MESON Chess Problem Database

Problem Display
PID: 237818 (8/1BprP3/1pN5/1p1k1PK1/bB4nR/p2N3R/P3p1n1/3Q4 w - - 0 1)

Pituk, Alexander

Arbejder-Skak, 1962

8/1BprP3/1pN5/1p1k1PK1/bB4nR/p2N3R/P3p1n1/3Q4

#2

11 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Sde5#
    • 1...Ke4
      • 2.Sf2#
    • 1...Sf2
      • 2.Rd4#
    • 1...Sh2
      • 2.Rd4#
    • 1...Se3
      • 2.Rd4#
    • 1...Se5
      • 2.Rd4#
    • 1...Sf6
      • 2.Rd4#
    • 1...Sh6
      • 2.Rd4#
  • Tries
    • 1.Sf4+?
      • 1...Kc4
        • 2.Rc3#
      • 1...Ke4!
    • 1.Sa5+?
      • 1...Kd4
        • 2.Qa1#
      • 1...c6!
    • 1.Sce5+?
      • 1...Kd4
        • 2.Qa1#
      • 1...c6!
    • 1.Qb3+?
      • 1...Ke4
        • 2.Sf2#
        • 2.Qe6#
      • 1...Bxb3!
    • 1.Qg1?
      • threat
        • 2.Qd4#
      • 1...Kc4
        • 2.Sce5#
      • 1...Ke4
        • 2.Qxg2#
      • 1...Sf2
        • 2.Rd4#
      • 1...S4e3
        • 2.Rd4#
      • 1...S2e3!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qd4#
      • 1...Kc4
        • 2.Sce5#
      • 1...Ke4
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • K(g);P_SPINS(e),S_FLIGHT::S(C)
    • S(e);OGATE::R1(F)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(g);S_FLIGHT::R1(D)
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • S(I);CHECK
      • Vars
        • K(g);P-FLIGHT,P_SPINS(e)::QAB(A)
      • Refutation
        • P(i);P_SPINP(i)
    • Try
      • S(I);CHECK
      • Vars
        • K(g);P-FLIGHT,P_SPINS(e)::QAB(A)
      • Refutation
        • P(i);P_SPINP(i)
    • Try
      • Q(A);CHECK
      • Refutation
        • B(d);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(g);P_SPINS(e),S_FLIGHT::S(I)
        • K(g);P_SPINS(e),S_FLIGHT::QAB(A),XS(b)
        • S(e);OGATE::R1(F)
      • Refutation
        • S(b);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(g);P_SPINS(e),S_FLIGHT::S(I)
      • K(g);P_SPINS(e),S_FLIGHT::QAR1(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).