MESON Chess Problem Database

Problem Display
PID: 21102 (1B3N2/3p4/Np5p/bK1k4/5PRn/4P1r1/1n3rR1/1Q5B w - - 0 1)

Paluzie y Lucena, Jozefo

3rd HM., Good Companions (May), 1916

1B3N2/3p4/Np5p/bK1k4/5PRn/4P1r1/1n3rR1/1Q5B

#2

10 + 9

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Rd2#
    • 1...Rc2
      • 2.Rd2#
    • 1...Rd2
      • 2.Rxd2#
    • 1...Rxf4
      • 2.Rd2#
    • 1...Bb4
      • 2.Sxb4#
    • 1...Sd1
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sa4
      • 2.Qd3#
    • 1...Sc4
      • 2.Qd3#
    • 1...Sxg2
      • 2.Qf5#
    • 1...Sf5
      • 2.Qxf5#
    • 1...d6
      • 2.Sc7#
  • Tries
    • 1.Be5?
      • threat
        • 2.Sc7#
        • 2.e4#
      • 1...Rxe3
        • 2.Sc7#
      • 1...Rc2
        • 2.Rd2#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Re2
        • 2.Sc7#
      • 1...Rxf4!
    • 1.Rg5+?
      • 1...Rxg5
        • 2.Rxg5#
      • 1...Sf5
        • 2.Rxf5#
        • 2.Qxf5#
      • 1...hxg5!
    • 1.Rg6?
      • threat
        • 2.Sc7#
        • 2.Rd6#
      • 1...Rxf4
        • 2.Rd2#
      • 1...Rxe3
        • 2.Rd6#
      • 1...Rxg6
        • 2.Rg5#
      • 1...Rc2
        • 2.Rd2#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Bb4
        • 2.Sxb4#
        • 2.Sc7#
      • 1...Sc4
        • 2.Sc7#
        • 2.Qd3#
      • 1...Sf5
        • 2.Sc7#
        • 2.Qxf5#
      • 1...d6
        • 2.Sc7#
        • 2.Rxd6#
      • 1...Sxg6!
    • 1.Qa2+?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Ke4!
  • Keys
    • 1.Rg7!
      • threat
        • 2.Rxd7#
      • 1...Rxg7
        • 2.Rg5#
      • 1...Rc2
        • 2.Rd2#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Rg6
        • 2.Rg5#
      • 1...Bb4
        • 2.Sxb4#
      • 1...Sc4
        • 2.Qd3#
      • 1...Sf5
        • 2.Qxf5#
      • 1...d6
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(b);OGATE::B(B)+R(C),DCHECK
    • R(b);OGATE::B(B)+R(C),DCHECK,XR(b)
    • R(b);OGATE,XP(E)::B(B)+R(C),DCHECK
    • B(e);N_GUARD::S(H),XB(e)
    • S(a);N_GUARD::QAR2(A)
    • S(a);N_GUARD::QAR2(A),XS(a)
    • S(d);N_GUARD,P_SPINS(d),XR(C)::QAR2(A)
    • S(d);N_GUARD::QAR2(A),XS(d)
    • P(i);SBLOCK::S(H)
  • Tries
    • Try
      • B(I);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);XP(D)::S(H)
        • R(b);OGATE::B(B)+R(C),DCHECK
        • S(a);N_GUARD::QAR2(A),XS(a)
        • R(b);::S(H)
      • Refutation
        • R(b);XP(E)
    • Try
      • R(F);CHECK
      • Vars
        • R(c);OGATE,XR(F)::B(B)+R(C),DCHECK,XR(c)
      • Refutation
        • P(h);XR(F)
    • Try
      • R(F);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);OGATE,XP(E)::B(B)+R(C),DCHECK
        • R(c);XP(D)::R1(F)
        • R(c);OGATE,XR(F)::B(B)+R(C),DCHECK
        • R(b);OGATE::B(B)+R(C),DCHECK
        • S(a);N_GUARD::QAR2(A),XS(a)
      • Refutation
        • S(d);XR(F)
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(A),XS(a)
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • R(F);
    • Threat
      • R(F),XP(i)
    • Vars
      • R(c);OGATE,XR(F)::B(B)+R(C),DCHECK
      • R(b);OGATE::B(B)+R(C),DCHECK
      • S(a);N_GUARD::QAR2(A),XS(a)
      • R(c);OGATE::B(B)+R(C),DCHECK
      • B(e);N_GUARD::S(H),XB(e)
      • S(a);N_GUARD::QAR2(A)
      • S(d);N_GUARD::QAR2(A),XS(d)
      • P(i);SBLOCK::S(H)
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).