MESON Chess Problem Database

Problem Display
PID: 266078 (4b3/4pB2/2N1P1n1/2N2R2/6kp/7p/2Q1pP1b/4K3 w - - 0 1)

Gamma, Alex

Schweizerische Schachzeitung, 2017

4b3/4pB2/2N1P1n1/2N2R2/6kp/7p/2Q1pP1b/4K3

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.Se5#
  • Tries
    • 1.Bxg6?
      • threat
        • 2.Qxe2#
      • 1...Bxc6
        • 2.Bh5#
      • 1...Bxg6!
    • 1.Rg5+?
      • 1...Kf3
        • 2.Qe4#
      • 1...Kf4
        • 2.Qf5#
      • 1...Kxg5!
    • 1.Qe4+?
      • 1...Sf4
        • 2.Se5#
      • 1...Bf4!
  • Keys
    • 1.Rh5!
      • threat
        • 2.Qf5#
      • 1...Kf3
        • 2.Qe4#
      • 1...Kf4
        • 2.Qe4#
        • 2.Qf5#
      • 1...Kxh5
        • 2.Qxg6#
      • 1...Bf4
        • 2.Qxe2#
      • 1...Sf4
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(f);N_GUARD,S_CUTB(b)::S(F)
  • Tries
    • Try
      • B(H);XS(f)
      • Threat
        • QAB(B),XP(a)
      • Vars
        • B(h);N_GUARD,XS(F)::B(H)
      • Refutation
        • B(h);XB(H)
    • Try
      • R(E);CHECK
      • Vars
        • K(d);N_GUARD,S_FLIGHT::QAB1(B)
        • K(d);P-FLIGHT::QAR1(B)
      • Refutation
        • K(d);P-FLIGHT,XR(E)
    • Try
      • Q(B);CHECK
      • Vars
        • S(f);P_SPINS(f)::S(F)
      • Refutation
        • B(b);P_SPINB(b)
  • Actual
    • R(E);
    • Threat
      • QAB1(B)
    • Vars
      • K(d);N_GUARD,S_CUTB(b),S_CUTS(f),S_FLIGHT::QAB1(B)
      • K(d);N_GUARD,P_SPINS(f),S_FLIGHT,XR(E)::QAB1(B),XS(f)
      • B(b);SBLOCK::QAB(B),XP(a)
      • S(f);N_GUARD,SBLOCK,S_CUTB(b)::S(F)
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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).