Qxc5#
      • 1...Sxh8!
  • Keys
    • 1.f5!
      • threat
        • 2.Sd1#
      • 1...d1Q
        • 2.Sxd1#
      • 1...d1S
        • 2.Sxd1#
      • 1...d1B
        • 2.Sxd1#
      • 1...d1R
        • 2.Sxd1#
      • 1...Rf4
        • 2.Qd3#
      • 1...Sf4
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 6
  • Sets
    • R(j);N_GUARD,N_SPINB(f),XR(D)::QAR2(H),XP(i)
    • R(j);N_GUARD::QAR2(H),XP(i)
    • R(j);S_CUTB(k)::QAR1(H)
    • B(k);N_GUARD,N_SPINB(f)::QAR1(H),XB(k)
    • B(k);S_CUTR(j)::QAR2(H),XP(i)
    • P(i);SBLOCK::B(A)+S(C),DCHECK
  • Tries
    • Try
      • P(J);CHECK
      • Vars
        • R(j);P_SPINR(j)::QAR2(H),XP(i)
        • S(m);P_SPINS(m)::QAR2(H),XP(i)
      • Refutation
        • S(m);XQ(J)
    • Try
      • P(J);CHECK
      • Vars
        • R(j);P_SPINR(j)::QAR2(H),XP(i)
        • S(m);P_SPINS(m)::QAR2(H),XP(i)
      • Refutation
        • S(m);XB(J)
  • Actual
    • P(F);P_SPINQ(H)
    • Threat
      • B(A)+S(C),DCHECK
    • Vars
      • P(a);::B(A)+S(C),DCHECK,XQ(a)
      • P(a);::B(A)+S(C),DCHECK,XS(a)
      • P(a);::B(A)+S(C),DCHECK,XB(a)
      • P(a);::B(A)+S(C),DCHECK,XR(a)
      • R(b);N_PINQ(H)::QAR1(H)
      • S(c);N_PINQ(H)::QAR2(H),XP(i)
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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).