MESON Chess Problem Database

Problem Display
PID: 61688 (1b6/1B1KnN2/1p2Ppp1/3n3b/r4kPp/2pQ4/2Nr1P2/2B3R1 w - - 0 1)

Gavrilov, Constantin Grigorievich

La Strategie, 1936

1b6/1B1KnN2/1p2Ppp1/3n3b/r4kPp/2pQ4/2Nr1P2/2B3R1

#2

10 + 12

371 The Chess Review 1936

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.fxe3#
    • 1...Sb4
      • 2.Qd4#
    • 1...Sc7
      • 2.Qd6#
  • Tries
    • 1.Bxd2+?
      • 1...Se3
        • 2.Bxe3#
        • 2.Qxe3#
        • 2.fxe3#
      • 1...cxd2!
    • 1.Qxd2+?
      • 1...Kf3
        • 2.Qe3#
      • 1...Ke4
        • 2.Qe3#
        • 2.Qe2#
      • 1...Se3
        • 2.Qxe3#
        • 2.fxe3#
      • 1...cxd2!
    • 1.Qg3+?
      • 1...Ke4
        • 2.Qe3#
      • 1...hxg3!
    • 1.Qd4+?
      • 1...Kf3
        • 2.Qe3#
      • 1...Rxd4!
  • Keys
    • 1.Se1!
      • threat
        • 2.Qf3#
      • 1...Bxg4
        • 2.Sg2#
      • 1...Se3
        • 2.fxe3#
      • 1...Sb4
        • 2.Qd4#
      • 1...Sc7
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(f);N_SPINR(a),OGATE,P_PINQ(E)::P(D),XS(f)
    • S(f);P_PINQ(E),S_CUTR(c)::QAR2(E)
    • S(f);OGATE,P_PINQ(E)::QAB(E)
  • Tries
    • Try
      • B(A);CHECK,XR(a)
      • Refutation
        • P(b);XB(A)
    • Try
      • Q(E);CHECK,XR(a)
      • Vars
        • K(d);P-FLIGHT,P_SPINS(f)::QAR1(E)
      • Refutation
        • P(b);P_SPINP(b),XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(d);N_SPINR(a),P-FLIGHT,P_SPINS(f)::QAR1(E)
      • Refutation
        • P(e);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(d);N_SPINR(a),P-FLIGHT,P_SPINS(f)::QAR1(E)
      • Refutation
        • R(c);XQ(E)
  • Actual
    • S(C);
    • Threat
      • QAR1(E)
    • Vars
      • B(g);P_PINP(G),SBLOCK,XP(F)::S(C)
      • S(f);N_SPINR(a),OGATE,P_PINQ(E)::P(D),XS(f)
      • S(f);P_PINQ(E),S_CUTR(c)::QAR2(E)
      • S(f);OGATE,P_PINQ(E)::QAB(E)
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).