MESON Chess Problem Database

Problem Display
PID: 165633 (3B3b/1nKR1p2/R1n1kP2/1Nr3p1/2p3P1/1BQP1P2/b2N4/8 w - - 0 1)

Barnes, Barry Peter

Probleemblad, 2017

3B3b/1nKR1p2/R1n1kP2/1Nr3p1/2p3P1/1BQP1P2/b2N4/8

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Re7#
    • 1...Re5
      • 2.Sd4#
    • 1...Bxf6
      • 2.Qxf6#
    • 1...Sa5
      • 2.Rd6#
    • 1...Sd6
      • 2.Rxd6#
    • 1...Sxd8
      • 2.Rd6#
  • Tries
    • 1.Kc8?
      • threat
        • 2.Sc7#
      • 1...Sd6+
        • 2.Rxd6#
      • 1...Rxb5!
    • 1.Sxc4?
      • threat
        • 2.Sd4#
      • 1...Rxc4
        • 2.Qe1#
      • 1...Bxf6
        • 2.Qxf6#
      • 1...Sxd8
        • 2.Rd6#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Rd5
        • 2.Re7#
      • 1...Rxb5!
    • 1.Rxc6+?
      • 1...Sd6
        • 2.Rxd6#
      • 1...Rxc6+!
    • 1.Qd4?
      • threat
        • 2.Re7#
      • 1...Bxf6
        • 2.Qxf6#
      • 1...Sd6
        • 2.Rxd6#
        • 2.Qxd6#
      • 1...Re5!
    • 1.Qe5+?
      • 1...Rxe5
        • 2.Sd4#
      • 1...Kxe5!
    • 1.Qxc4+?
      • 1...Ke5
        • 2.Qe4#
      • 1...Rd5
        • 2.Qxd5#
        • 2.Qe4#
      • 1...Rxc4!
  • Keys
    • 1.dxc4!
      • threat
        • 2.Re7#
      • 1...Rxc4
        • 2.Qe3#
      • 1...Bxf6
        • 2.Qxf6#
      • 1...Re5
        • 2.Sd4#
      • 1...Sd6
        • 2.Rxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(c);N_SPINP(b),SBLOCK::R1(K)
    • R(c);SBLOCK::S(G)
    • B(i);OGATE,XP(I)::QAR1(C),XB(i)
    • S(g);N_GUARD::R1(K)
    • S(g);N_GUARD,N_SPINS(e)::R1(K),XS(g)
    • S(g);N_GUARD,XB(L)::R1(K)
  • Tries
    • Try
      • K(J);P-FLIGHT
      • Threat
        • S(G)
      • Vars
        • S(g);CHECK,N_GUARD,N_SPINS(e)::R1(K),XS(g)
      • Refutation
        • R(c);XS(G)
    • Try
      • S(A);XP(b)
      • Threat
        • S(G)
      • Vars
        • R(c);N_GUARD,P_SPINR(c),XS(A)::QAR(C)
        • B(i);OGATE,XP(I)::QAR1(C),XB(i)
        • S(g);N_GUARD,XB(L)::R1(K)
        • S(g);N_GUARD,N_SPINS(e)::R1(K),XS(g)
        • R(c);SBLOCK::R1(K)
      • Refutation
        • R(c);XS(G)
    • Try
      • R(H);CHECK,P_SPINR(H),XS(e)
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::R1(K),XS(g)
      • Refutation
        • R(c);CHECK,XR(H)
    • Try
      • Q(C);
      • Threat
        • R1(K)
      • Vars
        • B(i);OGATE,XP(I)::QAR1(C),XB(i)
      • Refutation
        • R(c);
    • Try
      • Q(C);CHECK
      • Vars
        • R(c);SBLOCK,XQ(C)::S(G)
      • Refutation
        • K(f);N_SPINP(b),N_SPINS(e),P-FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK,XP(b)
      • Vars
        • K(f);N_SPINS(e),P-FLIGHT::QAR1(C)
      • Refutation
        • R(c);P_SPINR(c),XQ(C)
  • Actual
    • P(D);XP(b)
    • Threat
      • R1(K)
    • Vars
      • R(c);N_GUARD,P_SPINR(c),XP(D)::QAR(C)
      • B(i);OGATE,XP(I)::QAR1(C),XB(i)
      • R(c);SBLOCK::S(G)
      • S(g);N_GUARD,N_SPINS(e)::R1(K),XS(g)
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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).