MESON Chess Problem Database

Problem Display
PID: 100973 (B1n2K2/1R2p3/r2P4/4pp2/N1PbkNp1/6P1/n1pPP1R1/1q3r1Q w - - 0 1)

Grabowski, Kazimierz

Good Companions (January), 1917

B1n2K2/1R2p3/r2P4/4pp2/N1PbkNp1/6P1/n1pPP1R1/1q3r1Q

#2

12 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Rg1#
    • 1...Rd1
      • 2.Rg1#
    • 1...Re1
      • 2.Rg1#
    • 1...Rg1
      • 2.Rxg1#
    • 1...Rb6
      • 2.Rxb6#
    • 1...exf4
      • 2.Rxe7#
  • Tries
    • 1.Rxb1+?
      • 1...Rc6
        • 2.Bxc6#
      • 1...Rxa8!
    • 1.Rb2+?
      • 1...Rc6
        • 2.Bxc6#
      • 1...Rxa8!
    • 1.Rb3+?
      • 1...Rc6
        • 2.Bxc6#
      • 1...Rxa8!
    • 1.Rb4+?
      • 1...Rc6
        • 2.Bxc6#
      • 1...Rxa8!
    • 1.Rb5+?
      • 1...Rc6
        • 2.Bxc6#
      • 1...Rxa8!
    • 1.Ra7+?
      • 1...Rc6
        • 2.Bxc6#
      • 1...Qb7!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sg5#
      • 1...f4
        • 2.Qh7#
      • 1...Ba1
        • 2.Sac5#
      • 1...Bg1
        • 2.Rf2#
      • 1...Bb2
        • 2.Sac5#
      • 1...Bf2
        • 2.Rg1#
      • 1...Bc3
        • 2.Sac5#
      • 1...Be3
        • 2.d3#
      • 1...Bc5
        • 2.Saxc5#
      • 1...Bb6
        • 2.Ra7#
      • 1...Ba7
        • 2.Rb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 6
  • Sets
    • R(b);N_GUARD::QAB(A)+R(D)
    • R(b);N_GUARD::QAB(A)+R(D),XR(b)
    • R(j);N_GUARD::B(K)+R(J),XR(j)
    • P(h);XS(H)::B(K)+R(J),DCHECK,XP(k)
  • Tries
    • Try
      • R(J);CHECK,XQ(a)
      • Vars
        • R(j);N_GUARD,P_SPINR(j)::B(K),XR(j)
      • Refutation
        • R(j);XB(K)
    • Try
      • R(J);CHECK
      • Vars
        • R(j);N_GUARD,P_SPINR(j)::B(K),XR(j)
      • Refutation
        • R(j);XB(K)
    • Try
      • R(J);CHECK
      • Vars
        • R(j);N_GUARD,P_SPINR(j)::B(K),XR(j)
      • Refutation
        • R(j);XB(K)
    • Try
      • R(J);CHECK
      • Vars
        • R(j);N_GUARD,P_SPINR(j)::B(K),XR(j)
      • Refutation
        • R(j);XB(K)
    • Try
      • R(J);CHECK
      • Vars
        • R(j);N_GUARD,P_SPINR(j)::B(K),XR(j)
      • Refutation
        • R(j);XB(K)
    • Try
      • R(J);CHECK
      • Vars
        • R(j);N_GUARD,P_SPINR(j)::B(K),XR(j)
      • Refutation
        • Q(a);P_SPINQ(a)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • P(i);OGATEB::QAB(A)
      • B(e);N_GUARD::S(F)
      • B(e);S_CUTR(b)::QAB(A)+R(D)
      • B(e);SBLOCK::P(B)
      • B(e);N_GUARD::S(F),XB(e)
      • B(e);S_CUTQ(a),S_CUTR(j)::B(K)+R(J)
      • B(e);S_CUTR(j)::B(K)+R(J)
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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).