MESON Chess Problem Database

Problem Display
PID: 271708 (8/4p1Q1/1pK3n1/6p1/Rpp1k1Nn/3N3B/2PP3B/5R1b w - - 0 1)

Dowd, Steven B

Tarnawiecki, Antonio

The Hopper, 2023

8/4p1Q1/1pK3n1/6p1/Rpp1k1Nn/3N3B/2PP3B/5R1b

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.Sgf2#
    • 1...Sf3
      • 2.Sgf2#
    • 1...Sf4
      • 2.Qe5#
    • 1...Se5+
      • 2.Qxe5#
    • 1...Sf8
      • 2.Qe5#
    • 1...Sh8
      • 2.Qe5#
    • 1...b3
      • 2.Rxc4#
    • 1...cxd3
      • 2.Rxb4#
    • 1...c3
      • 2.Rxb4#
    • 1...b5
      • 2.Sc5#
  • Tries
    • 1.Se1?
      • threat
        • 2.Sf2#
      • 1...Se5+
        • 2.Qxe5#
      • 1...e5!
    • 1.Bg1?
      • threat
        • 2.Qd4#
      • 1...Se5+
        • 2.Qxe5#
      • 1...Bf3
        • 2.Sgf2#
      • 1...Sf3
        • 2.Sgf2#
        • 2.Qxg6#
      • 1...Sf4
        • 2.Qe5#
      • 1...e5
        • 2.Sf6#
      • 1...Sf5!
    • 1.Re1+?
      • 1...Kf3
        • 2.Re3#
      • 1...Kf5+!
    • 1.Rxb4?
      • threat
        • 2.Rxc4#
      • 1...Se5+
        • 2.Qxe5#
      • 1...Bf3
        • 2.Sgf2#
      • 1...Sf3
        • 2.Sgf2#
      • 1...Sf4
        • 2.Qe5#
      • 1...b5
        • 2.Sc5#
      • 1...Sf5!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qxc4#
      • 1...Se5+
        • 2.Qxe5#
      • 1...bxc3
        • 2.Rxc4#
      • 1...cxd3
        • 2.Rxb4#
        • 2.Qxb4#
        • 2.Qxd3#
        • 2.Qc4#
        • 2.cxd3#
      • 1...Bf3
        • 2.Sgf2#
      • 1...Sf3
        • 2.Sgf2#
      • 1...Sf4
        • 2.Qe5#
      • 1...Sf5
        • 2.Sdf2#
      • 1...b5
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • B(a);SBLOCK::S(H)
    • S(e);SBLOCK::S(H)
    • S(h);N_GUARD::QAR1(J)
    • S(h);CHECK,N_GUARD::QAR1(J),XS(h)
    • P(b);OGATE,P_SPINP(c)::R(G),XP(c)
    • P(c);OGATEB,P_SPINP(b),XS(E)::R(G),XP(b)
    • P(c);OGATEB,P_SPINP(b)::R(G),XP(b)
    • P(g);N_GUARD::S(E)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(H)
      • Vars
        • S(h);CHECK,N_GUARD::QAR1(J),XS(h)
      • Refutation
        • P(i);
    • Try
      • B(D);
      • Threat
        • QAR1(J)
      • Vars
        • S(h);CHECK,N_GUARD::QAR1(J),XS(h)
        • B(a);SBLOCK::S(H)
        • S(h);N_GUARD::QAR1(J)
        • P(i);N_GUARD::S(H)
      • Refutation
        • S(e);
    • Try
      • R(A);CHECK
      • Vars
        • K(d);N_GUARD,S_FLIGHT::R1(A)
      • Refutation
        • K(d);CHECK,S_FLIGHT
    • Try
      • R(G);P_PINP(c),XP(b)
      • Threat
        • R(G),XP(c)
      • Vars
        • S(h);CHECK,N_GUARD::QAR1(J),XS(h)
        • B(a);SBLOCK::S(H)
        • S(e);SBLOCK::S(H)
        • S(h);N_GUARD::QAR1(J)
        • P(g);N_GUARD::S(E)
      • Refutation
        • S(e);
  • Actual
    • Q(J);
    • Threat
      • QAR2(J),XP(c)
    • Vars
      • S(h);CHECK,N_GUARD::QAR1(J),XS(h)
      • P(b);OGATE,P_SPINP(c),XQ(J)::R(G),XP(c)
      • B(a);SBLOCK::S(H)
      • S(e);SBLOCK::S(H)
      • S(h);N_GUARD::QAR1(J)
      • S(e);SBLOCK::S(E)
      • P(g);N_GUARD::S(E)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).