MESON Chess Problem Database

Problem Display
PID: 67305 (2BK3B/8/1pQ2N1p/Rn1NP3/3kp2r/n1p1prP1/2P1R3/3q4 w - - 0 1)

Robert, Philippe

1st Prize, diagrammes, 1982

2BK3B/8/1pQ2N1p/Rn1NP3/3kp2r/n1p1prP1/2P1R3/3q4

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Sg4#
    • 1...Sd6
      • 2.Qxc3#
    • 1...Sa7
      • 2.Qxc3#
    • 1...Sc7
      • 2.Qxc3#
  • Tries
    • 1.Sxe3?
      • threat
        • 2.Qd5#
      • 1...Kxe5+
        • 2.Sd7#
      • 1...Sc7
        • 2.Qxb6#
      • 1...Qxe2!
    • 1.Sxb6?
      • threat
        • 2.Qd5#
      • 1...Sc7
        • 2.Qc5#
      • 1...Kxe5+!
    • 1.Se7?
      • threat
        • 2.Qd5#
      • 1...Kxe5+
        • 2.Sd7#
      • 1...Sc7!
    • 1.Ra4+?
      • 1...Kxe5
        • 2.Sg4#
        • 2.Qe6#
      • 1...Sc4!
    • 1.Qxb6+?
      • 1...Kc4
        • 2.Ra4#
      • 1...Kxe5!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Qd5#
      • 1...Kxe5+
        • 2.S6d5#
      • 1...Sc7
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • K(f);P_PINS(E),S_FLIGHT,XP(F)::B(K)+S(H),DCHECK
    • S(i);N_GUARD::QAB1(G),XP(c)
  • Tries
    • Try
      • S(E);XP(d)
      • Threat
        • QAR1(G)
      • Vars
        • K(f);CHECK,P_SPINS(i),S_FLIGHT,XP(F)::B(K)+S(H),DCHECK
        • S(i);::QAB(G),XP(j)
      • Refutation
        • Q(a);XR(B)
    • Try
      • S(E);XP(j)
      • Threat
        • QAR1(G)
      • Vars
        • S(i);::QAB1(G)
      • Refutation
        • K(f);CHECK,P_SPINS(i),S_FLIGHT,XP(F)
    • Try
      • S(E);
      • Threat
        • QAR1(G)
      • Vars
        • K(f);CHECK,P_SPINS(i),S_FLIGHT,XP(F)::B(K)+S(H),DCHECK
      • Refutation
        • S(i);
    • Try
      • R(D);CHECK
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • Q(G);CHECK,XP(j)
      • Vars
        • K(f);P-FLIGHT,P_PINS(E)::R(D)
      • Refutation
        • K(f);P_PINS(E),S_FLIGHT,XP(F)
  • Actual
    • S(E);
    • Threat
      • QAR1(G)
    • Vars
      • K(f);CHECK,P_SPINS(i),S_FLIGHT,XP(F)::B(K)+S(H)
      • S(i);::QAR1(G),XP(g)
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).