MESON Chess Problem Database

Problem Display
PID: 197239 (1K6/B3p3/b5pb/3R1P2/1p2knnR/3pNpPp/Q1P1B3/3N4 w - - 0 1)

Shanshin, Valery Yurevich

1st HM., StrateGems, 2019

1K6/B3p3/b5pb/3R1P2/1p2knnR/3pNpPp/Q1P1B3/3N4

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Bc4
      • 2.Qxc4#
    • 1...Bb7
      • 2.Qc4#
    • 1...Bc8
      • 2.Qc4#
    • 1...Sxe2
      • 2.Sf2#
    • 1...Sg2
      • 2.Sf2#
    • 1...Sxd5
      • 2.Qxd5#
    • 1...Sh5
      • 2.Sf2#
    • 1...Se6
      • 2.Sf2#
    • 1...Sf2
      • 2.Sxf2#
    • 1...Sh2
      • 2.Sf2#
    • 1...Sxe3
      • 2.Sf2#
    • 1...Se5
      • 2.Sf2#
      • 2.Rd4#
    • 1...Sf6
      • 2.Sf2#
    • 1...b3
      • 2.Sc3#
  • Tries
    • 1.Rxg4?
      • threat
        • 2.Sf2#
      • 1...f2
        • 2.Sxf2#
      • 1...fxe2!
    • 1.Re5+?
      • 1...Sxe5
        • 2.Sf2#
        • 2.Qd5#
      • 1...Kxe5!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Sd2#
      • 1...Kxd5
        • 2.Bxf3#
      • 1...Bxc4
        • 2.Qxc4#
      • 1...Sxe2
        • 2.Re5#
      • 1...Sxd5
        • 2.Bxd3#
      • 1...Se5
        • 2.Rxe5#
      • 1...e5
        • 2.Sd6#
      • 1...Sg2
        • 2.Re5#
      • 1...Sh5
        • 2.Re5#
      • 1...Se6
        • 2.Re5#
      • 1...d2
        • 2.Sxd2#
      • 1...b3
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • B(h);N_GUARD::QAR2(B),XB(h)
    • B(h);N_GUARD::QAR2(B)
    • S(f);P_SPINS(g),XB(D)::S(A)
    • S(f);P_SPINS(g)::S(A)
    • S(f);OGATE,P_SPINS(g),XR(H)::QAB1(B),XS(f)
    • S(g);N_GUARD,P_SPINS(f)::S(A),XS(g)
    • S(g);N_GUARD,P_SPINS(f)::S(A)
    • S(g);N_GUARD,P_SPINS(f),XS(E)::S(A)
    • P(d);N_GUARD::S(A)
  • Tries
    • Try
      • R(G);P_PINS(f),XS(g)
      • Threat
        • S(A)
      • Vars
        • P(b);::S(A),XP(b)
      • Refutation
        • P(b);XB(D)
    • Try
      • R(H);CHECK
      • Refutation
        • K(e);P-FLIGHT,XR(H)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(e);S_FLIGHT,XR(H)::B(D),XP(b)
      • B(h);OGATE,XS(E)::QAR2(B),XB(h)
      • S(f);P_SPINS(g),XB(D)::R1(H)
      • S(f);N_GUARD,P_SPINS(g),SBLOCK,XR(H)::B(D),XP(a)
      • S(g);N_GUARD,P_SPINS(f)::R1(H),XS(g)
      • P(k);N_GUARD::S(E)
      • S(f);P_SPINS(g)::R1(H)
      • P(a);::S(E),XP(a)
      • P(d);N_GUARD::S(A)
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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).