MESON Chess Problem Database

Problem Display
PID: 237811 (8/Q5B1/3p1npN/1R1b2nR/2P2k2/8/4P2P/1B1K4 w - - 0 1)

Pituk, Alexander

Arbejder-Skak, 1948

8/Q5B1/3p1npN/1R1b2nR/2P2k2/8/4P2P/1B1K4

#2

10 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qe3#
    • 1...Sf3
      • 2.e3#
    • 1...Se4
      • 2.Rh4#
    • 1...Sd7
      • 2.Rh4#
    • 1...Sh7
      • 2.Rh4#
    • 1...Se8
      • 2.Rh4#
    • 1...Sg8
      • 2.Rh4#
  • Tries
    • 1.Bxf6?
      • threat
        • 2.Rh4#
      • 1...Bf3
        • 2.Bxg5#
      • 1...Be6
        • 2.Bxg5#
      • 1...Sf3
        • 2.e3#
      • 1...gxh5!
    • 1.Rh4+?
      • 1...Sg4
        • 2.Rxg4#
      • 1...Ke5!
    • 1.Qf2+?
      • 1...Ke5
        • 2.Qe3#
        • 2.Qxf6#
      • 1...Sf3
        • 2.e3#
      • 1...Bf3!
    • 1.Qd4+?
      • 1...Be4
        • 2.Qd2#
      • 1...Sfe4
        • 2.Rh4#
      • 1...Sge4!
    • 1.e3+?
      • 1...Ke5
        • 2.Qe7#
      • 1...Kf3!
  • Keys
    • 1.Qa3!
      • threat
        • 2.Qg3#
      • 1...Ke5
        • 2.Qe3#
      • 1...Sxh5
        • 2.Qc1#
      • 1...Sge4
        • 2.Qf3#
      • 1...Bf3
        • 2.Qc1#
      • 1...Sf3
        • 2.e3#
      • 1...Sfe4
        • 2.Rh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • K(a);P_SPINB(b),P_SPINS(c),S_FLIGHT::QAR2(I)
    • S(c);SBLOCK::P(C)
    • S(e);N_GUARD::R(G)
  • Tries
    • Try
      • B(J);XS(e)
      • Threat
        • R(G)
      • Vars
        • B(b);P_PINP(C)::B(J),XS(c)
        • B(b);::B(J),XS(c)
        • S(c);SBLOCK::P(C)
      • Refutation
        • P(f);XR(G)
    • Try
      • R(G);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::R1(G),XS(e)
      • Refutation
        • K(a);P_SPINB(b),P_SPINS(e),S_FLIGHT
    • Try
      • Q(I);CHECK
      • Vars
        • S(c);P_SPINS(c)::P(C)
      • Refutation
        • B(b);P_PINP(C),P_SPINB(b)
    • Try
      • Q(I);CHECK
      • Vars
        • B(b);P_SPINB(b)::QAB(I)
        • S(e);P_SPINS(e)::R(G)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • P(C);CHECK
      • Vars
        • K(a);P_SPINB(b),P_SPINS(c),S_FLIGHT::QAR2(I)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(I);
    • Threat
      • QAB1(I)
    • Vars
      • K(a);P_SPINB(b),P_SPINS(c),S_FLIGHT::QAR2(I)
      • S(e);XR(G)::QAB(I)
      • S(c);N_GUARD,S_CUTB(b)::QAR1(I)
      • B(b);P_PINP(C)::QAB(I)
      • S(c);SBLOCK::P(C)
      • S(e);N_GUARD::R(G)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).