MESON Chess Problem Database

Problem Display
PID: 142865 (8/8/4N3/4p3/4k3/2r1N1r1/2P1RKP1/1B4Q1 w - - 0 1)

Boxo, Eugenio

HM., Sports Referee, 1932

8/8/4N3/4p3/4k3/2r1N1r1/2P1RKP1/1B4Q1

#2

8 + 4

274 diagrammes 1973

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc2
      • 2.Bxc2#
    • 1...Ra3
      • 2.c3#
    • 1...Rb3
      • 2.cxb3#
    • 1...Rd3
      • 2.cxd3#
    • 1...Rcxe3
      • 2.c4#
    • 1...Rc4
      • 2.c3#
    • 1...Rc5
      • 2.c3#
      • 2.c4#
    • 1...Rc6
      • 2.c3#
      • 2.c4#
    • 1...Rc7
      • 2.c3#
      • 2.c4#
    • 1...Rc8
      • 2.c3#
      • 2.c4#
    • 1...Rxg2+
      • 2.Qxg2#
    • 1...Rf3+
      • 2.gxf3#
  • Tries
    • 1.Kxg3?
      • 1...Rxc2
        • 2.Bxc2#
      • 1...Ra3
        • 2.c3#
      • 1...Rb3
        • 2.cxb3#
      • 1...Rd3
        • 2.cxd3#
      • 1...Rc4
        • 2.c3#
      • 1...Rc5
        • 2.c3#
        • 2.c4#
      • 1...Rc6
        • 2.c3#
        • 2.c4#
      • 1...Rc7
        • 2.c3#
        • 2.c4#
      • 1...Rc8
        • 2.c3#
        • 2.c4#
      • 1...Rxe3+!
  • Keys
    • 1.Qh1!
      • 1...Rxg2+
        • 2.Qxg2#
      • 1...Rf3+
        • 2.gxf3#
      • 1...Rxc2
        • 2.Bxc2#
      • 1...Rcxe3
        • 2.c4#
      • 1...Rgxe3
        • 2.g4#
      • 1...Rh3
        • 2.gxh3#
      • 1...Ra3
        • 2.c3#
      • 1...Rb3
        • 2.cxb3#
      • 1...Rd3
        • 2.cxd3#
      • 1...Rc4
        • 2.c3#
      • 1...Rc5
        • 2.c3#
        • 2.c4#
      • 1...Rc6
        • 2.c3#
        • 2.c4#
      • 1...Rc7
        • 2.c3#
        • 2.c4#
      • 1...Rc8
        • 2.c3#
        • 2.c4#
      • 1...Rg4
        • 2.g3#
      • 1...Rg5
        • 2.g3#
        • 2.g4#
      • 1...Rg6
        • 2.g3#
        • 2.g4#
      • 1...Rg7
        • 2.g3#
        • 2.g4#
      • 1...Rg8
        • 2.g3#
        • 2.g4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE,P_PINR(D),P_SPINR(a),XP(C)::B(A),XR(a)
    • R(a);OGATE::B(A)+P(C)
    • R(a);OGATE::B(A)+P(C),XR(a)
    • R(a);OGATE::P(C),XR(a)
    • R(a);OGATE,P_SPINR(a),XS(G)::B(A)+P(C)
    • R(b);CHECK,OGATE,XP(F)::QAB(B),XR(b)
    • R(b);CHECK,OGATE::P(F),XR(b)
  • Tries
    • Try
      • K(E);P_SPINS(G),S_FLIGHT,XR(b)
      • Vars
        • R(a);N_PINS(G),OGATE,P_SPINR(a),XP(C)::B(A),XR(a)
        • R(a);OGATE::B(A)+P(C)
        • R(a);OGATE::B(A)+P(C),XR(a)
        • R(a);OGATE::P(C),XR(a)
        • R(a);N_PINS(G),OGATE::B(A)+P(C)
      • Refutation
        • R(a);CHECK,P_SPINR(a),XS(G)
  • Actual
    • Q(B);
    • Vars
      • R(b);CHECK,OGATE,P_SPINR(b),XP(F)::QAB(B),XR(b)
      • R(b);CHECK,OGATE::P(F),XR(b)
      • R(a);OGATE,P_PINR(D),P_SPINR(a),XP(C)::B(A),XR(a)
      • R(a);OGATE,P_SPINR(a),XS(G)::B(A)+P(C)
      • R(b);OGATE,P_SPINR(b),XS(G)::QAB(B)+P(F)
      • R(b);OGATE::QAB(B)+P(F),XR(b)
      • R(a);OGATE::B(A)+P(C)
      • R(a);OGATE::B(A)+P(C),XR(a)
      • R(a);OGATE::P(C),XR(a)
      • R(b);OGATE::QAB(B)+P(F)
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).