MESON Chess Problem Database

Problem Display
PID: 270692 (7B/2N5/7b/3Br2r/KP1k2p1/n2P2R1/3nPP2/3NQb2 w - - 0 1)

Vasilenko, Anatoly Grigorovich

Die Schwalbe, 2023

7B/2N5/7b/3Br2r/KP1k2p1/n2P2R1/3nPP2/3NQb2

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Be3
      • 2.fxe3#
    • 1...Sb3
      • 2.Qc3#
    • 1...Sf3
      • 2.Qc3#
    • 1...Sdc4
      • 2.Qc3#
  • Tries
    • 1.Se3?
      • threat
        • 2.Qa1#
      • 1...Kc3
        • 2.Qa1#
      • 1...Sdb1
        • 2.Se6#
      • 1...Sb3
        • 2.Se6#
      • 1...Sdc4
        • 2.Se6#
      • 1...Se4
        • 2.Se6#
      • 1...Sab1
        • 2.Sb5#
      • 1...Sc2
        • 2.Sb5#
      • 1...Sac4
        • 2.Sb5#
      • 1...Sb5
        • 2.Sxb5#
      • 1...Bxe2!
    • 1.Be4?
      • threat
        • 2.Se6#
      • 1...Bg7
        • 2.e3#
      • 1...Sxe4!
    • 1.Rxg4+?
      • 1...Se4
        • 2.Rxe4#
        • 2.Qc3#
      • 1...Bf4!
    • 1.e3+?
      • 1...Bxe3
        • 2.Qxe3#
      • 1...Kxd3!
  • Keys
    • 1.e4!
      • threat
        • 2.Se6#
      • 1...Sxe4
        • 2.Qxe4#
      • 1...Be3
        • 2.Qxe3#
      • 1...Sf3
        • 2.Qc3#
      • 1...Bg7
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(h);OGATE::P(D),XB(h)
    • S(b);OGATE::QAB1(B)
  • Tries
    • Try
      • S(A);
      • Threat
        • QAB(B)
      • Vars
        • K(d);P_SPINS(b),S_FLIGHT::QAB(B)
        • S(b);::S(J)
        • S(c);N_GUARD::S(J)
        • S(c);N_GUARD::S(J),XS(c)
      • Refutation
        • B(a);XP(C)
    • Try
      • B(I);
      • Threat
        • S(J)
      • Vars
        • B(h);N_GUARD,N_SPINR(f)::P(C)
      • Refutation
        • S(b);XB(I)
    • Try
      • R(F);CHECK,XP(e)
      • Refutation
        • B(h);P_SPINB(h)
    • Try
      • P(C);CHECK
      • Vars
        • B(h);OGATE,XP(C)::QAB1(B),XB(h)
      • Refutation
        • K(d);N_SPINR(f),P-FLIGHT,XP(E)
  • Actual
    • P(C);
    • Threat
      • S(J)
    • Vars
      • S(b);OGATE,XP(C)::QAR1(B),XS(b)
      • B(h);N_GUARD::QAB1(B),XB(h)
      • S(b);OGATE::QAB1(B)
      • B(h);N_GUARD,N_SPINR(f)::QAB1(B)
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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).