MESON Chess Problem Database

Problem Display
PID: 170025 (B7/3N1Qpb/2n3p1/1Npr2p1/Kn2k3/5R2/6P1/b1B1r3 w - - 0 1)

Santiago, Joao Baptista

Enroque!!, 1946

B7/3N1Qpb/2n3p1/1Npr2p1/Kn2k3/5R2/6P1/b1B1r3

#2

8 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Red1
      • 2.Re3#
    • 1...Rf1
      • 2.Re3#
    • 1...Rg1
      • 2.Re3#
    • 1...Rh1
      • 2.Re3#
    • 1...Re3
      • 2.Rxe3#
    • 1...Rd4
      • 2.Qe6#
    • 1...Sd4
      • 2.Sd6#
    • 1...Se5
      • 2.Sxc5#
    • 1...g4
      • 2.Qf4#
  • Tries
    • 1.Sxc5+?
      • 1...Ke5
        • 2.Qe6#
        • 2.Qxg7#
      • 1...Rxc5!
    • 1.Qe6+?
      • 1...Re5
        • 2.Sxc5#
      • 1...Se5
        • 2.Sxc5#
      • 1...Be5!
  • Keys
    • 1.Rc3!
      • threat
        • 2.Qf3#
      • 1...Rxd7
        • 2.Qe6#
      • 1...Rf1
        • 2.Re3#
      • 1...Re3
        • 2.Rxe3#
      • 1...Rd3
        • 2.Qe6#
      • 1...Rf5
        • 2.Qc4#
      • 1...Sd4
        • 2.Sd6#
      • 1...Se5
        • 2.Sxc5#
      • 1...g4
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(b);N_GUARD::R1(C)
    • R(b);N_GUARD::R1(C),XR(b)
    • R(f);N_GUARD,P_SPINS(h),S_CUTB(a)::QAR2(G)
    • S(h);P_SPINR(f),SBLOCK::S(E)
    • S(h);P_SPINR(f),SBLOCK::S(F),XP(e)
    • P(g);N_GUARD::QAR1(G)
  • Tries
    • Try
      • S(F);CHECK,XP(e)
      • Refutation
        • R(f);P_SPINS(h),XS(F)
    • Try
      • Q(G);CHECK
      • Vars
        • R(f);P_SPINR(f),P_SPINS(h)::S(F),XP(e)
        • S(h);P_SPINR(f),P_SPINS(h)::S(F),XP(e)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • R(C);
    • Threat
      • QAB1(G)
    • Vars
      • R(f);N_GUARD,P_SPINS(h),XS(F)::QAR2(G)
      • R(b);N_GUARD::R1(C)
      • R(b);N_GUARD::R1(C),XR(b)
      • R(f);N_GUARD,P_SPINS(h)::QAR2(G)
      • R(f);OGATE,P_SPINS(h),SBLOCK::QAR2(G)
      • S(h);P_SPINR(f),SBLOCK::S(E)
      • S(h);P_SPINR(f),SBLOCK::S(F),XP(e)
      • P(g);N_GUARD::QAR1(G)
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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).