MESON Chess Problem Database

Problem Display
PID: 279031 (2RnN3/P5P1/1PPPP2R/3k3K/3B1p1p/1p1P1Nb1/1p6/6Q1 w - - 0 1)

Einat, Paz

The Problemist, 2024

2RnN3/P5P1/1PPPP2R/3k3K/3B1p1p/1p1P1Nb1/1p6/6Q1

#2

14 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Be1
      • 2.Qg5#
    • 1...Bf2
      • 2.Qg5#
    • 1...Bh2
      • 2.Qg5#
  • Tries
    • 1.Be5?
      • threat
        • 2.Qd4#
      • 1...Sxc6
        • 2.Sc7#
      • 1...Sxe6
        • 2.Sf6#
      • 1...Bf2!
    • 1.Qe3?
      • threat
        • 2.Qe4#
        • 2.Qe5#
      • 1...Sxc6
        • 2.Qe4#
      • 1...Sf7
        • 2.Qe4#
      • 1...fxe3!
    • 1.Qe1?
      • threat
        • 2.Qa5#
        • 2.Qe4#
        • 2.Qe5#
      • 1...Sxc6
        • 2.Qe4#
      • 1...Sxe6
        • 2.Qe4#
        • 2.Qe5#
        • 2.Qxe6#
      • 1...Sb7
        • 2.Qe4#
        • 2.Qe5#
      • 1...Sf7
        • 2.Qa5#
        • 2.Qe4#
      • 1...Bxe1!
    • 1.a8Q?
      • threat
        • 2.Qa5#
      • 1...Sxc6
        • 2.Qxc6#
      • 1...Sxe6
        • 2.c7#
      • 1...Be1
        • 2.Qg5#
      • 1...Sb7!
    • 1.g8Q?
      • threat
        • 2.Qg5#
      • 1...Sxc6
        • 2.e7#
      • 1...Sxe6
        • 2.Qxe6#
      • 1...Sf7!
  • Keys
    • 1.Bc5!
      • threat
        • 2.Qd4#
      • 1...Sxc6
        • 2.Sc7#
      • 1...Sxe6
        • 2.Sf6#
      • 1...Bf2
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(c);OGATE::QAR(A)
  • Tries
    • Try
      • B(D);
      • Threat
        • QAR1(A)
      • Vars
        • S(g);SBLOCK,XP(G)::S(N)
        • S(g);SBLOCK,XP(I)::S(N)
      • Refutation
        • B(c);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(g);XP(G)::QAB1(A)
        • S(g);::QAB1(A)
      • Refutation
        • P(d);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • S(g);XP(G)::QAB1(A)
      • Refutation
        • B(c);XQ(A)
    • Try
      • P(K);
      • Threat
        • QAR(K)
      • Vars
        • S(g);OGATE,P_SPINS(g),XP(G)::QAB1(K),XS(g)
        • S(g);N_GUARD,XP(I)::QAB(K)+P(G)
        • B(c);OGATE::QAR(A)
      • Refutation
        • S(g);
    • Try
      • P(L);
      • Threat
        • QAR(L)
      • Vars
        • S(g);N_GUARD,XP(G)::QAB(L)+P(I)
        • S(g);OGATE,P_SPINS(g),XP(I)::QAB1(L),XS(g)
      • Refutation
        • S(g);
  • Actual
    • B(D);
    • Threat
      • QAR1(A)
    • Vars
      • S(g);SBLOCK,XP(G)::S(N)
      • S(g);SBLOCK,XP(I)::S(N)
      • B(c);OGATE::QAR(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).