MESON Chess Problem Database

Problem Display
PID: 182318 (6B1/3p4/3PN2b/2p1p3/P1k1N2R/R3n2q/2pQPrr1/B1Kn1b2 w - - 0 1)

Gamage, Frederick

Les Tours de Force sur l'Echiquier, 1906

6B1/3p4/3PN2b/2p1p3/P1k1N2R/R3n2q/2pQPrr1/B1Kn1b2

#2

11 + 12

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sg4
      • 2.Sf4#
    • 1...Sf5
      • 2.S6g5#
      • 2.Sg7#
  • Tries
    • 1.Qc3+?
      • 1...Kd5
        • 2.Qxc5#
      • 1...Sxc3!
    • 1.Qxc2+?
      • 1...Kb4
        • 2.Qxc5#
      • 1...Kd5
        • 2.Qxc5#
      • 1...Sc3
        • 2.Qb3#
      • 1...Sxc2+!
    • 1.Qd5+?
      • 1...Kb4
        • 2.Qxc5#
      • 1...Sxd5+
        • 2.Sd2#
      • 1...Kxd5!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qxc5#
      • 1...Sg4+
        • 2.Sf4#
      • 1...Sd5+
        • 2.Sd2#
      • 1...Sf5+
        • 2.S6g5#
      • 1...Kd5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(f);N_GUARD,P_PINQ(C),S_CUTQ(g),S_CUTR(e)::B(K)+S(J)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(h);OGATE,S_FLIGHT::QAR1(C),XP(i)
      • Refutation
        • S(a);XQ(C)
    • Try
      • Q(C);CHECK,XP(c)
      • Vars
        • K(h);OGATE,P-FLIGHT::QAB1(C),XP(i)
        • K(h);OGATE,S_FLIGHT::QAR1(C),XP(i)
        • S(a);P_SPINS(a)::QAB1(C)
      • Refutation
        • S(f);CHECK,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(h);P-FLIGHT::QAB1(C),XP(i)
        • S(f);CHECK,SBLOCK,XQ(C)::R(H)+S(G),DCHECK
      • Refutation
        • K(h);S_FLIGHT,XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C),XP(i)
    • Vars
      • S(f);CHECK,N_GUARD,S_CUTQ(g),S_CUTR(e)::B(K)+S(J)
      • S(f);CHECK,SBLOCK::R(H)+S(G),DCHECK
      • S(f);CHECK,N_GUARD,S_CUTQ(g),S_CUTR(d)::B(K)+S(J)
      • K(h);P_SPINP(i),S_FLIGHT::QAR1(C),XP(i)
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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).